171 



Scales. Xone on the head. Body closely covered with small, par- 

 tially imbedded cycloid scales, irregularly arranged. 



Lateral line absent. 



Nostrils double. Anterior tubular and standing out from the end of 

 the snout. 



Stomach well defined, ccecal. 



Pyloric appendages present. 



Intestine with two turns. 



Amis situated under the throat and forward of the pectorals. 



Ovary single. (Placed by the side of the stomach in Amblyopsis 

 and Typhlichthys and behind it in Chologaster.) 



Viviparous. (Amblyopsis.) 



Testes paired. (Amblyopsis.) 



Air bladder with pneumatic duct. (Amblyopsis.) 



Liver with the left lobe very large and partially enclosing the 

 stomach. 



Amblyopsis Df.Kay, Fishes of New York, p. 187, 1842. 



^ rudimentary and imbedded under the skin. 



Head with numerous transverse and longitudinal rows of sensitive 

 papillae provided with nerve branches, many of the nerve branches 

 terminating as free filaments outside the papillae. Small granula- 

 tions on the spaces between the papillary ridges. Canals under the 

 skin. 



Teeth minute, curved, and arranged in rows on the intermaxillary, 

 inferior maxillary and palatine bones. 



Body with a prominent papilla just over the opercular opening, at 

 the base of a small papillary ridge similar to those on the head. 

 Papillary ridges on sides of body of same character as those on the 

 head, and arranged at nearly equal distances from opercular opening 

 to base of caudal tin. 



Pyloric appendages, one on each side. 



Ovary situated on the right side of the stomach. 



Fins. Yentrals small and placed near the anal fin. Dorsal, 9. 

 Anal. 9. Pectoral, 11. Ventral, -i. Caudal, 2i. 



Arnblyopsis spelseus DeKat. Large Blixdfish. 



Craige, Procd. Acad. Nat. Sci. Philad., i. p. IT."). 1842. DeKay, Pishes X. T., p. 



r_>. WTMAN, Amer. Jour. Sci., xlv, p. 94, 1843; Ann. Mag. Nat. Hist., xii, p. 



1843. Thompson-, Ann. Mag. Nat. Hist., xiii, p. Ill, 1844. Tellkampf, Miil- 



Arch. f. Anat., p. 392, 1844; X. Y. Jour. Medicine, v. p. 84, with plate, giving 



three figs, of the fish ; position of internal organs; brain; stomach; air bladder; 



(profile view gives the fish without ventral fins, but ventral view shows them), 1845. 



Stoker. Synopsis N". A. Fish, p. 435, 1846. Owex, Lect. Comp. Anat. Fishes, pp. 



