16 



U.S. NATIONAL MUSEUM BULLETIN 278 



Figure 5. — Aeginina longicornis, female; a, lateral view; h, gnathopod 2; c, gnathopod 1; 



d, abdomen.^ 



and total length. It is evident that pereonites 1 and 2 of both males 

 and females increase in length at approximately the same rate. There- 

 fore the statement made by many authors that pereonites 1 and 2 

 are elongated in males seems to be invahd. 



Distribution. — Type-locality: Near Frederikskab, Greenland, at a 

 depth of 22-29 m. 



Other records: Siberian Polar Sea to 140° E.; Kara Sea; Novaya 

 Zemlya; Franz Josef Land; Spitsbergen; Murmansk; Barents Sea; 

 Norway; Denmark; Faeroe Islands; Shetland Islands; Jan Mayen; 

 Iceland; eastern and western coasts of Greenland; Bafl&n Bay; east 

 coast of North America from Newfoundland to Oregon Inlet, North 

 CaroUna. 



New records: No records are available which extend the range of 

 this species. 



Remarks. — This Arctic species is quite common in the northern 

 parts of eastern North America. It is generally found in deeper water 

 (to 2258 m) but has been collected frequently in shallow water. The 

 habitat does not seem to be specific because it has been collected 

 from green, red, and brown algae; sea grass; hydroids; bryozoans; 

 and from the gut of the sea bass, Centropristis. 



The seasonal distribution of ovigerous females is illustrated in 

 figure 7. The largest number of samples containing ovigerous fe- 



