l66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I28 



About 25 specimens, mostly immature, of Thysanoessa longipes 

 Brandt were washed ashore and 2 specimens were taken in a plankton 

 tow near shore on July 20, 1950. 



Four specimens of Thysanoessa inermis (Kroyer) were taken from 

 the gullet of a Sabine's gull at Elson Lagoon on August 26, 1950, and 

 one was taken in a plankton tow on July 20, 1950. This is the first 

 record from the western Arctic. 



Order DECAPODA 



A total of 21 species of decapods — 2 hermit crabs, 3 true crabs, and 

 16 shrimps (9 genera) — were collected. These were obtained by 

 dredging only, for no special techniques or nets adapted to the taking 

 of shrimps were used. I am indebted to Dr. Fenner A. Chace, Jr., 

 for identifying a representative lot of decapods, and to my wife, 

 Nettie MacGinitie, for identifying subsequent collections. 



It is worthy of mention that all but four species of the decapods 

 were a combination of red and white. One of the four species was 

 chiefly an olive tan, one was a black-and-white mixture, and two were 

 predominantly translucent green. At least at certain seasons of the 

 year, even these two latter species had red markings. At the depth 

 at which these decapods occur, the red color would be screened out 

 and these red-and-white decapods would appear as black and white. 



A single male specimen of Pandalus borealis Kroyer was collected 

 on September 9, 1948, at no feet. This species is very common in 

 Iceland, where it forms an important part of the food of the cod. 

 Its wide distribution in cold north Atlantic waters, Spitsbergen, the 

 Barents and Kara Seas, and the east coast of North America, to- 

 gether with the fact that the shrimp is not a littoral species, suggests 

 strongly that collecting methods adapted to the taking of shrimps 

 would show this species to be common at Point Barrow. 



Eight specimens of Spirontocaris arcuata Rathbun, ranging in 

 length from 38 to 54 mm., were dredged from six stations from no 

 to 453 feet. The usual color of this animal is a mixture of red with 

 chalk white and translucent white, but specimens in which the entire 

 carapace is chalk white and the abdomen and appendages are entirely 

 red are also found. 



Ten specimens of Spirontocaris phippsi (Kroyer) were taken from 

 five stations from 125 to 217 feet. They ranged in length from 19 to 

 35.5 mm., exclusive of the rostrum. One of the males was parasitized 

 by Phryxus abdominalis. This species is a mixture of red and chalk 

 white. The eggs are green. 



