188 TROCEEDINGS OF THE NATIONAL MUSEUM vol.85 



PHALLOCOTTUS OBTUSUS, new species 



FiGUBE 70 



Holotype. — A male specimen 61 mm long to base of rays of caudal 

 fin, collected in a beach seine at Igitkin Island (Aleutian Islands), 

 Alaska, xViigiist 9, 1937, by Victor B. Scheffer, original number 

 V. B. S. 109, U.S.N.M. no. 105280. Five paratypes were collected 

 along with the liolotype, U.S.N.M. no. 105281. 



Description (based on the holotype and five paratypes). — The 

 counts and measurements of the holotype are given outside the paren- 

 theses and those for each paratype, respectively^, are enclosed in the 

 parentheses. All measurements are expressed in hundredths of the 

 standard length. The last two soft rays of dorsal and anal fins, often 

 branching from a common base, were counted as one ray. 



Dorsal fin rays XI, 24 (XI, 22; XII, 2^; XI, 22; XII, 22; XI, 23) ; 

 anal fin rays 24 (23, 22, 22, 22, 23) ; pectoral fin rays 15-15 in all 

 specimens; principal caudal rays II (12, 12, 12, 12, 12) ; number of 

 pores in the lateral line 48 (48, 48, 49, 48, 48) ; length from tip of 

 snout to base of midcaudal fin rays 61 (53.3, 53, 50.5, 51.2, 47.4) mm; 

 sex $ ( 5 , 5 , 5 , ^ , $ ) ; greatest depth of body 24.6 (23.6, 27.4, 

 21.0, 23.2, 23.2); length of head 26.8 (28.1, 29.2,^28.7, 26.4, 27.8); 

 length of snout 8.2 (8.5, 8.1, 8.9, 8.2, 8.0) ; length of longest soft dorsal 

 ray 12.3 (11.3, 11.3, 13.8, 12.1, 12.5) ; length of longest spinous dorsal 

 ray 19.7 (19.7, 12.1, 18.2, 15.2, 11.4) ; length of longest anal fin ray 

 12.4 (12.4, 10.9, 11.1, 10.7, 9.1) ; length of longest pectoral fin ray 22.0 

 (24.4, 23.8, 24.6, 24.0, 26.0) ; length of longest caudal fin ray 16.7 (16.9, 



17.0, 16.4, 17.8, 17.9) ; length of longest pelvic fin ray 14.5 (15.0, 9.4, 

 15.2, 14.6, 9.7) ; interorbital space 9.4 (9.4, 9.3, 9.9, 9.9, 9.7) ; length of 

 maxillaries 11.1 (12.7, 12.1, 11.3, 11.7, 11.4) ; least depth of caudal 

 peduncle 6.5 (6.6, 6.6, 6.3, 7.2, 7.0) ; length of caudal peduncle or the 

 distance from the posterior edge of the base of the last anal fin ray 

 to the base of the midcaudal fin rays 12.3 (14.1, 13.2, 12.7, 15.0, 13.3) ; 

 diameter of eye 6.5 (6.8, 7.5, 7.5, 7.4, 7.2) ; distance from tip of snout 

 to origin of anal fin 46.0 (47.0, 52.8, 46.4, 46.3, 47.6) ; distance from 

 tip of snout to origin of spiny dorsal 28.0 (28.1, 26.4, 27.4, 25.4, 27.0) ; 

 distance from tip of snout to insertion of pelvic fins 29.5 (30.0, 35.8, 



30.1, 32.0, 35.2) ; distance from tip of snout to middle of vent or 

 midbase of anal papillae 36.2 (34.1, 39.6, 34.3, 38.3, 38.2). 



Gill membranes broadly joined to each other, forming a broad free 

 fold across the isthmus; preopercular spine at upper angle of the 

 bone short, blunt, or rounded, not hooked upward as in Sigmistes; 

 interorbital space wide, slightly convex; nasal spines concealed, not 

 at all projecting; small sharp teeth present in bands on jaws and 

 vomer, none on palatines; body compressed, deep; skin smooth; lat- 



