158 PROCEEDINGS 0]? THE GEOLOGICAL SOCIETr. [Feb. G, 



This sijecies has considerable resemblance in form and orna- 

 mentation to A. pmnila, Sow., and A. excentrka, Morr. and Lycett, 

 but differs in its larger size, greater obliquity and straightness of the 

 cardinal line, and in the more excavated dorsal margin of the anterior 

 side. This species is dedicated to Mr. Pinchin, a brother-geologist, 

 from whom Dr. Eubidge has received much assistance in his re- 

 searches. 



Log. In a grey sandy limestone, weathering yellowish, Sunday's 

 Biver {JRuhidge). 



ASTAETE LONGLANDSIANA, SpCC. HOV. PI. YIII. figS. 5 Cf, 5 h. 



Shell obovate, slightly convex ; anterior side rounded, front curved, 

 posterior side angularly truncated, hinge-line nearly straight or 

 slightly arched ; umbones depressed, obscure ; lunule lanceolate ; 

 ligamental pit narrow and deep, bounded by sharp edges that nearly 

 approach each other. Yalves nearly flat, ornamented with numerous 

 subacute, equidistant, slightly elevated ridges of growth. 



Dimens. Length 3 inches, width 2| inches, thickness | ; length 

 of anterior side 1 inch, of posterior 2 inches. 



Log. The unique specimen was found by Mr. H. Longlands (to 

 whom the species is dedicated) in a shelly band of the ^wartkop 

 Eiver limestone, October, 1859. 



Pinna Sharpei, spec. nov. PL IX. fig. 4. 



A drawing* of a Pinna found by Mr. Pinchin is comparable with 

 the figures of P. cancellata, Morris and Lycett, and P. Galliennei, 

 D'Orb. ; but as a description on such material must be incomplete, 

 I merely reproduce the drawing, and propose the specific name of 

 Bharpei, in memory of the late Mr. D. Sharpe, who described a former 

 series of South- African fossil shells. 



Log. Sunday's Eiver. 



Teigonia Cassiope, D'Orb. 



Shell ovately trigonal, longer than wide, depressed ; umbo anterior, 

 prominent, acute, recurved; the anterior border is rounded; the 

 posterior is truncated, with a large oblique flattened area, which is 

 plicated by close-set, longitudinal, denticulated ribs ; the dorsal sur- 

 face has twenty large, smooth, gracefully curved costae, separated 

 from the curved, smooth (?) keel by a transversely wrinkled narrow 

 sulcus. 



Dimens. Length 2 inches, width 1| inch, length of carina 1| 

 inch. 



This costatcd Trigonia approaches closely the well-known T. 

 costata, from which it is distinguished, however, by the greater 

 length proportionate to the width of the shell; the front also is 

 more curved, and the posterior area is less oblique. T. costata is 

 represented in the Scindian Oolites by the varieties puUa and elon- 

 gata, the former of which is closely related to T. Cassiope. I un- 

 hesitatingly refer the African shell to this European species, which 

 * Made by Mr. Stow, and presented by him to the Geological Society. 



