Dr. O. Schfnidt on CoccoUths and Rhabdoliths. 359 



3. Sphceroiheriwn fraternum^ n. sp. 



Closely allied to the preceding, but with head and nuchal 

 plate coarsely punctured all over and clothed with short hairs, 

 the dorsal segments exhibiting a number of small, rounded, 

 whitish pustules. 



Length 8^ lines ; width 5 lines. 



Hob. Victoria, Australia {Dr. Howitt). One specimen. B.M. 



4. Sjyhcerotherium nigrum^ n. sp. PI. XVIII. fig. 11. 



Shining black, antennae clothed with reddish hairs. 



Head glabrous, coarsely and densely punctured in front, 

 sparsely behind ; nuchal plate delicately rugose and coarsely 

 but sparsely puuctm'ed ; dorsal segments coarsely rugose and 

 punctured, last segment densely punctured, its outer edge 

 curving outwards so as to form a distinct projecting rim j lateral 

 wings very slightly curved. 



Length 1 inch 4 lines ; width 8 lines. 



Hah. South Africa {Sir Andrew Smith). One specimen. 

 B.M. 



A remarkable species, coming nearer to S.grossunij Koch, 

 than to any other described form. 



5. Sj^hcerotherium sinuatum^ n. sp. PI. XVIII. fig. 10. 



Closely allied to S. dorsalis, Gervais {Zephronia jyulverea^ 

 White ; SipliKV other ium retusuni^ Koch), but smaller, without 

 dorsal ridge, the punctuation of the head and nuchal plate finer, 

 the lateral segmental wings curving distinctly backwards, and 

 the depression of last segment reduced to a slight sinus. 



Length 1\ lines ; width 4 lines. 



Hah. Sarawak ( IFaZ^ace) . One specimen. B.M. 



L. — On CoccoUths and Rhahdoliths. By OscAR Schmidt*. 

 [Plates XVI., XVn.] 



I MUST preface my communications upon Coccoliths and a 

 newly discovered kind of organized corpuscles from the Bathy- 

 Z>iws-mud, which I call Khabdoliths, with a short report upon 

 the course of that expedition in the lower part of the Adriatic 

 S&a during which I first made a close acquaintance with these 

 exceedingly remarkable corpuscles. 



By working up the sponges captured during the sounding 

 and surveying of the Florida coast, and incited by the English 



* Translated by W. S. Dallas, F.L.S., from the ' Sitzungsbericht der 

 k. k. Akad. der Wissenschaften in Wien,' Bd. Ixii. (1870) Abth. i. 

 pp. G69-682. 



