The following species and subspecies do not appear in the present synonym lists because of the lack of sufficient study:

Lethrinus aurolineatus Macleay, 1883: 247, New Guinea.
L. aurolineatus Fourmanoir, 1961: 90, Comores (junior homonym).
L. cinereus Valenciennes in Cuvier & Valenciennes, 1830: 293, Kaitz (Ceylon).
L. cinnabarinus Richardson, 1843: 8, p1. 4, fig. 2, Houtmans Abrolhos (western Australia).
L. devisianus Whitley, 1929: 122, Wide Bay (Queensland).
L. Ehrenbergii Valenciennes in Cuvier & Valenciennes, 1830: 312, Red Sea.
L. erythrophthalmus Kittlitz, 1858: 87, Senjawins I.
L. glyphodon Günther, 1859: 462, Louisiades.
L. Jagorii Peters, 1868: 257, Paracali (Luzon).
L. Johnii Castelnau, 1873: 84, Port Darwin.
L. karwa Valenciennes in Cuvier & Valenciennes, 1830: 311, Vizagapatam.
L. lachrymans Saville-Kent, 1893: 369, Queensland.
L. laticaudis Alleyne & Macleay, 1877: 276, p1. 8, fig. 2, Percy Is. (Queensland).
L. margaritifer Saville-Kent, 1893: 369, Queensland.
Pentapodus nubilus Cantor, 1849: 1031, Sea of Pinang.
Lethrinus regius Saville-Kent, 1893: 369, Queensland.
L. rostratus specificus Borodin, 1932: 82, Society Is.
L. virescens Valenciennes in Cuvier & Valenciennes, 1830: 308.
L. viridis Saville-Kent, 1893: 369, Queensland.
L. xanthopterus Valenciennes in Cuvier & Valenciennes, 1830: 315, Ulea.

L. cinereus was based on a specimen of Raynaud's of ca. 15 cm in total length. The present author could not find this specimen in Paris. According to Valenciennes's description, it has a rather deep body, short snout and rounded teeth.

The type of L. cinnabarinus cannot be found in the British Museum. Lieut. Emery's drawing of the type (ca. 60 cm total length) shows a body color of bright red with several blue and white streaks on the dorsal half of the flank. From these color patterns this species seems to be distinct, but the drawing is too crude to tell its characteristics in detail.

The present author could not get any information of the type of L. Ehrenbergii in Paris. Valenciennes's description based on Ehrenberg's drawing of the specimen which is ca. 25 cm in total length does not contain any diagnoses of this species.

The two types of L. glyphodon which according to Günther are dried specimens are missing from the British Museum now. Though Günther's description is long, it does not contain sufficient diagnoses and can be applied to several species with deep bodies and large molars in the jaws.

The type of L. Jagorii in Berlin (ZMHU6302) is a juvenile of 48 mm in standard length. The condition of the preservation is not good enough to know more than the fact that it belongs to a species with a deeper body than head length and 5 scale rows between the lateral line and median dorsal spines.

L. karwa was based on a drawing of Russel's. It has a deep body like L. ornatus.

L. laticaudis is especially noteworthy in the fact that it has an extraordinarily deep body. According to Alleyne & Macleay's description, the body depth of the ca. 25 cm (total length) type is contained 2.5 times in the total length. Ogilby's (1912: 52) redescription of the type is not sufficient enough to characterize this species.

Cantor's description of Pentapodus nuhilus shows the features of Lethrinus well. Günther (1859:382), after examining the type (the dried skin of an individual of ca. 10 cm total length), also thought this species was a Lethrinus, though it is difficult to know any features as a distinct species except for its long head.

L. virescens is another species with a very peculiar body shape. Though this species was based on a dried specimen of ca. 15 cm total length in the Cabinet du Roi, the present author could not find it in Paris. Valenciennes's description says it has a very deep body (3 in total length), a much more elevated occiput than that of any other species, and an extraordinarily big eye (nearly 2 in head), while the fin counts accord well with common Lethrinus species. It is probable that the specimen had deformed in the process of drying.

L. xanthopterus was based on a drawing of Mertens & Ketlitz's. Judging from Valen ciennes's unpublished sketch of that drawing, this species belongs to the group with more slender bodies. But this sketched drawing is so rough that we cannot tell exactly whether or not this species is really a Lethrinus. Its dorsal shape and anal counts are different from those of other Lethrinus species.