OCR Text |
Show 1884.] GENERA SICYDIUM A N D LENTIPES. 155 II. Anterior mandibular teeth larger than the following. A. Teeth in the upper jaw bicuspid. a. Margin of the upper lip serrate 8. S. pugnans. B. Teeth in the upper jaw tricuspid. a. Scales subequal. a. First eight or ten rows on the occiput very small. Head four and a half in the length (without the caudal). Caudal with a dark horseshoe-like marginal band met by a tBheec ornodo tp.a ssDi.n g6 aAl.o ngA t.h e middle rays from 11 ~" 10 /3. First two or three rows of scales on the occiput very small. Head five and a half in the length (without the caudal). Caudal with a dark horseshoe-like marginal band met by a second passing along the middle rajs. D. 6-. A. 9. S. tamiurum. 11 Diameter of the eye is nearly equal to the interorbital space. D. 6,-r. A. - Diameter of the eye equals the interorbital space. The maxilla extends to the vertical from the middle of the eye. D. T T ^ . A. 10. 11. S. lagocephalum. S. elegans *. 11-12* - 10-11 e. Head and anterior portion of the trunk scaleless. Diameter of the eye equals the interorbital space. D. 5-6^^^-. A. ^ j ^ Z,. A broad white band from the tip of the 12. 8. xanthurum*. 13. S. gymnauchen' snout to the root of the caudal, below which is a longitudinal row of large black spots 14. S. albo-tceniatum*. b. Scales on the middle of the trunk larger or much larger than those on the anterior parts and tail. a. Upper lip with a slight median cleft; caudal much shorter than the head, with a black horseshoe-like marginal band met by a second passing along its middle rays ; the diameter of the eye is one third of the interorbital space. D. 6r-r. A. r-. L. trans. 15 15. S. micrurum. /3. Upper lip without median cleft; the last ray of the dorsal much produced, extending past the base of the caudal. Colour uniform black. D. 6^. A. ^. L. trans. 16 Upper lip with a deep median cleft, and two round lateral notches below the nostrils. D. 6-. 16. 10 A*fo* L* S. nigrescens. trans. 13 ... 17. S. stimpsoni. Upper lip with a slight median cleft; caudal longer than the head, olive with a yellow margin ; diameter of the eye half the interorbital space; the maxilla extends to the vertical from the anterior 11* |