582 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



segment; they are narrow, curved in the form of parenthesis marks, 

 and are not segmented. The ovaries are inside the cement glands^ 

 and the oviducts are coiled back and forth in the space between the 

 cement glands and the intestine. 



Color (preserved material), a uniform yellow-gray, deepened into 

 brown in the neck and genital segment and into orange in the egg 

 strings. Total length, exclusive of the posterior processes, 30-^10 

 mm. Cephalothorax, 10-15 mm. long, 2.50-3 mm. wide. Neck, 10-15 

 mm. long, 0.50 mm. wide. Trunk, 10-15 mm. long, 6-10 mm. thick, 

 8-12 mm. wide. Posterior processes, 7-9 mm. long. Egg strings^ 

 30-40 mm. long, 3-4.50 mm. wide. 



/Specific characters of male. — In the male of this species the front 

 of the head is not as obliquely truncated as in cornuta^ the swellings 

 on the dorsal surface which contain the testes do not project as 

 prominently, and the posterior part of the head is relatively much 

 thinner; the fused basal joints of the maxillipeds are not as thick or 

 as long, the thorax is relatively shorter and narrower, and the stout 

 conical spines at the posterior end of the genital segment are replaced 

 by a pair of tiny knobs. Internally each testis reaches around the 

 side of the intestine almost to the ventral surface and the cement por- 

 tion of the sperm duct is relatively larger, especially in the third and 

 fourth segments. 



The first antennae are three- jointed, but the terminal and basal 

 joints are short, and the basal joint is not flattened laterally. In the 

 second antennae the three basal joints are about the same length, 

 but diminish regularly in width ; the cylindrical process of the second 

 joint is given oif at the base of the joint instead of the distal end, 

 and all the joints are relatively shorter than in cornuta. 



The first and second maxillae are the same as those of cornuta^ 

 but the terminal claw of the maxillipeds is not as stout, and the 

 second joint is armed with three short spines. 



Color (preserved material), a uniform yellow-white. Total length, 

 3 mm. Diameter of back of head, through the testes, 0.51 mm. Dor- 

 soventral thickness of same, 0.51 mm. Diameter of genital segment, 

 0.50 mm. ; thickness, 0.25 mm. 



{boumeri, to Prof. E. L. Bouvier.) 



REBELULA CORNUTA, new Bpeeies. 



Plate 55. 



Host and record of specimens. — A single female with attached male 

 was obtained off Ochiishi Saki, at the eastern end of Hokkaido, 

 Japan, from the flesh on the side of a Synaphohranchus afff.nis Gun- 

 ther, dredged from a depth of 359 fathoms by the Bureau of Fish- 

 ftries steamer Albatross^ October 3, 1906. The female has been given 



