820 CRUSTACEA. 



front. Margin of body very finely serrulate, as seen in vertical view, 

 and the whole thorax pubescent. Inferior antennae about half as 

 long as base of superior, ciliate below. Superior pair pubescent; 

 second joint very long and slender, more than twice the first in 

 length; the third joint a little shorter than the second. The fla- 

 gellum slightly longer than first basal joint, few-jointed. Hand of 

 first pair of legs about one-third the length of hand of second pair. 

 Anterior margin of coxa of second pair, serrulate ; near base there is 

 a short spinous process attached to the thoracic segment. The tarsus of 

 the six posterior legs has two short spines below near base, not situated 

 on a prominence, and the joint suddenly decreases from these spines 

 towards the apex. Last two joints of inferior antennae together about 

 as long as preceding. 



Kroyer described and figured this species in his Tidsskrift, iv. 1843, 

 Heft 5, and tab. 6, figs. 14-20. He makes the body and superior 

 antennae a little less slender than in our specimens. He figures a 

 female, which may possibly be another species. 



The animal which we have figured (fig. 2 b, pi. 55), as the female, 

 differs widely from the Januarii, and may be distinct. The head is 

 unarmed, as in the Januarii, but it is but slightly shorter than the first 

 thoracic segment; the flagellum of the superior antennae is much 

 longer than the preceding joint, and about twelve-jointed, joints rather 

 long ; the second thoracic segment is hardly longer than the third ; 

 the inferior antennae are as long as first two basal joints of superior, 

 and half of nearly third joint; the branchiae are narrow elliptical, but 

 not linear. The hand of the second pair is narrow, the palm slightly 

 arcuate, and armed with four or five minute spinules ; a tooth below 

 rather near base, two near apex; finger three-fourths as long as the 

 hand. 



This species is named in the author's earlier manuscripts Caprella 

 humilis, and should it prove that the species is distinct, the name may 

 be retained. One specimen of similar characters appears to be a male, 

 as the second pair of legs are attached to the segment posterior to its 

 middle ; and if this is a safe criterion the species should be sustained. 



Caprella globiceps. 

 Corpus crassiusculum, segmentis tJwracis 2do Stio ito btoque, longitudine 



