188 MR. LUBBOCK ON SOME OCEANIC ENTOMOSTRACA 



CoxciiOECiA CURTA, n. s. Corpus curtum. Latere visa literse forma D similis, dorso fere 

 recto, antice rostrato, postice rotunclato; superne visa antice rotundata, postice 

 subacuta. Spiculuui sagitticapitatum. Antenna priinse setis 3 longis, subsequis. 

 Antennarum secundarum articulus secundus duplo longior quam ultimi simul sumti. 

 Pes mandibiilaris articulo secundo vix elongate, articulis sequentibus subasquis, vis 

 attenuatis. Pedes priixd setis 3 apicalibus, longis, articulo ultimo perbrevi. 



Surely this species must be considered as intermediate between ConchceGia and Ralo- 

 cypris, since, with the sagittate spiculum, the first pair of maxillse, and the long hairs at 

 the end of the first pair of legs, which belong to the former, it possesses the general 

 outline of Salocypris. Moreover the second segment of the mandibles is not so much 

 elongated as in CDnclicecia. Upon the whole, however, the characters which point to 

 Conchoecia seem more important than those which would unite it to Jialocypris. The 

 generic description, of Conchoecia must, however, be altered ; but I am unwilling to do so 

 until we are acquainted with a greater number of species, and with the differences which 

 may occur at different ages. The difference in general outline is very marked between the 

 extreme forms ; but some of the new species already discovered tend to fLU up the gap, and 

 render the rule less easy of application. 



The spiculum is ^Mo" in length, the anterior antenna being at to" = they are 3-jointed. 



The little appendage of the posterior antennae has a strong spine on the basal segment, 

 which is opposed to another, longer, curved spine, which springs, as Avell as the four long 

 setse, from the small apical segment. 



In outline the two valves are nearly, if not quite, similar to one another. 



The shell is reticulated, as in Halocypris rostrata. 



Length -g-^oths of an inch. 

 Collected April 19, in S. lat. 0° 40', W. long. 0° 20'. 

 Pl. XXIX. fig. S, x30; fig. 9. anterior antenna, x 30. 



Haxocypris, D. 

 Haloctpris atlantica, Lbk. 



This species was described by me in the ' Transactions of the Entomological Society,' 

 n. s. vol. iv. part ii. My previous figure, however, gives a somewhat incorrect idea of 

 the organ. The two antennse were lying one exactly over the other (as I have ascertained 

 by referring to the actual specimen copied) ; and I have consequently represented too 

 many hairs. In fact there is one long seta, and four rather short thick rod-like hairs 

 which end abruptly and without tapering. In my previous specimen these hairs were 

 imperfect. The spiculum is slightly swollen at the free end. 



The second segment of the posterior antennje is twice as long as the succeeding joints. 

 Collected in S. lat. 0° 40', W. long. 0° 20'. 



Halocypris brevirostris, D. 



This species appears to be very common. The anterior notch is single in one valve, and 

 double in the other. The latter was on the left side in four specimens examined by me. 

 Collected in S. lat. 0° 40', W. lono-. 0° 20'. 



