REPORT ON THE OSTRACODA. 89 



[PI. XIII. fig. 6, a-h. a Shell of female seen from left side, b from above, c from Ijclovv, 

 d from front. Figures e~h show similar views of the male. All magnified 60 diameters.] 



47. Cythere craticula, n. sp. (PI. XXI. fig. 7, a-d). 



Shell larger and much more tumid than that of Cythere Jtabellicostata, but, seen 

 laterally, of almost exactly the same shape; seen from above, the shape approaches that 

 of a very irregular elongated octagon, about twice as long as broad ; the sides are nearly 

 parallel and slightly sinuated, converging gently towards the front and much more abruptly 

 behind, each extremity forming a wide truncated prominence, the anterior, however, much 

 the wider of the two ; the posterior is emarginate, the anterior bimucronate ; end view 

 very irregularly quadrate ; height and width about equal, the lateral margins having a 

 very large and conspicuous median protuberance. The lateral surfaces of the valves are 

 marked by two or three flexures and very prominent longitudinal ribs, which again are 

 connected by several similar transverse ribs, forming a very open network, the interspaces 

 of which are excavated into numerous smaller cavities ; on the ventral surface the longi- 

 tudinal ribs are more numerous and closely set ; the anterior margin of the shell has a 

 few small blunt spines, the posterior two or three of rather larger size. Length, l-38th 

 of an inch ('66 mm.). 



Dredged in Simon's Bay, South Africa, in a depth of 15 to 20 fathoms (Station 140). 



p?l. XXI. fig. 7, a-d. a Shell seen from left side, b from above, c from below, d from 

 front. All magnified 60 diameters.] 



48. Cythere stolonifera, n. sp. (PL XXI. fig. 3, a~d). 



Shell compressed, elongated ; seen from the side, oblong, subovate, with a much- 

 produced infero-posteal angle, rather higher in front than behind, height equal to about 

 one-half of the length ; anterior extremity w^ell rounded, and forming a continuous curve 

 with both dorsal and ventral margins, posterior obliquely truncated, much produced below^ 

 the middle, where it is also minutely dentate ; dorsal margin gently arched and some- 

 what sinuous, ventral almost straight ; seen from above, the outline is compressed, ovate, 

 widest behind the middle, and having both extremities projected as rectangularly truncate 

 processes, the anterior much the larger of the two ; width considerably less than half the 

 length ; the end view is in the form of a narrow ii-regular octagon, its sides more or less 

 denticulated or spinous. The sides of the valves are ornamented with several flexuous 

 ribs, two or three of which run lengthwise, the rest obliquely or in various directions ; 

 the margins, especially the anterior and ventral, are produced into a well-marked, flattened, 

 or concave encircling rim. Length, l-42d of an inch ("6 mm.). 



Dredged in Simon's Bay, South Africa, 15 to 20 fathoms (Station 140). 



[PL XXI. fig. 3, a-d. a Shell seen from left side, b from above, c from below, d from 

 front. Magnified 60 diameters.] 



(ZOOL. CHALL. EXP. — PART HI. 1880.) C 12 



