15 



or rounded ; convolutions few in number (generally three). Seg- 

 ments few (three or four in hnal convolution), and much inflated. 

 Superior surface, ornamented by raised papilhe, or by thick exo- 

 genous shell-growth, with deep excavations at intervals, giving 

 a roughly reticulate appearance to the test. Inferior surface 

 highly convex, without ornamentation, and smooth. Sutures 

 non-limbate, marked externally by depressed lines. Umbilicus 

 slightly excavated, and usually possesses several large perfora- 

 tions. AjDerture, an inconspicuous slit (sometimes spanned by 

 shelly growths), situated on the umbilical margin of final seg- 

 ment. Large specimens measure -^^ inch. 



A large shell, combining in some degree the external features 

 of liotalia papiUosa, Br., and Fulvinuliua p2i7ictidafa, cVOrh. It 

 can be easily distinguished by its nearly plano-convex outline, 

 inflated chambers, and fewness of its segments. Its size renders 

 it conspicuous in the material, but it is not very common. Lower 

 Bed. 



Genus — Rotalia, Lamarck. 



170 B. clathrata, Br. One of the new species of the "Chal- 

 lenger " collection. The home of this very striking form appears 

 to be between Bass Straits and Cooks Straits, New Zealand, 

 where it was taken at four stations, with a bathymetrical range 

 of 275 fathoms. The only other note of its occurrence is at two 

 stations on the west coast of Patagonia, but the specimens from 

 the latter locality were small and not so characteristic. At 

 Muddy Creek it is moderately common in Lower Bed and very 

 common in Upper Bed. 



171. *i?. papillosa, Br. With a single exception this is only 

 known as a South Paciflc species. The Challenger Report records 

 it from eight stations, the majority of which occur in the neigh- 

 bourhood of New Guinea and northern and eastern coasts of 

 Australia. It is a rare form in the Lower Bed material, and the 

 examples are not quite so globose in outline as the type. 



172. *i?. papillosa var. compressiuscula, Br. A few not very 

 characteristic examples occur. They are really passage forms be- 

 tween the present variety and E. clatlirafa. In the recent state 

 it is usually associated with the type in distribution. Lower Bed, 

 rare. 



173. *^. calcar, d'Orb. Lower Bed, rare. 



Genus — Calcarixa, cVOrhigny. 



174. fC rarispina, d'Orb. The examples usually exhibit from 

 three to six spines. Upper Bed, moderately common. 



