COPEPODS OF THE WOODS HOLE REGION" 



515 



head, with a row of shallow transverse grooves along either side of the 

 midline on the ventral surface ; genital process not showing externally, 

 but outlined inside the skin. First antennae 3-segmented ; second an- 

 tennae uniramose; first maxilla bipartite at its tip, with a minute 

 palp bearing a single seta; second maxillae fused for their entire 

 length; maxillipeds removed from the mouth tube far enough not 

 to overlap the other mouth parts. Length of head, 3 mm. ; of trunk, 

 2.1 mm. 



Male. — Unknown. 



Remarhs. — The host of this parasite is rare within the present 

 area, and this will account for the limited number of specimens 

 found. 



CLAVELLA PINGUIS Wilson 



Figure 304 

 Clavella pinguis Wilson, Proe. U. S. Nat. Mus., vol. 47, p. 678, pi. 47, 1915. 



Occurrence. — Taken from the pectoral fins of an eelpout {Lyco- 

 des frigidus)^ captured in deep water southeast of Nantucket, Island. 



Distribution. — New Jersey coast, Nova Scotia coast (Wilson). 



Color (preserved material). — Body a deep brownish yellow; eggs 

 orange. 



Female. — Head slender, cylindrical, a little longer than the trunk, 

 without a dorsal carapace. Trunk elongate, elliptical, three times 

 as long as wide, without a 

 genital process. First anten- 

 nae indistinctly 2-segmented; 

 second antennae uniramose, 

 turned across the frontal mar- 

 gin; first maxilla tripartite, 

 palp short with a single seta ; 

 second maxillae short, com- 

 pletely fused and tapered; 

 apical claw of maxillipeds 

 with a spine on the inner mar- 

 gin near the tip. Length of 

 head, 4 mm. ; of trunk, 3.5 

 mm.; of ovisacs, 3.5 mm. 



Male. — Body egg-shaped, 

 widest posteriorly ; mouth 

 tube long and directed forward in line with body axis. First an- 

 tennae widely separated, 2-segmented; second antennae biramose, 

 rami 1-segmented; first maxilla bipartite, without a palp; second 

 maxillae and maxillipeds short and stout, with strong terminal 

 claws. Length, 0.4 mm. 



Figure 304. — Clavella pinguis: a. Female, lat- 

 eral ; b, male, lateral 



