188 MR. LUBBOCK ON SOME OCEANIC ENTOMOSTRACA 
Conchcecia curta, n. s. Corpus curtum. Latere visa liters forma D similis, dorso fere 
recto, antice rostrato, postice rotundato; superne visa antice rotundata, postice 
subacuta. Spiculum sagitticapitatum. Antennse prima? setis 3 longis, subsequis. 
Antennarum secundaruni articulus secundus duplo longior quam ultimi simul sumti. 
Pes mandibularis articulo secundo vix elongato, articulis sequentibus subsequis, vix 
attenuatis. Pedes primi setis 3 apicalibus, longis, articulo ultimo perbrevi. 
Surely this species must be considered as intermediate between Conchcecia and Halo- 
cypris, since, with the sagittate spiculum, the first pair of maxillae, and the long hairs at 
the end of the first pair of legs, which belong to the former, it possesses the general 
outline of Halocypris. Moreover the second segment of the mandibles is not so much 
elongated as in Conchcecia. Upon the whole, however, the characters which point to 
Conchcecia seem more important than those which would unite it to Halocypris. The 
generic description of Conchcecia 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 fill up the gap, and 
render the rule less easy of application. 
The spiculum is 2^0" in length, the anterior antenna being *tHk": they are 3-jointed. 
The little appendage of the posterior antennge has a strong spine on the basal segment, 
which is opposed to another, longer, curved spine, which springs, as well as the four long 
setae, 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 -^Joths of an inch. 
Collected April 19, in S. lat. 0° 40^, W. long. 0° 20'. 
Pl. XXIX. fig. 8, x30; fig. 9. anterior antenna, x 30. 
Halocypris, D. 
Halocypris atlaxtica. 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 o 
the organ. The two antennae were lying one exactly over the other (as I have ascertainec 
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 antennae 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. long. 0° 20'. 
