202 GEOLOGY. 



Pholadomya oraxulifera, sp. nov., fig. 4. 



Testa incequilateralis, parum tumida, ovato-elongata, concenti-ice striata, 

 punctis in seriehus confertis radiantibus dispositis pulchre ornata, 

 costd dbtusd una submediand ab umhone ad marginem decurrente, 

 alidque posteriori instructa ; latere antico juxta umbones breviter 

 obliquo, tunc rotundato postico elongato, margine dorsali concavius- 

 culo ventrali convexo, extremitate posticd oblique truncatd, umbones 

 prominmtes, convergentes ; area immersa glabra. 



Long. 40, lat. 25, crass. 17 millem. 



Found uear Agula. Only two specimens were obtained. A 

 very peculiar and unusual form of Pholadomya, with radiating 

 rows of puncticulations, somewhat allied to the shell figured 

 by Buvignier as Panopcea jounctifera, Buv., from the coral rag 

 (" Statistique Geol., &c., Dep. de la Meuse," pi. ^dii. figs. 8 — 

 11). 



Pholadomya sublieata, sp. nov., fig. 5. 



Testa valde ineequilateralis, mediocriter tumida, elongato-subovata, con- 

 centnce striata, costis radiantibus subobsoletis mediants duobu^, 

 posticis confertioribus 3-4 •difficilisdme notandis, antica nulla, 

 omnibus versus marginem ventralem evanescentibiis ; latere antico 

 juxta umbones declivi, tunc rotundato, dorsali subluyrizontali, ex- 

 tremitate posticd subangulatd, margine ventrali convexo; umbones 

 parum prominentes, convexi. 



Long. 33, lat. 25, crass. 19 millem. 



Found with the last. Although much less peculiar than 

 P. granulifera, this is also a well-marked form, distinguished by 

 the few and subobsolete ribs, thus being one of the passage 

 forms between Pholadomya and Myacites. The nearest described 

 species appears to be Ph. concatenata, Agass., from the lower 

 oolite of Poland. 



