THE FISHES OF BERING SEA. 443 



Family DAL,L,IID.<E. 



46. Dallia pectoralis Bean. Blackfish. 



Common in the rivers and swamps of Alaska; recorded by Dr. Gilbert from 

 Nushagak Eiver. Originally described from St. Michael. 



Family SYNAPHOBRANCHID^E. 



47. HlstiobranchuB bathybius (Guntber). 



Recorded by Dr. Gilbert from station 3308 in Bering Sea, 1,625 fathoms. 



Family NOTACANTHID^E. 



48. Macdonaldia challengeri (Vaillant). 



One specimen dredged at station 3308, west of the Pribilof Islands, in 1,625 

 fathoms. The type from off Tokio. 



Family AMMODYTID^4E. 



49. Ammodytes personatus Girard. (Ammodytes alaicamus Cope.) 



I^umerous specimens were taken at Bering Island. In six specimens the lateral 

 folds count 146 to 159, the dorsal fin 60 to 64, the anal 30 or 31. The single specimen 

 obtained at TJnalaska has 183 lateral folds, a number much larger than we have found 

 in any other individual. It agrees in this respect with the type of ^. alascanus, but 

 probably represents merely extreme variation in this direction. In this specimen the 

 dorsal rays are 61, the anal 31. It does not differ except in number of lateral fbld» 

 from specimens obtained hy the Albatross at Makushin Bay, TJnalaska, in 1890. In 

 eight of these the folds range in number from 145 to 159. In three specimens the 

 dorsal varies from 61 to 63 and the .anal from 30 to 32. Compared with specimens 

 from Puget Sound, the counts average slightly higher. In six individuals from the 

 Sound the dorsal has 58 or 59 rays, the anal 29 to 31. In one specimen the lateral 

 folds are but 136 in number, in the other five ranging from 144 to 158. In these counts 

 all of the folds are given, including the very short ones at the side of the nape. 



Dr, Bean records the species from many localities from Kadiak to Plover Bay. 



50. Rhynchias septipinnis (Pallas.) 



This species, which would seem from the description to be an Ammodytes with 

 ventral fins, has not been seen since the original description. It is not certain what 

 it is nor to what family it belongs. It has been made by Professor Gill, the type of a 

 distinct genus, Bhynchias. 



Family GASTEROSTEID^^. 



51. Gasterosteus cataphractua (Pallas). 



This species is distributed universally along all shores from Bering Sea south to 

 California. When strictly marine it exhibits little variation, but on becoming colo- 

 nized in fresh water it is subject to more or less important modifications, which are 

 mainly in the same direction, but occur in varying degrees in different localities. 

 Some of these colonies are strictly isolated and would receive recognition were it not that 

 they are extremely variable among themselves and that it seems impossible as yet to 



