638 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.47. 



four spines, the latter smooth. Mandibles slender, with eight comb- 

 like teeth, all of the same size; firet maxillae tipped with three jointed 

 setae, palp long and tipped with three spines. 



Second maxillae long and stout and more or less wrinkled, jointed 

 at the tip by a button-shaped bulla. These maxillae are attached to 

 the sides of the head, on a level with the dorsal surface, and just out- 

 side the bases of the maxillipeds. The latter have a moderately stout 

 basal joint, carrying a short process on its inner margin, which is cov- 

 ered with bristling haire; terminal claw short and slender, with an 

 accessory spine on the inner margin near the tip. 



Color (preserved material), a uniform yellowish- white, the pitted 

 areas brownish, the egg strings orange. 



Total length (without egg strings), 22 mm. Length of second max- 

 illae, 14 mm.; of egg strings, 25 mm. Greatest width, 5 to 7 mm. 



Specific characters of male. — Cephalo thorax inclined to the trunk 

 axis nearly at right angles and covered by a well-defined carapace; 

 trunk conical and distinctly segmented in younger specimens, but 

 thickening posteriorly and losing its segmentation in older specimens; 

 in both it is about the same length as the cephalothorax and termi- 

 nates in two small spinelike anal laminae, curved backward along the 

 dorsal surface. First antennae four-jointed, slender; second pair, 

 chelate, the endopod ending in a leafhke lamina, smooth and un- 

 armed, the exopod with a small terminal lamina bifid nearly to its 

 center. Firet maxillae tipped with two long setae and a shorter one 

 on the inner margin; second maxiDae rather stout and tipped with a 

 stout claw; maxillipeds also stout, the terminal claw curved and fit- 

 ting against a process on the basal joint, making a powerful chela. 



Color (preserved material) a tmiform yellowish-white. 



Total length, 2.5 mm. Length of cephalothorax, 1.2 mm. Great- 

 est width, 0.75 mm. 



{elongatus, elongate, alluding to both the trmik and the egg 

 strings.) 



Remarlcs. — The male described by Steenstrup and Liitken differs 

 from the two found upon the present females chiefly in the inflation 

 and segmentation of the trunk. In their specimen the trunk was 

 almost spherical and showed no traces of segmentation; in the present 

 specimens it tapers decidedly backwards and is distinctly segmented. 

 But these are just the differences one would expect between young 

 and fully developed males. 



The minute size and enormous number of the eggs is also worthy 

 of notice. Possibly the copepodid larvae can not attach themselves 

 to any other portion of the host's body except the eye where they are 

 always found. If this be true, it would greatly restrict their chances 

 of survival and so would necessitate a much larger number of eggs. 



