NATURAL SCIENCES OP PHILADELPHIA. 261 



The plates of the head and chin are of a deeper tint, possibly red in life. 

 Parts of the post-ocular and sixth and seventh superior labials, the whole of 

 the eighth labial and the temporals, are covered by a black spot on each side, 

 which unites upon the nape of the neck with that of the opposite side. One 

 specimen, locality and donor unknown. 



141. 0. cloelia Gthr. Coluber cloelia Daudin. Clelia Daudinii Fitz. 

 1826. Cloelia occipitalis Wagl. 1S30. Deiropeda cloelia Fitz, 1843. Bra- 

 chyruton cloelia Dum, & Bibr. 1853. 



Var. The black bands occasionally dividing, alternating and becoming con- 

 fluent on the back. The loreal plate entering the orbit. 

 One half grown spec. Is. of Panama. Drs. Gallaer and LeConte. 



144. 0. trigeminus Dum. cj- Bibr. vii. 1013. Lycodon fo rmosus Schl. 

 One sp. Bahia. Gard. Plants in ex. 

 One ". S.America. Dr. Wilson, (Bp, Coll. pres. by Dr. DeKay.) 



LYCODONTINJE. 

 Boodon Dum. & Bibr. Type B. unicolor. 

 Erpetologie Generale, vii. p. 357, 1854. 



145. B. virgatus nobis. Coelopeltis virgata Hallowell, Proc. Acad. Nat. 

 Sci. vii. p, 98, 1854. Boodon nigrum Fischer, Abhandl. aus dem Gebiete der 

 Naturwissensch. Hamburg, iii. 91, 1856. ? Boodon capense A. Dumeril, Rev. 

 et Mag. de Zoologie 1856, 464. Boodon quadrivirgatum Hallow. Proc. Phila. 

 Acad. 1857, p. 56. 



Four sp. Gaboon. Dr. Ford. 



One " Liberia. Mr. E. T. Cresson. 



Our specimens correspond exactly with the description of Dr. J. G. Fischer, 

 so that we have no doubt as to their belonging to the same species. Prof. 

 Dumeril loc. sup. cit. identifies the Coelopeltis v i r g a t a of Hallowell with 

 the Booden capensis D. &. B., and there is a possibility that the specimen 

 received by him from the Acad. Mus. belongs to the latter species. Our speci- 

 mens, however, presented by Dr. Ford, and subsequently described by Dr. Hal- 

 lowell as B. quadrivirgatum, and stated by him to be identical with his 

 0. virgata, cannot be identified with the B. capense. The former has 

 twenty one and twenty-three longitudinal rows of scales, the later twenty -nine 

 or thirty-one. 



146. B. quadrivittatus Hallowell, Proc. Acad. Phila. 1857, p. 54. 

 One sp. Isles de Los (off Sierra Leon.) Dr. Burtt, U. S. N. 



A fine species, resembling probably the Capense, but with twenty seven 

 rows of scales and a different disposition of the bands on the muzzle. 



Lycophidion Fitz. Type L. Horstokii. 

 Syst. der. Rept. p. 27. 



147. L. laterale Hallowell, Proc. Acad. Nat. Sci. 1857, p. 58. 



A Lycophidion with the coloration of a Boodon. The pupil is round ; the 

 anterior nasal plate almost reaches the edge of the lip, and wants but little 

 of meeting its fellow over the rostral. 



One sp. Gaboon. Dr. H. A. Ford. 



I860.] 



