3. LEPTOGNATHUS. 447 
Synopsis of the Species. 
I. Scales in 13 rows, vertebrals enlarged. 
Eight (rarely nine) upper labials ; ven- 
trals 162-190 ; subcaudals 82-108. 1. catesbyi, p. 449. 
‘Ten or eleven upper labials; ventrals 
186-220 ; subcaudals 112-145 .... 2. pavonina, p. 450. 
IT. Scales in 15 rows. 
A. First two or three pairs of lower labials in contact behind the 
symphysial; ventrals 162-192; subcaudals 85-91. 
1. Vertebral scales moderately enlarged. 
Nine or ten upper labials .......... 3. variegata, p. 451. 
Seven upper labials........... Tons 4, albifrons, p. 451. 
2. Vertebral scales scarcely enlarged; nine or ten upper 
PADIBIA: 533 4,2 sia dah ae ees 5. brevifacies, p. 452. 
B. First lower labial in contact with its fellow behind the sym- 
physial. 
1. Vertebral scales very strongly enlarged, the largest nearly 
twice as broad as long; ventrals 184-188; subcaudals 
82-94. 
a. Kight upper labials. 
Rostral broader than deep; no pree- 
POORER | esas vss o hea ean baer 6. andiana, p. 452. 
Rostral nearly as deep as broad; one 
prcadonlar |. a. 4s: cane pees ene 7. elegans, p. 452, 
6. Seven upper labials........ 8. leucomelas, p. 453. 
2. Vertebral scales moderately enlarged. 
a. Ventrals 156-180; subcaudals 45-90. 
Subcaudals 53-90 ; three labials behind 
those entering the eye............ 9. mikani, p. 453. 
Subcaudals 45-52; two labials behind 
those entering the eye............ 10. ventrimaculata, p. 454. 
Subcaudals 61; five labials behind 
those entering the eye............ 11. inequifasciata, p. 455. 
b. Ventrals 164-197 ; subcaudals 110-114. 
TWO PEOICUATA! 5 oi he Pee ieee te 13. alternans, p. 456. 
No prencdulat iii idee aiclea is 14, viguiert, p. 457. 
