242 PROCEEDINGS OP THE ACADEMY OF 



anterior, which is very small. No loral. Preocular one, post-oculars two. 

 Sixth upper labial touching the occipital, which latter is separated from the 

 posterior labials by a single plate. Anal and urosteges entire. Scales smooth. 



84. P. plumbeatra nobis. Seven superior labials, eye over third and 

 fourth ; the first as large as the postnasal, the last three very large. Preocular 

 small. Rostral small, rather prominent. Vertical presenting an obtuse angle 

 in front, its lateral borders parallel and equal in length to the latero-posterior. 

 Occipitals elongate acute, their divaricating tips separated by a small plate. 

 Exteriorly they are bordered by one temporal and the sixth upper labial. In- 

 ferior labials seven. Geneials two pair, the anterior broader in front, and one- 

 third longer than the posterior. Scales in fifteen longitudinal rows, very 

 smooth. Gastrosteges 140, an anal, urosteges 44. Total length 16 in. 8 lines: 

 tail 2 in. 9 1. 



Color above a uniform blackish lead color, paler on the head. Chin and 

 belly yellowish, the inferior labials and gastrosteges tipped with the color of 

 the back, the latter posteriorly spotted with the same. Under surface of tail 

 grey. 



One specimen of this interesting serpent is in the Museum of the Academy, 

 presented by Mr. E. T. Cresson, a gentleman to whom we are also in- 

 debted for fine specimens of Boodon virgatum, Drjiopbis Kirtlandii, 

 Boiga pulverulent a, etc. The Pariaspis is a native of Liberia, in the same 

 zoological district with the Holuropholis, Dipsadoboa, Brachycranion, etc., 

 which it represents in this group. 



Stenorhina Dam. & Bibr. Type S. ventralis. 

 Erpetologie Generale, vii. p. 865, 1853. 



85. S. Kennicottiana nobis. Form stout, thick, the head not distinct. 

 Muzzle acute. Number of rows of scales and head shields as in S. v e n t r a 1 i s, 

 except that there are eight inferior labials instead of seven, the fourth being 

 the largest instead of the third. The anterior geneial plates are more elongate, 

 the length being twice the breadth, and the posterior are more produced, and 

 are separated by a narrow intercalary shield. The postnasal is very large, and 

 is joined to the preocular by a suture half the length of the latter. Tail one- 

 fifth of the total length. Gastrosteges 155 ; one divided anal ; urosteges 39 pair. 

 Total length 22 in. 3 1. ; tail 4 in. 5 1. 



Coloration. Above brown, the body crossed by thirty-six deep brown or 

 black bands. These are irregular and very narrow, not wholly involving any 

 scale which they cross. On the flanks they are interrupted and irregular. 

 Chin, belly and under surface of the tail yellow, with an irregular medial line 

 formed by adjacent spots near their extremities. Superior labials yellow, the 

 sixth and seventh bordered above with black. Top of the head uniform brown. 

 One sp. Isthmus of Panama. Drs. Gallaer and LeConte. 



This species is dedicated to Mr. Robert Kennicott of Washington, a gentle- 

 man possessing a knowledge of North American Serpents not excelled by any 

 other naturalist. 



86. S. ? 



We have before us two specimens of the young of what is probably an under- 

 scribed species of Stenorhina. Their immature age is indicated by the division 

 of several of the gastrosteges upon the umbilical region. In both specimens 

 the tail is only one-eighth of the total length, in the ventralis a little more 

 than one-fifth. The scales in the latter are relatively larger, and the vertical 

 plate a little broader. In a specimen of the former, from Veragua, the gastros- 

 teges number 165, urosteges 35 ; in the second, collected by Dr. Sartorius in 

 the hills west of Vera Cruz, and in the possession of the Smithsonian Institute, 

 they are 155x 3 2. In the ventralis the Erp. Gen. gives 149x44. The 



[June, 



