400 



1. Themistella fusca (Dana, 1852) (Fig. 173) 



Dana, 1852: 983 (Lestrigonus); Bate, 1862: 291; Bovallius, 1887a: 

 20 (Hyperiella); Bowman, 1973: 67. — steenstrupi Bovallius, 1887a: 23; 

 1889: ?>\3.—thoracica Vosseler, 1901: 73 (Hyperia). 



Length of males 4 mm. 



The anterior part of the body is very short; the head and the pereon 

 together are shorter than the pleon. The somites of the pleon are very 

 large. The integument is thin and transparent. The anterior part of the 

 head is flat and the lower part rounded. 



Antennae I in males exceed the length of the head, pereon, and pleon 

 together; the 1st segment of the peduncle is thick and longer than the 

 next two segments together; the conical 1st segment of the flagellum is 

 the same length as the entire peduncle; the number of segments in the 

 flagellum exceeds 20. Antennae II are somewhat longer than the entire 

 body of the crustacean; the number of segments in the flagellum reaches 

 21. Antennae I in females are equal to the head in length. 



pip Mi (/\ 



Fig. 173. Themistella fusca (Dana), female (after Bowman, 1973). 



