676 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.47. 



Specific cTiaracters of male. — Body egg-shaped, quite pointed 

 anteriorly, no dorsal carapace; first antennae with a rudimentary 

 endopod and indistinctly jointed; endopod of second antennae also 

 rudimentary, exopod ending in two setae; mouth tube pointing 

 forward in line with the body axis and about twice the length of 

 the first antennae; first maxillae bipartite at the tip and without a 

 palp; second maxillae long and narrow, contrasting strongly with 

 the short and stocky maxillipeds. 



Color (preserved material), yellowish- white. 



Total length, 0.45 mm. Greatest width, 0.30 mm. 



(canaliculatus, grooved, alluding to the large groove down the 

 center of the back, into which the cephalo thorax fits.) 



Remarlcs. — The first antennae are partially, and the first maxillae 

 are entirely, hidden by the maxillipeds in the female, and it was 

 not considered advisable to mutilate the type-specimen for the sake 

 of getting at the first maxillae. The species is sufficiently distin- 

 guished by the deep dorsal groove and the wide and inclined genital 

 process of the female. 



CLAVELLA PARVA Wilson. 

 Clavella parva Wilson, 1912, p. 95, pi. 8, figa. 66 to 72. 



Host and record of specimens. — Ten females with egg strings were 

 obtained from the soft dorsal fin of the broAvn rockfish, Sehastodes 

 auriculatus, at Nanaimo, British Columbia. Six of the specimens 

 were selected as types of the species and numbered 39525, U.S.N.M. 



Remarlcs. — This species may be distinguished by its minute size, 

 and by the form of the first maxillae, wliich are bipartite at the tip, 

 each ramus ending in two setae, with a fifth seta on the outer margin; 

 palp short and ending in two setae. 



CLAVELLA ENSOLITA, new species. 

 Plate 46, figa. 152 and 153. 



Host and record of specimens. — Two females with egg strings were 

 obtained from the pectoral fin of Leptohlennius serpentinus, the 

 snake blenny, at Woods Hole, Massachusetts, dredged from a depth 

 of 41 fathoms. The largest female is made the species type and is 

 numbered 39607, U.S.N.M. 



Specific characters of female. — Cephalothorax in fine with the sec- 

 ond maxillae, slender, cylindrical, slightly swollen at the base and 

 smooth; head not enlarged, squarely truncated anteriorly, and with- 

 out a dorsal carapace; trunk ellipsoidal, one- third shorter than the 

 cephalothorax, with a row of shallow transverse wrinkles along either 

 side of the midline on the ventral surface; genital process partially 

 separated inside the skin but not showing externally; egg strings 

 ellipsoidal, a little shorter than the trunk; eggs large, arranged in 



