102 FIELD COLUMBIAN MUSKUM ZOOLOGY, VOL. III. 



This species deposits its young the latter part .of May. Ocot- 

 lan; La Pal ma; La Barca: Patzcuaro. 



KEY TO THK SPECIES OF GOODEA. 



a. Dorsal fin slightly behind ventral; distance from base of 

 caudal to origin of dorsal 2 in distance from origin of dorsal to anter- 

 ior margin of orbit. 



/'. Body slender, its depth 33 in length of body; scales 37 to 



40-13. D. 12: A. 13. ATKII'INMS. 



/;/'. Body deep, its depth 3 in length of body; scales 37-14; D. 



13: A. 14. CAL1KNTK. 



ttti. Dorsal fin slightly in advance of anal, distance from base of 

 caudal to origin of dorsal ii (small specimens), i| (in larger speci- 

 mens) in distance from origin of dorsal to the tip of the snout; 

 scales 41-16; D. 13; A. 14. Lurn'oi.ni. 



SKIFFIA, gen. nov. 



Type Icniuc. 



Body compressed, deep: dorsal in advance of anal, its middle 

 over origin of anal; origin of dorsal fin midway between base of cau- 

 dal and eye: teeth loose, outer series large, bicuspid, behind which 

 are small villiform teeth. Alimentary canal elongate, its length 2 to 

 3 times the total length of the body; peritoneum black: gill-rakers 

 long, rather stiff, about 20 on the first arch; vertebra? 16-1-18 34. A 

 group of small fishes with compressed bodies and a short distended 

 abdominal region. I have placed Caraclwdon bilineatus Bean in this 

 genus. It has an alimentary canal a little more than twice the total 

 length of the body. The teeth are bicuspid and loose, though scarcely 

 as much so as in the other three species. The alimentary canal is 

 elongate though less so than in the other species. It is possibly 

 deserving of sub-generic rank, but our material is too scant to warrant 

 any such disposition of it being made at present. This genus is 

 named for Mr. F. J. V. Skill, Director of the Field Columbian 

 Museum. 



Skiffia lermae, sp. nov. 



Type, No. 3616. F. C. M. Length. 2.05 inches. 

 Locality, Lago de Patzcuaro, Patzcuaro, Michoacan, Mexico. 

 Head 4; depth 2g to 3^: D. 13: A. 14: scales 37-14. Body 

 deep, much compresseJ: head small; snout pointed: mouth small; 



