Jan. 1, 1870.J 



HARDWICKE'S SCIENCE-GOSSIP. 



11 



extended at their outer edge into a sharp keel, 

 giving the appearance of a narrow border running 

 round the shell " (fig. 22). 



Another species (P. Haidengerii) is known on 

 these shores, but the foregoing will represent the 

 genus. 



Fig. 23. Anomallna coronata. 



Aiiomalina coronata (Parker & Jones), from the 

 Shetland diedgings, seems also to be common all 

 along the coast of Norway, and plentiful in the 

 Mediterranean Sea at ninety fathoms. "This shell 

 has the general aspect and bearing of the common 

 Truncatulina, but it is not depressed, and affects a 

 bilateral symmetry, the two surfaces being often 

 nearly equal. The umbilici are deeply and broadly 

 sunken, forming an almost ridge-like crown on each 

 face of the shell. The aperture is a transverse chink 

 at the base of the chamber."— (Parker & Jones.) 



It has also been found fossil in the Tertiaries of 

 Prance (fig. 23). 



Fig. 24. Puloinulina rcpunda. 



Pulvinulina repanda (P. & M.) is the species 

 called Rotalina concamerata by Williamson. This is 

 certainly a beautiful form, and Mr. Parfitt states in 

 his catalogue of the Protozoa of Devonshire that he 

 has found it on oysters dredged off the^South coast. 

 It is probably not uncommon (fig. 24). 



form, found in a starved condition about the Shet. 

 lands, but apparently common in the chalk of Meck- 

 lenburg, where it was first detected by Professor 

 lleuss (fig. 25). 



Fig. 26. Rotalia Becnarii. 



Rotalia Beccarii (Linn.) is affirmed to be the most 

 common of British Poraminifera, occurring in varying 

 degrees of abundance on every part of the coast. 

 The species has a very wide geographical range, but 

 each locality appears to be characterized by the pre- 

 valence of some one variety. This also appears to 

 be readily obtained from oyster-shells by carefully 

 washing them, a plan which Mr. Parfitt has 

 certainly adopted with considerable success 

 (fig. 26). 



Fig. 25. Pulvinulina Karsteni. 



Pulvinulina Karsteni (Reuss) certainly is a rare 



V 



Fig. 27. Eotalia orbicularis. 



Rotalia orbicularis (D'Orb.) is considered by 

 some authors as only a deep-sea variety of the last- 

 named species. Although common in deep water 

 in the Red Sea and the Mediterranean, it seems to be 

 as rare on our coasts as the other species is com- 

 mon, since it is only recorded from the Shetlands 

 and the Irish Sea. " It is a thickened rotaline form 5 

 presenting in profile a trochoid appearance, rising 

 to a point on the upper, and very convex on the 

 lower surface. The septal face is narrow, and shows 

 few or no perforations." — (Brady.) The diameter is 

 r^oth of an inch (fig. 27). 



Nonionina turgida (Will.), the Rotalina turgida of 

 Williamson's monograph, is probably a very common 

 northern species, abundant around the Shetlands. 



