Neib Species of Gypridina. 29 



thus felt that it was covered with a mass of granular substance 

 which I wiped off and took home. It was difficult to get the 

 phosphorescence off the hands." 



It is noteworthy that Mr. Shepherd observed the phosphor- 

 escent ostracods at Brighton about the end of October, on a calm 

 hot night. Mr. Thiele also procured his gathering in warm 

 weather in the beginning of February, and a further supply 

 which he kindly procured for me, in the living condition, he 

 obtained early in July (midwinter), when they were apparently 

 not so numerous in such shallow water as was then explored. 



DESCRIPTION. 

 Genus — Gypridina. 



Cypridina thielei, sp. nov. (Plate IX.) 



Male. — Garapace seen from the side, subovate, and widest 

 (highest) in the centre. Dorsal margin strongly arched ; ventral, 

 evenly but less strongly curved, and depressed at the anterior 

 third. Anterior extremity with a rounded, blunt beak, curving 

 over the antennal sinus, which is central and not very deeply 

 incised. Posterior extremity produced into a beak-like process, 

 convex on the ventral side, concave on the dorsal. Edge view, 

 elongate- ovate, ends nearly equal. 



Figured .specimen. — Length, 1.9 mm.; height, 1.2 mm. 



Female. — The form of the carapace nearly resembles that of 

 the male, but is larger, and higher near the middle, with the 

 antero-ventral margin distinctly depressed. The antennal notch 

 is deeper and more open ; posterior extremity rounded at the 

 ventral corner, and sub-truncate on the dorsal side, with only the 

 faintest indication of a posterior beak. 



Figured specimen. — 2.17 mm.; height, 1.33 mm.; thickness of 

 carapace just below the middle, 1 mm. 



Getieral characters. — Shell thin, polished, and very finely punc- 

 tate ; in places showing opaque spots which apparently increase 

 in size on drying, due to the deposition of phosphate of lime at 

 certain centres. Antennae moderately long for this genus. 



