CASSIDULININAE 359 



figs. 4, 5) so far as his fig. 5 is concerned, but it appears to be quite distinct. C. brazi- 

 liensis has a thin and translucent wall with very clear sutures and its length is only 

 °"35~°'4° mm. as compared with an average o-8omm. in our variety which has thick, 

 opaque walls and indistinct sutures. Length, 0-75-0-82 mm. ; breadth, o-6o-o-62 mm. ; 

 thickness, 0-35 mm. 



162. Cassidulina subglobosa, Brady. 



Cassidiilina subglobosa, Brady, 1879, etc., RRC, 1881, p. 60; 18S4, FC, p. 430, pi. liv, fig. 17. 

 Cassidulina subglobosa, Chapman, 1907, TFV, p. 33, pi. iv, fig. 84. 



Thirty-seven stations: 48, 51, 53, 235, 236, 388; WS 71, 72, 73, 76, 77, 80, 83, 84, 86, 88, 89, 90, 

 91, 92, 93, 97, 98, 99, 108, 109, 210, 213, 215, 217, 219, 221, 225, 245, 248, 408, 409. 



Universally distributed, but never occurring in such numbers as C. crassa. The best 

 stations are WS 73, 76, 90, 92, 99. The specimens are fairly true to type, but on the whole 

 rather small. At a few stations a variety occurs characterized by a somewhat compressed, 

 or less than ordinarily inflated test. It usually occurs in company with the type, but at 

 WS 86 it occurs without the type. 



163. Cassidulina parkeriana, Brady (Plate IX, figs. 22-25). 



Cassiduliuaparkeriana, Brady, iS79,etc., RRC, i88i,p.59; 18S4, FC, p. 432, pi. liv, figs. 11-16. 

 Cassidulina parkeriana, Cushman, 1910, etc., FNP, 1911, p. 100, fig. 154. 

 Cassidulina parkeriana. Chapman, 1914, EDRS, p. 30, pi. ii, fig. 13. 



Thirty stations : 48, 51, 53, 388 ; WS 71, 73, 76, 77, 79, 80, 83, 86, 87, 88, 90, 91, 92, 93, 97, 98, 99, 

 109, 210, 213, 215, 217, 219, 225, 245, 248. 



Almost universally distributed, never very common, but, except for a few stations, 

 always present in moderate numbers. In the area between Cape Horn and the Burd- 

 wood Bank (WS 83, 86, 87, 88, 91, 92, 93) the species reaches its optimum development 

 in size and beauty. At most of the stations two very distinct forms are present, the 

 megalospheric form which is shorter, stouter and with comparatively few chambers in 

 the straight series, and the microspheric form which is much more delicately con- 

 structed, and with a long rectilinear series. The young specimens of this species before 

 the adoption of the linear method of growth are by no means easy to separate from 

 C. subglobosa. 



Genus Ehrenbergina, Reuss, 1850 



164. Ehrenbergina pupa (d'Orbigny) (Plate IX, figs. 40-47). 



Cassidulina pupa, d'Orbigny, 1839, FAM, p. 57, pi. vii, figs. 21-3. 



Ehrenbergina pupa, Brady, 1884, FC, p. 433, pi. cxiii, fig. 10 a-c (not pi. hi, fig. i). 



Thirtystations:48,5i,236,388;WS7i,77,79,8o,83,S4,86,87,88,89, 90,91, 92, 93, 97, 98, 

 210, 213, 215, 217, 225, 245, 246, 248, 408, 433. 



Generally distributed, often very abundant. This typically Falkland Islands form is 

 particularly rare elsewhere. In the Falkland Islands dredgings it occurs in great numbers, 

 particularly at some of the stations, e.g. WS 83, 84, 87, 92, 93. At most of the stations 

 there is considerable range of variation. D'Orbigny figures only a coarse triangular 

 form. In the Falklands every range of variation is to be found, from short, broad, almost 



