NO. 9 MARINE INVERTEBRATES, ALASKA — MacGINITIE i6$ 



is whitish with gray-brown markings that turn reddish brown in 

 preservative. The large round eyes are reddish brown. One female 

 from 184 feet was carrying 15 eggs about 0.5 mm. in diameter. This 

 species is new to the western Arctic. 



Ericthonius hunteri (Bate) was one of the very abundant species 

 in hauls from 125 to 216 feet. It builds masses of mud-tube nests 

 several inches in height. The animals are gray with two bands of color 

 around the antennae and antennules: in the young these bands are 

 red and in larger specimens they are purplish brown. This is the first 

 record from Arctic America. 



Ericthonius tolli Briiggen, a colorful species that came from 125 

 to 477 feet, also lives in colonies of mud tubes. The body is dull 

 orange red and white and the flagellae of the antennae and antennules 

 are golden tan. Freshly deposited eggs are purplish pink. 



About seven specimens of the bizarre Dulichia spinosissima Kroyer 

 were taken from the beach or through the ice by means of screen traps 

 or dredging. One ovigerous female (March 10, 1950) was carrying 

 227 white eggs in about the morula stage. Five eggs that were meas- 

 ured averaged 522 microns in diameter. This species varies from 

 almost translucent white to pale tan. There is a band of reddish tan 

 at the distal end of the second and the basal end of the third joint of 

 the antennal and antennular peduncles. The whitish specimens have a 

 few minute chalk-white and reddish-tan specks scattered over the 

 body. The eyes are whitish with a little color toward the center. This 

 species is also new to the western Arctic. 



Dulichia arctica Murdoch and Dulichia porrecta (Bate) were also 

 collected sparingly up to depths of 184 and 213 feet, respectively. The 

 latter species has gray-brown markings on the body. The eggs are 

 white. 



Order EUPHAUSIACEA 



In view of the fact that the collection of planktonic organisms was 

 only incidental, it is not surprising that only three species of eu- 

 phausiids were found. The writer is indebted to Dr. Albert H. 

 Banner for identifying these (Banner, 1954). 



Eight specimens of Thysanoessa raschi (M. Sars) were taken in 

 plankton tows near shore, one washed ashore, and one was taken from 

 the stomach of a Sabine's gull. This is an Atlantic-Arctic-Pacific spe- 

 cies. At Bernard Harbor it was found in the stomachs of the seal 

 Phoca hispida and the fish Salvelinus malma (Schmitt, 1919). Dun- 

 bar (1942a) reported it from seal stomachs at Lake Harbor, eastern 

 Canada. 



