GAMMARIDEA. 835 



second ; last having a short acute branch near middle. Fifth pair 

 of feet as long as the body ; first joint very long, minutely spinu- 

 lous below ; seventh pair less than half the fifth. 



Plate 55, fig. 6 a, animal, enlarged ; b, eye. 



Atlantic Ocean, latitude 1° north, longitude 18° west Collected, 

 October 31, 1838, at 4 h. A. m. 



Length, three lines. Colour, reddish in irregular spots ; long an- 

 tennse, in part reddish. The body consists of a head, seven thoracic 

 segments, and six abdominal. The head is short, about half as long 

 as wide. The last three thoracic segments are as long as the first 

 four. The three anterior abdominal segments are nearly of the same 

 size, the anterior a little the longest; the following one is much 

 smaller, and the others rapidly decrease in size. The stylets are 

 slender acute. The posterior one is branched, and this branch is 

 short acute, and is articulated with the middle of the organ. The 

 antennae are stout at base, and gradually taper to an acute apex, they 

 have minute spines on the outer side, and are short pubescent on the 

 inner. The eyes consist of eight lenses around a central one. 



The four anterior legs are short hirsute, and end in a small claw ; 

 the second pair is a little longer than the first ; the next two pairs 

 are longer, and very nearly naked. The fifth pair is about twice as 

 long as fourth, and equally slender or even more so ; the first joint 

 is about as long as the next three ; the second is very short ; the fifth 

 is one-fourth the length of the first ; the claw is very small. The sixth 

 pair is much shorter than fifth, and the seventh not half the fifth. 



In the specimen examined, one antenna was more than one-half 

 shorter than the other, and yet apparently perfect. It is probable 

 that it had been broken at the articulation below, and was growing 

 out. 



Along the sides of the segments of the body, the outline of the epi- 

 merals was barely distinguished. 



CLYDONIA L0NG1PES. 



C. gracili similis. Antennce duce fere corporis longitudine, subulahe, 

 parce crassiores, obsolete multi-articulatce. Pedes septimi quintis non 



