SYNOPSIS OF THE FAMILY HETEROPYGII. 59 



slightly different proportion and shape. (Stomach not so pointed 

 behind as in Amblyopsis.) 



Ovary situated on right side of stomach, as in Amblyopsis. (Eggs 

 fewer in number and proportionately larger than in Amblyopsis.) 



Fins. Ventrals absent. Dorsal, 7 or 8; Anal, 7 or 8 ; Pectoral, 12; 

 Caudal 24. (This formula is given after counting several specimens. 

 Girard gives, D. 7; A. 8; P. 11; 0.23.) 



It will be noticed that the only characters separating this genus 

 from Amblyopsis are the absence of ventral fins, the shape of the 

 stomach and pyloric appendages, and larger eggs in less number. 



Typhlichthys subterraneus GIKAKD. SMALL BLINDFISH. 



GIRARD, Procd. Acad. Nat. Sci. Philad., p. 63, 1859. GUNTHER, Cat. Fish Brit. 

 Museum, vii, p. 2, 1868 (as a syn. of Amblyopsis). PUTXAM, Amer. Nat., vi, p. 20 

 et seq., with figs., Jan.., 1872. 



PLATE 2 (Amer. Nat., Vol. vi., Jan., 1872). FIG. 3, slightly more than natural size; 

 3a, stomach and pyloric appendages, twice nat. size ; 36, scale, magnified (nat. 

 size represented by small outline over the figure). 



Proportions and general appearance, want of color, arrangement of 

 papillary ridges, position and shape of fins as in Amblyopsis spela3us, 

 with the exception that, owing to the jaws being more obtusely round- 

 ed, the head is slightly blunter and broader forward. 



Membrane of caudal quite prominent and extending forwards to pos- 

 terior base of dorsal and anal fins. 



Scales broader than long. Large quadrangular centre with from 6 

 to 8 concentric lines reduced in number and broken up on anterior 

 margin. Posterior portion with numerous radiating furrows. 



Measurements. Largest specimen, 1-85 inches in total length. 

 Smallest specimen, 1*45 inches in total length. 



Geographical distribution. Subterranean streams in Kentucky, Ten- 

 nessee and Alabama. 



Specimens examined : 



MUSEUM OF COMPARATIVE ZOOLOGY. 



7 specimens. No. 780. c? $. Adults. Mammoth Cave. Collected and pre- 

 sented by Alpheus Hyatt, Sept., 1859. 



1 specimen. No. 781. Moulton, Alabama. Presented by Thomas Peters. 

 1 specimen. No. 782. Lebanon, Tennessee. Presented by J. M. Safford. 



Other specimens. Dr. Girard described the species from a specimen 

 in the Smithsonian Institution, taken from a well near Bowling Green, 

 Ky. Dr. Gunther mentions a specimen, in the British Museum, from 

 the Mammoth Cave. 



Habits. Nothing is known concerning the habits of this fish. It is 

 evidently much rarer at the Mammoth Cave than the large species, to 

 judge from the small number in collections. The fact that Mr. Hyatt 

 obtained seven specimens when he was at the cave in September and 

 did not get any of the other species, may indicate some peculiar loca- 



