174 



Typhlichthys Girakd, Procd. Acad. Nat. Sci. Philad., p. 63, 1859. 



Eyes rudimentary and imbedded under the skin. 



Head. The same arrangement of rows of sensitive papillae as in 

 Amblyopsis, and the spares between the papillae with granulations as 

 in that genus. (The subcutaneous canals probably exist, but have 

 not yet been made out.) 



Teeth, as in Amblyopsis, on the maxillaries and palatines. 



Body with papilla over opercular opening, and with the papillary 

 ridges on the sides as in Amblyopsis. 



Pyloric appendages one on each side as in Amblyopsis, but of 

 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; C. 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. 



Typblichthys subterraneus Girard. Small Blindfish. 



Girakd, Procd. Acad. Nat. Sci. Philad., p. 63, L859. Gl nther, Cat. Fish T'.rit. 

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

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



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

 3a, stomach and pyloric appendages, twice nat. size; 3b, 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 spelaeus, 

 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-S5 inches in total length. 

 Smallest specimen, 1*45 inches in total length. 



Geographical distribution. Subterranean streams in Kentucky, Ten- 

 nessee and Alabama. 



Specimens examined : — 



