CROCODILIANS, LIZARDS, AND SNAKES. 



681 



pair of froiitals. There are also two small plates between the third 

 labial and the suboculars. The anus is preceded by a transverse series 

 of six longitudinal plates. There is a single preanal pore in a large 

 plate in front of the external i^reanal plate of each side. 



Measurements. — Total length, 199 mm.; limb, 8 mm.; tail, 18 mm.; 

 head, 7 mm. 



Kostral plate triangular, the apex touching the interuasal. The 

 latter is twice as wide as long, and the frontals are wider than long. 

 The nasal is subtriangular, with an obtuse apex directed posteriorly. 

 The nostril is anterior to the center. The lirst superior labial is as 

 long as the two others together. The symphyseal is large and is suc- 

 ceeded by four inferior labials; the first largest, the second interme- 

 diate, and the third and fourth subquadrate much smaller. A large 

 postmental longer than wide, which is bounded in front on each side 

 by the first labial and for the greater part by a large infralabial, which 

 separates it from the second labial. A band of fourteen scales between 

 the angles of the mouth below and eighteen above. 



The dorsal and abdominal scales are separated by a longitudinal 

 groove which extends to the anus. The abdominal scales are about 

 twice as long as the dorsals, one row answering to two of the latter, 

 with an occasional opposition of the extremities of single rows as an 

 exception. There are twenty-four rectangular divisions of each abdom- 

 inal cross band, the terminal ones small and subtrangular. In a dorsal 

 cross band there are twenty-nine transverse divisions. On the thoracic 

 region the bands are interrupted on the middle line, alternating with 

 each other and forming chevrons directed forward. The last gular 

 band is short and convex posteriorly. The number of the bands is as 

 follows: Gular, 7; thoracic, 4; abdominal, 138; caudal, 20. A few of 

 of the caiulal may be alternate on the middle line. The preanal plates 

 are unequal, the median pair being much the largest. The next 

 external are nearly as long and are very narrow; the third or external 

 pair one-half the size of the second. In front of it is a larger scale 

 leaving the pore in its posterior region, and external to the latter are 

 two small scales. 



The fore limbs are annulate, with scales like those of the belly, in 

 six bands, from shoulder to digits. Digits I, II, and III equal and 

 two-fifths the length of the arm; IV shorter, and Y shortest. 



Measurements (Cat. No. 21325).— Total length, 202 mm. ; total length 

 of head to angle of mouth, 5 mm. ; total length of tail, 20 mm. ; total 

 length of fore limb, 7.o mm. 



EucMrotes hiporus Cope. 



