158 PEOCEEBINGS OP THE GEOLOGICAL SOCIETY. [Pob. 6, 



large and concentrically rugose ; the posterior one small, tlie stria- 

 tions of the valve are continned upon it. 



Dimens. Height -J of an inch ; breadth |- of an inch. 



P. projectus is closely related by its general outline and orna- 

 mentation to P. lens, Sow., and P. arcuatus, Sow., of the Lower and 

 Middle Oolites of Europe ; but the obliquity of the shell and the 

 relatively excentric position of its apical portion are characters by 

 which P. jprojectus is at once separated from them. 



P. projectus is allied in form to an undescribed species which I 

 have collected in the upper beds of the Inferior Oolite at Cold Com- 

 fort, near Cheltenham, and which I propose to call P. Tylori ; the 

 latter, however, is more depressed and smooth, except near the 

 margin, where the shell is concentrically striated and crossed by 

 radiating sharp indented lines. P. Tylori is a shell that has been 

 confounded, I beheve, with P. cinctus, Sow., which belongs to the 

 Lower Greensand aild not to the Inferior Oolite. 



Loc. Collected by Dr. Eubidge in a soft, yellowish- grey, sandy 

 limestone at the Zwartkop Eiver Heights, and at Prince Alfred's 

 Eest ; in both localities it is frequent. 



Lima neglecta, spec. nov. PL YII. figs. 5 a, 5 h. 



*' Lima, sp. (undeterm.)," Sharpe, Trans. Geol. Soc. 2nd ser. vol. vii. 

 p. 201 (1856). 



Shell oblong, transverse, slightly convex, ornamented with nume- 

 rous acute ribs, the sides of which are longitudinally striated, two or 

 three stronger strise occupy the central portion of the interspace; 

 nnder a magnifying glass the surface is seen to be covered with 

 closely set, regular, transverse striations. 



Dimens. Height | of an inch, breadth -| of an inch. 



L. neglecta belongs to a section of the genus exemplified by 

 L. duplicata. Sow., in the Oolites, and L. parallela. Sow., in the 

 Lower Greensand. 



Log. In a grey, coarse-grained, sandy and shelly limestone, 

 Sunday's Eiver {Ather stone), 



Lima OBLiQTJissiMA, spec. nov. PI. IX. fig. 5. 



Shell elongated, depressed, very oblique, umbo acute ; hinge-line 

 obliquely truncating the shell ; the whole surface ornamented with 

 narrow waved sulci, interspaces punctated. 



Dimens. — Height 1 inch ; breadth -J of an inch. 



In its elongated and oblique form, L. ohliquissima resembles 

 several Jurassic Limce ; in the character of its sulcations it approxi- 

 mates to L. r igidula, ^hil. ; in its punctated surface it is allied to 

 L. ovalis, Sow. ; it is, however, characterized by the broad and flat 

 ribs, and the narrow interstitial spaces, angularly waved and 

 punctated. 



Loc. In a yellow shell-rock from the Zwartkop Eiver Sandstone, 

 and with Fla^unopsis undulata and fossil wood (Biihidge). 



