1916.] NATURAL SCIENCES OF PHILADELPHIA. |'_" | 



of dorsal and anal naked, also breast and median line of belly. No 

 lateral line. 



Dorsal inserted slightly nearer caudal base than gill-opening, 

 depressed fin not quite reaching caudal base. Anal origin opposite 

 base of first branched dorsal ray, depressed fin reaching :,' to caudal 

 base. Caudal moderately convex behind. Pectoral broad, rounded. 

 If to anal. Vent close before anal. 



Color in alcohol largely uniform brownish with olive tinge, under 

 surface paler or whitish. Fins all brownish, uniform. Iris brownish. 



Length 153 mm. 



Type, No. 21,920, A. N. S. P. Taken from a Permo snake from 

 La Paz, Bolivia. 1876-77. Prof. J. Orton. From E. D. Cope. 



Only the above example known. It is closely related, if not 

 identical, with 0. neveni Pellegrin, 6 but that species differs according 

 to its description in the following respects: Head 2\; depth 3; 

 D. 15; A. 17; P. 21; scales 32; conic teeth somewhat numerous; 

 dorsal inserted midway between gill-opening and caudal base; 

 pectoral 2| in head. It agrees, however, in having the scales uniform 

 and continuous each side of the median predorsal row, a character 

 by which both species differ from 0. albus Valenciennes. The 

 latter has a naked lengthwise area each side. 



(Cypho, hunchback; with reference to the predorsal keel.) 



CYPRINODONTIN.E. 

 Cyprinodon variegatus Lac6pede. 



C. gibbosus Baird and Girard, Proc. Acad. Nat. Sci. Phila., 1853, p. 390. 

 Indianola, Texas. 



No. 7,221, A. N. S. P. Cotype of C. gibbosus Baird and Girard. 

 Indianola, Texas. Coll. J. H. Clark. Smithsonian Institution (684). 



Besides the numerous local specimens also examined and recorded, 

 the collection contains others as follows: Connecticut (Noank); 

 North Carolina (Fort Macon); Florida (Miami, southwestern 

 region and Carrabelle); Alabama; Mississippi (Baldwin Lodge). 



Cyprinodon variegatus riverendi (Poey). 



Boca Chica and Marquesas Keys, Florida. 



Cyprinodon bovinus Baird and Girard. 



C. eximius Girard, Proc. Acad. Nat. Sci. Phila., 1859, p. 158. Chihuahua 

 River, Mexico. 



No. 7,223, A. N. S. P. Cotype of C. eximius Girard. Chihuahua 

 River, Mexico. Coll. Potts. Smithsonian Institution (No. 3, 501). 



'• Hull. Soc. Z. France, 1904, p. 9.5. Lake Titicaca. 



