250 FISHES FJiOM COMMANDER ISLANDS— BEAX AND BE AX. 



PLEURONECTES STELLATUS. Pallas. 



Xo. 33842, U.S.N.M. (1G42). Bering Island, September, 18S2, L. 

 Stejneger. 



GASTEROSTEUS CATAPHRACTUS (Pallas), Jordan and Gilbert. 



No. 338(57, U.S.N.M. (1027). Berin-i' Island, May 10, 1882, L. SteJ- 

 neger. Fifteen specimens. 



No. 338G0, IT.S.N.M. (1050). Bering Island, May 15, 1882, L. SteJ- 

 neger. Length of specimen, 71 mm. 



D. II, 1, 14 ; A. I, 9 ; P. 10. Lateral plates, 34. The ventrals extend 

 to the end of the pubic bone. The upper and lower pectoral rays are 

 slightly longer than the middle rays, so that the fin when naturally 

 ex]iauded shows a slightly concave posterior margin. The caudal keel 

 is well developed. The ventral spines are strongly serrated on their 

 upper edge and rough along the lower margin with some strong serra- 

 tions at the base. 



No. 38954, U.S.N.M. Bering Island, N. Grebnitski. Four speci- 

 mens, ranging from 71 to 80 mm. in length. 



GASTEROSTEUS MICROCEPHALUS, Girard. 



No. 33853, U.S.N.M. (1372). Saranna Lake, Bering Island, July 17, 

 1882, L. Stejneger. Three specimens, the two larger 90 nun., tlie 

 smallest 50 mm. long. 



D. II, I, 11; A. I, 8. There are eight plates developed on each side; 

 the first two small, the last reaching to or slightly beyond the end of 

 the extended pectoral. 



In general appearance this species resembles cataphr actus with the 

 posterior i)ortion of the body naked. 



No. 38955, U.S.N.]\I. Bering Island, N. Grebnitski. One specimen, 

 70 mm. long. This is a very short-bodied individual, its depth equal- 

 ing two sevenths of the length without caudal. It has only foui- large 

 lateral plates developed and two or three rudiments. 



Four additional examples were obtained here. 



No. 38952, U.S.N.M. (1337). Bering Island, July 28, 1882, L. Stej- 

 neger. "From fresh- water pond behind the new cemetery." 



Seven specimens, ycmng, the largest being but 18 mm. long; one with 

 three dorsal spines. The lateral plates on some of the examples are not 

 developed, but there is little doubt that these belong to microcephaUis. 



No. 39430, U.S.N.M. Bering Island, N. Grebnitski. Two specimens, 

 the larger 80 and the smaller G5 mm. long. The former has eight plates 

 developed, the eighth being just behind the end of the extended pec- 

 toral ; the anterior three are very small. The ventrals do not reach to 

 the end of the pubic bone. D. II, I, 12; A. I, 9. 



The smaller example has one more plate developed on the left side 

 than on the right. 



