

CAPRELLTDEA. 



813 



Length, seven-eighths of an inch. Colour, pale yellowish. Second 

 thoracic segment is about as long as head and first thoracic segment. 

 Joints of flagellum of superior antennae oblong cylindrical; setse minute, 

 one on under side close appressed to the joint, which is about as long 

 as the joint, besides two or three others much smaller ; base naked, or 

 very nearly so. Inferior antennae with fourth joint about as long as pre- 

 ceding part, and remaining portion not half the fourth joint in length; 

 a row of about six extremely short setules on under margin of fourth 

 joint, and four on preceding joint. First joint of second pair of legs 

 longer than second thoracic segment. Finger of same much curved, 

 about two-thirds as long as hand ; fifth pair of legs more slender than 

 sixth or seventh. The rudimentary legs end in a few minute setules. 



The female is closely like the male in all points nearly, excepting 

 the hand of the second pair. The third joint of the superior antennae 

 may be a little longer or a little shorter than the second; the first 

 joint is not half the second. 



Genus CAPRELLA, Lamarck. 



I. Thorax nec aculeatus nec tuberculatus. 



1. From aut dorsum capitis spinel tuberculove armata. 



Caprella dilatata, Kroyer. 



Plate 54, fig. 3 a, animal, enlarged; b, side view of head; c, hand 

 of second pair of legs ; d, abdomen ; e, part of flagellum of superior 

 antennae. 



Kio Janeiro ; brought up on the anchor, January, 1839 ; also, on 

 sea- weed, along the sea-shore, beyond Pray a Grande, December 21, 

 1838. 



Body slightly granulous under a high magnifier, stout, segments 

 but little oblong or not at all so. Head twice as long as next seg- 

 ment, armed in front with a horizontal spine. Third segment of 

 thorax somewhat quadrate, anterior angles prominent, fourth trian- 

 gular. Superior antennae a little shorter than half the body, very 



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