292 REPORT OF STATE GEOLOGIST. 



Forbes (i4) No. 6, G8) found that his specimens had eaten only 

 animal food, one-fourth of it consisting of fishes; larvse of aquatic insects 

 and isopod crustaceans constituted the rest.* 



'•'CoTTUs poi/LiCARis (J. and G.). 



Uranidea poUicnrin, Jordan and Gilbert, 1882, 5, 954. 



Body heavy forwards. Depth in the length, about four and one-half. Head broad and 

 depressed, the snout narrow. The opercular spines rather large and directed upward. No 

 palatine teeth. Dorsal VII, 19; anal rays, 13; ventrals said to be I, 3. Olive, with splotches 

 and spots of brown. Fins barred with dusky. Eyes small. Length four and one-half 

 inches. 



Lake Michigan; taken at Racine, Wisconsin. Not known from Indiana waters. 



COTTUS HOYi Putnam. 



Uranidea lioyi, Jordan and Gilbert, 1882, 8, 699. 



Form slender. Head narrow and pointed, convex above. Eyes not so much directed 

 upward as in the other species ; the interorbital space narrow, seven or eight in the length 

 of the head. Jaws about equal. Opercular spine slender, directed backward ; smaller one 

 below it. No palatine teeth. Dorsal rays VI, 15; anal rays 11. Color olivaceous, barred 

 and speckled with darker. Length about two inches. Upper surface of the male prickly. 



Lake Michigan, in deep water ofif Racine and Milwaukee. Has not yet been taken in In- 

 diana waters. Dr. .Jordan states {2, 988) that only two specimens of this species were known 

 at the time of writing. Probably no others have since been taken. The female taken June 

 4, 1875, twelve miles off Racine, was so distended with eggs that the depth of the body was a 

 third the length. 



COTTUS SPILOTUS (Cope). 



Uranidea spilota, Jordan and Gilbert, 1882, ,S, 954, not of 694. 



This species has been described from Grand Rapids, Michigan. It may be looked for in 

 Northern Indiana. It is most closely related to C. pollicaris. The length of head is con- 

 tained in the length of the fish three and one-third times. Depth in length five times. The 

 eye is said to be larger than in G.pollioaris, four and one-half instead of five and one-third 

 times. The preopercular spine is like that of the last mentioned species. The color is olive 

 above, closely speckled with darker; the sides somewhat barred. Belly pale. Length about 

 three inches. 



Genus TRIGLOPSIS Girard. 



Form of head and body rather slender. Slit behind the last gill evident. Gill-mem- 

 branes not quite free from the isthmus and forming a broad fold across it. No palatine 

 teeth. Preopercular spine straight. 



Triglopsis thompsoni Girard. 



Jordan and Gilbert, 1882, S, 709. 



Body elongated. Depth in the length six times. Head long, but of moderate width; 

 contained in the length three and one-third times ; its width in the length of the fish four 

 and one-half to five and one-half times; flat or concave above; behind the eye turning 

 down with an evident angle. Snout long, three and one-half in the head. Eye in head 

 four. Mouth very large, the maxillary reaching back to the hinder border of the pupil. 

 Opercle with four sharp and nearly straight spines; the uppermost directed backward, the 

 others downward. Bones of the head cavernous. Dorsal rays VII, 18; anal rays 15. Skin 

 smooth. Color olivaceous, with blotches of darker. 



Lakes Michigan and Ontario, in deep water. 



Specimens of this fish have been secured by opening the stomachs of the ling {Lota lota"!, 

 and are always more or less digested. 



