CYPROIDEA. 1301 



In the Pacific, north of the Equator, near Hall's Island, one of the 

 Kingsmill Group. 



This species closely resembles the preceding, and may be the same. 

 Yet the form of the mandibular feet and also of the posterior legs, 

 differs so much from the drawings of the Atlantic species, that I have 

 made them separate. The form of the shell is the same, and so also 

 the form of the spiculum and the anterior antennae. The setse of the 

 mandibular feet were unilaterally setulose, and this is probably a 

 common character. The relation of the organs d, e, /, in the draw- 

 ing, was fully ascertained, the last-mentioned being the posterior. A 

 third pair of feet still posterior to these was not observed, d repre- 

 sents a part of the second pair of maxillse. 



Genus HALOCYPEIS, Dana. 



Corpm curtum. Pedes rnandibulares fere recti et non inflexi, articulo 2do 

 farce dblongo. 



Form short. Mandibular feet not inflexed and folded upon itself, but 

 straight nearly, second joint sparingly oblong. 



The second joint of the mandibular feet, instead of being straight, 

 is much bent, its basal part being parallel for a short distance with 

 the preceding joint, and the apical half nearly at right angles with it. 

 The third joint is not longer than the second ; and this and the fol- 

 lowing part remain straight. The contrast between the form in this 

 genus and Conchoecia will be observed in the figures to be great and 

 important. The spiculum in this genus as far as observed is terete, 

 instead of sagitto-capitate. Moreover, the anterior antennaB are 

 shorter, the setse somewhat bent, and the incrassate one was not den- 

 ticulated towards the extremity. 



Halocypris inflata. 



Superne visa, brevissimd ovata, fronte rotundata, posticd subacuta; latere 

 visa, subrotundata, dorso fere recta, literce D forma similis, angulis 



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