176 
“TERRA NOVA” EXPEDITION. 
be made out more clearly. The shell was now balanced against the sloping side of 
the watch glass, so that the uppermost valve was in a horizontal position for drawing. 
The valves could generally be separated along the hinge-line, simply by opening them 
out fully and gently pulling them apart at one end. The specimen could then be 
dissected, and drawings of the parts made in formalin or spirit. 
For permanent preparations the dissection could most conveniently be done in oil 
of cloves after staining. The best results were obtained by staining in Congo Red, 
which stains the chitin remarkably well, showing the fine teeth and hairs very clearly. 
Specimens may be stained for thirty seconds in a half per cent, solution of Congo Red 
in ninety per cent, alcohol. Better results were obtained by diluting this solution with 
two to ten times its volume of ninety per cent, alcohol, and staining for a longer time. 
Oil of cloves was used for clearing, and permanent preparations were made of all the 
species by mounting in Canada Balsam, using a cavity-slidc for the larger species in 
order to minimise distortion. The shells were stained in the same way and mounted 
alono- with the dissection. 
O 
The measurements of length were made parallel to the hinge-line from the most 
anterior point below the rostral notch, and do not include the rostral tooth. 
Ill—LIST OF SPECIES. 
Codonocera cruenta, Brady. 
Philomedes assimilis, Brady. 
Cy.clasterope lobiancoi, Muller. 
llalocypris globosa, Claus. 
,, inflatci, Dana. 
Conchoecia acuticosta, Muller. 
,, (data, Muller. 
,, antipoda, Muller. 
,, belgicae, Muller. 
,, bispnnosa, Claus. 
,, chuni, Mtiller. 
Conchoecia daphnoides , Claus. 
,, discophora, Midler. 
,, edentata, Muller. 
,, hettacra, Muller. 
,, imbricata (pars Brady)Muller. 
,, oblonga, Claus. 
,, serrulata, Claus. 
,, spinirostris, Claus. 
,, stigmatica, Muller. 
,, subarcuata, Claus. 
Euconchoecia chierchiae, Muller. 
IV—LIST OF STATIONS AT WHICH OSTRACODA 
WERE OBTAINED. 
Atlantic (Mostly Tropical). 
Station 39. 
April 26/27, 1913 
55 
40. 
>> 2 O ,, 
55 
49. 
May 6, ., 
55 
50. 
„ 7, ,, 
55 
64. 
26, ,, 
5 5 
65.. 
,, 26, ,, 
5 5 
66. 
27 
55 ^ 1 5 55 
5 5 
67. 
27 
5 5 1 5 5 5 
55 
68. 
„ 28, „ 
6 miles off mouth of Rio de Janeiro, 2 metres, 11 p.m-1.30 a.m. 
,, ,, ,, ,, ,, 2.30—5 a.m. 
18° 5T S., 33 40' W., surface, 4.30-5 a.m. 
18° S., 31° 45' W., surface, 12.35-1.15 a.m. 
23° 28' N., 34° 45' W., surface, 1.30-2 a.m. 
23° 28' N., 34° 45' W., 
25° 35' N., 34° 10' W., 
25° 35' N., 34° 10' W., 
27° 22' N., 33° 40' W., 
