1894.] NATURAL SCIENCES OF PHILADELPHIA. 205 



Char, specif. — Rostral plate rounded obtuse, visible from above; 

 internasals small; prefrontals large, descending laterally and touching 

 second superior labial. Frontal elongate, slightly angulate in front, 

 acute posteriorly; parietals elongate. Nostril in posterior part of 

 prenasal ; postnasal elongate, separated from preocular by suture 

 between prefrontal and second labial. Oculars 1-2, preocular well 

 removed from frontal ; temporals 1-1, superior labials seven ; the 

 first bounds the postnasal below; the second the prefrontal and the 

 preocular; third and fourth enter orbit; fifth and sixth lower than 

 the large seventh. Inferior labials only six ; those of the first pair 

 in contact behind the symphyseal ; the fourth elongate, terminating 

 opposite the end of the long genial. Gastrosteges, 146; anal, 1-1; 

 urosteges, 20 + (a considerable part of the tail lost). Length to 

 vent, 223 mm. ; do. to rictus oris, 9 mm. 



Color in alcohol, above light brown, below yellow. INIedian dor- 

 sal row of scales deep brown; a narrow yellow line on the adjacent 

 borders of the third and fourth rows of scales which is bounded 

 above by a single dark brown row, and below by several rows with 

 dark brown centers, growing paler towards the gastrosteges. All 

 the colors are less conspicuous posteriorly. Upper surface of head 

 light reddish- brown, with a pale spot at the extremity of each 

 parietal plate. Upper lip yellow, with a black spot below eye ; 

 lower labial plates with brown borders; gular region unspotted. 



No. 141, Jimenez ; A. Alfaro. 



Enulius torquatus Giintlier. Leplocalamns loi-qiiatus Giinther. Aim. Mag. 

 Nat. Hist., 1872, p. 16. 



This specimen gives me the 0])portunity of examining the hemi- 

 ])enis of this genus. I find that it is undivided, but that the sulcus 

 is bifurcate near the extremity. The surface of the organ is marked 

 with longitudinal laminre only, and these are set with numerous small 

 spines to the apex. The larainre are separated by deep grooves. 



As already described by me, there are very few teeth in the mouth. 

 These consist of a few small ones at the posterior part of the maxil- 

 lary bone, with one or two near the junction of the palatine and 

 pterygoid, and a few on the anterior half of the dentary. The large 

 posterior tooth is incurved and flattened, and has a thin blade with a 

 cutting edge posteriorly. The groove is fine if present. This arrange- 

 ment reminds of the characters of the genus Elaehistodoir Reinhdt., of 



■^ Americau Naturalist, 1893. p. 477. 



