758 



CRUSTACEA. 



in length from the first to the sixth ; sixth and seventh equal. The 

 lateral prolongations of the first five abdominal segments are as long 

 on either side as half the rest of the segment, and those of the fifth 

 segment project beyond base of stylets. The last segment is as long as 

 the five preceding together. The shorter branch of the caudal appen- 

 dages is about two-thirds as long as the longer. Antennae short and slen- 

 der, each pair seven-jointed, posterior a little the longer. Eyes scarcely 

 apparent at the posterior angles of the head. Legs increase in size 

 from first pair to sixth ; seventh more slender than the preceding. 

 First joint in all nearly cylindrical ; second, third, and fourth joints 

 together shorter than the first, except in the seventh pair, in which 

 they are about as long as the first. Claw of seventh pair about half the 

 size of that of the preceding pair. Branchial plates beneath abdomen 

 oblong; exterior one with a very short transverse basal joint, the 

 inner margin of which forms an angle posteriorly, which is subacute. 

 This is a broad species, like the depressa; but the anterior thoracic 

 segments are not laterally prolonged, as in that species. The sixth 

 and seventh thoracic epimerals are shorter than in the BlainviUii, and 

 longer than in the maculata, or aculeata; moreover, the three posterior 

 thoracic segments are acute on either side, unlike the maculata or 

 affirm. 



Neeocila latiuscula. 



Corpus ovatum, sesqui longius quam latum. Thorax parce oblongus, 

 segmentis 5 anticis latere obtusis, duobus posticis acute productis ; epi- 

 meris 2 anticis lateris utriusque extremitate rotundatis, proxirnd suba- 

 cutd, reliquis acutis, sextd basin 7mce non attingente. Abdomen vix ob- 

 longum, segmento 5 to basin stylorum utrinque attingente, segmento 6 to 

 paulo transverso, postice rotundato, medio emarginato (?) . Styli cau- 

 dales longi, ramis inaequis, externo styliformi. 



Body ovate, one and a half times as long as broad. Thorax sparingly 

 oblong ; five anterior segments obtuse, last two acutely produced 

 into a spine either side ; epimerals of first two segments obtusely 

 rounded, next subacute, the rest acute ; sixth not reaching to base 

 of seventh. Abdomen hardly oblong; fifth segment prolonged either 

 side to base of caudal stylets ; sixth segment a little transverse, 



