514 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



Color. — Body a uniform orange-yellow, lighter in living speci- 

 mens and turning darker in preservatives. 



Female. — Head cylindrical, longer than the trunk, squarely trun- 

 cated anteriorly; no carapace. Trunk depressed, somewhat quadri- 

 lateral, with rounded corners and a reentrant posterior margin; 

 genital process on a level with the ventral surface. First antennae 

 3-segmented ; second antennae turned across the frontal margin ; sec- 

 ond maxillae completely fused and reduced so much as to often 

 appear obsolete; maxillipeds overlapping the other mouth parts. 

 Length of head, 5-7 mm. ; of trunk, 4-6 mm. ; of ovisacs, 6-10 mm. 



Figure 302. — Clavella uncinata: a. Female, Figure 303. — Clavella in- 



lateral; bj male, lateral soZita; Female, lateral 



Male. — Body ovoid, one-third longer than wide. First antennae 

 2-segmented; second antennae biramose, exopod 3-segmented, setose, 

 endopod 1-segmented, unarmed; mouth tube projecting diagonally 

 downward and forward ; first maxilla bipartite, the palp with a 

 single seta; second maxilla long and slender, with a short claw; 

 maxillipeds short and stout, with a strong apical claw; between the 

 maxillipeds on the midline is a short rounded process. Total length, 

 0.45-0.5 mm. 



Remarks. — This species may be distinguished from the other two 

 of ClaweUa here described by the presence of a genital process at the 

 posterior end of the trunk. It appears to have a decided preference 

 for gadoid fish. 



CLAVELLA INSOLITA WUaon 



FiGUBB 303 

 Clavella insolita Wilson, Proc. U. S. Nat. Mus., vol. 47, p. 676, pi. 46, 1915. 



Occurrence. — Taken from the pectoral fins of the snake blenny 

 {Lumpenus lampetraeformis) , captured at Woods Hole. 



Distribution. — Not found outside the present area. 



Color (preserved material). — Body dark cinnamon-brown, ovisacs 

 red. 



Female. — Head slender, cylindrical, squarely truncated anteriorly, 

 without a carapace. Trunk ellipsoidal, one-third shorter than the 



