232 BULLETIN 180, UNITED STATES NATIONAL MUSEUM 



Vailima stevensoni Jordan and Se^vle, Bull. U. S. Bur. Fish., vol. 25 (1905), p, 

 398, fig. 87, 1906. 



51775 (type and 6 paratypes of Vailima stevensoni Jordan and Seale), Gasegase 

 River at Vaimosa near Apia, Samoa, Jordan and Kellogg. 



The failure of Jordan and Seale to refer their genus and species to 

 the Sicydinae is not understood by me. The characters given in the 

 key to the gobies clearly indicate the relationships of Vailima ste- 

 vensoni. 



Genus BATHYGOBIUS Bleaker 



BathygoMus Bleekeb, Arch. Neerl. Sci. Nat., vol. 13, p. 54, 1878. (Type, Oohius 

 petrophilus Bleeker.) 



BATHYGOBIUS CRASSICEPS (Jordan and Seale) 



Mapo crassiceps Jordan and Seale, Bull. U. S. Bur, Fish., vol. 25 (1905), p. 403, 

 fig. 92, 1906. 



116125, Tau Island, reef at Siulagi Point, June 27, 1939, 1 specimen. 

 116124, Tutuila Island, reef at Alofau, June 3, 1939, 6 specimens. 

 51777 (type and 4 co types of Mapo crassiceps Jordan and Seale), mouth of 

 Vaisigano River, Apia, Samoa, Jordan and Kellogg. 



BATHYGOBIUS FUSCUS SWAINSENSIS. new subspecies 

 Figure 18 



Holotype.—A male (U.S.N.M. No. 116117) 64 mm. in standard 

 length, collected on Swains Island in Lake Namo, a fresh-water (at 

 surface) lake, by Leonard P. Schultz, on May 5, 1939, along with 17 

 paratypes (U.S.N.M. No. 116118) 12.5 to 33.7 mm. in standard 

 length, bearing same data. The fresh-water lake has been cut off 

 from the sea for many years; however, Mr. Jennings' grandfather 

 said that there was a small outlet when he first arrived, but this is 

 now closed. Sea water spills into the lake when a severe hurricane 

 strikes the island, as occurred in January 1915 and again in 1936. 

 Saltwater fishes (barracuda) were fomid in the lake after the 1915 

 storm, but they soon died. 



Description. — (Based on the holotype and 17 paratypes listed 

 above. All measurements are recorded in hundredths of the stand- 

 ard length, 64 mm. (33.7 5 ; 32.2 9 mm.). Counts and measure- 

 ments for the holotype are given first followed by those for para- 

 types in parentheses, respectively.) Length of head 33.6 (31.2 

 33.0) ; greatest depth 18.0 (18.7; 23.4) ; diameter of eye 8.1 (8.9; 9.6) 

 distance from tip of snout to rear edge of maxillaries 14,8 (13.0 

 12.1) ; length of snout 9.7 (8.9; 8.4) ; postorbital length of head 19.1 

 (14.9; 15.8) ; least width of preorbital 2.8 (2.4; 2.5) ; length of caudal 

 peduncle 22.6 (24.4; 23.6) ; least depth of caudal peduncle 12.5 (12.8; 

 12.4) ; tip of snout to origin of dorsal fin 40.0 (37.7; 38.8) ; snout to 

 origin of anal fin 61.0 (61.0; 60.0) ; snout to anus 54.7 (52.6; 55.0) ; 



