NO. 9 MARINE INVERTEBRATES, ALASKA — MacGINITIE 1 59 



which are about 0.8 mm. long, are bright maroon. This species builds 

 mud tubes in colonies, the tubes of adults being about 50 mm. long 

 and 12 mm. wide with no constriction at the opening. Any one haul 

 may bring up both large and small individuals, from 5 to 19 mm., 

 for example. The Point Barrow specimens form the first record from 

 the western Arctic. 



Haploops laevis Hoek was present, and occasionally abundant, in 

 hauls from 118 to 741 feet. The body is whitish and the small eyes 

 are a bright cerise, which fades out completely in preservative. Below 

 each eye and slightly anterior to it is a cerise spot that at first glance 

 resembles another eye. There are no black pigment spots around the 

 eyes as in Byblis gaimardii. The eggs are clear with a small orange- 

 red spot at the pointed end and a larger orange-red spot toward one 

 side and the larger end. Haploops laevis also builds mud tubes in 

 colonies. The tubes of adult animals are about 50 mm. long and 12 

 mm. in diameter and are sometimes constricted at the top. In one 

 dredge haul made through the ice on February 18, 1950, 14 specimens 

 from 3 to 19 mm. in length were collected. This species is new to 

 Arctic America. 



Pontoporeia femorata Kroyer was taken at 477 and 741 feet where 

 the bottom is characterized by a mud softer than that of the mud 

 zone. Forty-eight specimens were picked up from the beach from 

 September 22 to 26, 1949. This species is oyster white with whitish, 

 opaque eyes, more suggestive of tumors than eyes, that sometimes 

 have pink spots scattered over the surface. The eggs are salmon- 

 colored. This is abundant in Iceland (Stephensen, 1940a). It is new 

 to Alaska and the western Arctic. 



A few specimens of Gitanopsis arcfica Sars, a small species with 

 a creamy-white body and round brown eyes, not previously reported 

 from Alaska and the western Arctic, were taken at 125, 175, and 216 

 feet. 



Thirty specimens of Acanthonotosoma inflatum (Kroyer), a small 

 white species with tan showing through, and with round brown eyes, 

 were taken from 1 50 to 420 feet. 



Eight species of Metopa, one of which was new and the other seven 

 of which were new to Alaska, were collected: M. clypeata (Kroyer), 

 50 specimens from Eluitkak Pass and depths of 120 to 477 feet; 

 M. glacialis (Kroyer), 4 specimens from 477 feet; M. bruzeli (Goes), 

 16 specimens from 80 to 453 feet; M. longicornis Boeck, 34 specimens 

 from 60 to 295 feet ; M. spinicoxa Shoemaker, n. sp., 52 specimens 

 from 60 to 184 feet; M. tenuimana Sars, 11 specimens from 80 to 



