562 NEW SPECIES OF PARASITIC COPEPODS. 



Appcnda(j<^s. — The appoixlnges of the ventral side correspond very 

 closely witli those of clciifatHS, but the tliird pair of feet present suffi- 

 cient ditierences to characterize the species. I Jjave ligured only the 

 four pairs of swinuiiing feet of the var, iStimpsoni, and note below tlie 

 slight variations wliich they i)resent when comi)are(l with tliose of tlic 

 tj'pical form. 



The anterior antennae are two-jointed, the basal joint being much 

 wider and nearly twice as long as tlie terminal, and ei:posed for about 

 one-thild its length beyond the sides of the frontal process. The tei- 

 miual joint is subelliptical in outline, and rounded at the, tip, wliicli 

 bears numerous veiy small elongate i)apilhe. Larger pnpilhe of tli'! 

 same character border the distal end of the basal joint and extend a 

 short distance inward along its front edge. The ])osterior antenn;e ap- 

 jjarently consist of three short, stout, basal joints in addition to the long, 

 slender terminal one, which is very slightly curved just at the tip. The 

 proboscis is long, tapering, and becomes very slendei' toward the tip. 

 The reniform processes of the second maxillipeds are shorter and stouter 

 in the typical form than in dentatus, and in var. Stimpsoni are somewhat 

 larger than in the first named. 



The swin^miug feet consist each of a basal joint and two rami, with an 

 elongate, flexible spine attached just outside of the outer ramus. The 

 rand of the two anterior {)airs are each two-jointed; those of the two 

 l>osterior pairs, eacli one jointed, though the inner ramus of each is more 

 or less lobed. The outer rariu all bear stout spines, the inner never 

 more than a single very small spine, which has been observed only in 

 the first and second pairs. 



The basal joint of the first pair of feet is comparatively small. The 

 outer ranuis consists of a very stout proximal joint, much wider and 

 longer than the distal^ the inner margins of both continuous, the outer 

 margin of the proximal projecting far beyond that of the distal, and at 

 the outer angle furnished with a very long, stout, cur\ cd spine. The 

 terminal joint bears along the distal margin four similar spines, of 

 which tlie three outer ones are about three-fourths as long as the former, 

 the inner one short, and all strongly curved. The proximal joint of the 

 inner ramus is short and broad, the distal joint about twice as long and 

 irregularly elongate, ovate in outline, with a minute spine about midway 

 of the inner uuirgin. The basal joint of the feet cf the second pair is 

 of moderate size, and the outer ramus resembles that of the first pair, 

 but is somewhat smaller, and the spines of the distal joint are subequal 

 in size. The two joints of the inner ramus are subecjual in length, the 

 basal broadest and cut oil" obliquely at the distal end, the terminal sub- 1 

 circular, with a narrow indentation on the distal margin an.d a minute « 

 curved spine on the inner margin. The basal joints of the third and 

 fourth pairs are very large, as in dental its. and tlie rami rehitivdy small, 

 those of the third pair, however, being considerably larger than those of ^ 

 the fourth pair. The outer ramus of the third pair is elongate-ovate ia| 



