NODOSARIINAE 391 



275. Cristellaria orbicularis (d'Orbigny). 



Robulina orbicularis, d'Orbigny, 1826, TMC, p. 288, no. 2, pi. xv, figs. 8, 9. 



Cristellaria orbicularis, Brady, 1884, FC, p. 549, pi. Ixix, fig. 17. 



Cristellaria orbicularis, Cushman, 1910, etc., FNP, 1913, p. 67, pi. xxxvi, figs. 4, 5. 



Three stations : 48 ; WS 91, 93 . 



Extremely rare but quite conformable to the Type in Paris. One good specimen at 48, 

 and one individual at WS 93. 



276. Cristellaria rotulata (Lamarck) (Plate XII, fig. 21). 



Lenticulites rotulata, Lamarck, 1804, AM, p. 188, no. 3 ; 1816, TEM, pi. 466, fig. 5. 

 Cristellaria rotulata, Parker and Jones, 1865, NAAF, p. 345, pi. xiii, fig. 19. 

 Cristellaria rotulata, Brady, 1884, FC, p. 547, pi. ixix, fig. 13. 



Twenty-three stations : 48, 236, 388; WS 71, 80, 83, 84, 86, 87, 88, 91, 92, 93, 95, 97, 99, 109, 217, 

 221, 225, 246, 248, 408. 



Universally distributed and often fairly common. The finest and largest specimens at 

 WS 408; very good at WS 83, 84, 86, 87, 88. At 236 and WS 217, 221, the species is 

 represented by very small individuals. At WS 88 an abnormal specimen occurs, which 

 we figure, representing the fusion of two megalospheres each of which has continued 

 independent growth. 



277. Cristellaria vortex (Fichtel and Moll). 



Nautilus vortex, Fichtel and Moll, 1798, TM, p. 33, pi. ii, figs. d-i. 

 Cristellaria vortex, Brady, 1884, FC, p. 548, pi. Ixix, figs. 14-16. 

 Cristellaria vortex, Cushman, 1910, etc., FNP, 1913, p. 68, pl. xxxii, fig. 3. 



One station : WS 84. 



One or two good specimens at this station. 



278. Cristellaria cultrata (Montfort). 



Robulus cultratus, Montfort, 1808-10, CS, i, p. 214, 54'' genre. 

 Robulina sub-cultrata, d'Orbigny, 1839, FAM, p. 26, pl. v, figs. 19, 20. 

 Robulina canariensis, d'Orbigny, 1839, FIC, p. 127, pl. iii, figs. 3, 4. 

 Cristellaria cultrata, Brady, 1884, FC, p. 550, pl. Ixx, figs. 4-6. 

 Cristellaria cultrata, Cushman, 1910, etc., FNP, 1913, p. 64, pl. xxxix, fig. 4. 



Eleven stations: 235, 388; WS 83, 84, 87, 88, 91, 92, 97, 245, 408. 



The best specimens at WS 408. Other good ones at 388 and WS 88, but as a rule 

 the specimens are poorly developed with scarcely apparent "keels". 



There are two Type tubes in Paris, one labelled R. cultrata, as on the Plate (pl. v, 

 figs. 19, 20), " Amerique meridionale " in which the specimen is destroyed. In the other, 

 labelled R. sub-cultrata, as in the Text, "lies Malouines", there are seven specimens, 

 some of which agree, in the depth of their keel, with d'Orbigny 's figure on pl. v. The 

 others have narrow keels and may be compared with his figure of R. catiariensis which he 

 himself identified with R. stib-cultrata . It is evident that d'Orbigny was not hide-bound 

 in his views upon the importance of the development of the keel. 



