234 
11. Gobius, sp. 
12. Lembus maculatus, Gthr. 
13. Chromis rivulata, Gthr. 
14. *Pimelodus cinerascens, Gthr. 
15. *Pimelodus elongatus, Gthr. 
16. *Pimelodus modestus, Gthr. 
17. Lebiasina bimaculata, Cuv. & Val. 
18. *Brycon dentex, Gthr. 
19. Tetragonopterus rutilus, Jenyns. 
3. Descriptions of the New Species, and additional Remarks on some 
others. 
AmEIva sex-scuTaTA, Gthr. Proc. Zool. Soc. 1859, p. 402. 
Two very fine specimens, and larger than the former, are in the 
collection. We see by them that the frontal, parietal, and occi- 
pital shields lose their regular arrangement with age, and are replaced 
by many small, irregular, keeled shields. The bands become more 
indistinct, though they are visible. In every other respect, especially 
in the number of the ventral plates, these specimens agree completely 
with that described anted, page 402. 
: inches. lines. 
Lengtivot the Reid ).- ore jcc Dens pects ea 78 
OQuithe (rane ee ese ee oa ace k= abhi Bey 90 | 
ILE M1 i Mile fet) Sie ale genre Segal ekg | 
"Total Jemet i gcis ie sis fue x's a aor sn es ores 8 Lf iets 
BASILIsCcUS SEEMANNI (Craneosaura_ seemanni, Gray in Voy. 
Herald, Zool. p. 148, pl. 25). 
Diagnosis.—The basal portion of the crest of the head swollen, 
its upper and posterior profiles rounded ; the crest along the back 
and tail low. Scales of the breast slightly keeled. The upper parts 
greenish or brownish ; the back with irregular brown or ferruginous 
cross-bands ; side of the body without longitudinal band; two white 
bands, the one from the angle of the mouth, the other from the chin, 
to the posterior extremity of the mandibula ; a black band between. 
Beneath uniform white; throat with a blackish streak on each side. 
Hab. Esmeraldas. 
Description.—I abstain from giving a detailed description of the 
general form and of the scales of this species, as Dr. Gray has given 
a very good figure of an old specimen, and as it is nearly allied to 
Basiliscus (Corytheolus) vittatus, from which, however, it may be 
readily distinguished by the occipital crest, which is rounded poste- 
riorly, and not angular, and by its different coloration. This species 
is herbivorous, as probably all the species of Basiliscus are. 
The series of the different ages and sexes being very complete, I 
will point out some remarkable changes which this species under- 
goes :— 
i. Ina very young specimen—head and trunk 2 inches, tail 4 inches 
in length—the head is very short ; the occiput globular, without any 
