644 



REPORT 18G3. 



133 b. 3IocUola \bx. flabellata, Gld. Northern form, somewhat broader. 



134. Adula falc ita, Gld. Otia. Subgeuiis enlarged to include species intermediate 



between Modiola and Lithuphagiis : shape of latter, byssiferous like fonner, 

 nestling in crypts. Sp. = G-Vj«ier», Phil. MS. Shape not always falcate: 

 chestnut, rugose. 



135. Adula stylina, n. s. Shorter, broader ; epidermis brown, glossy. 



136. Lithophacim plumula, Hani. Maz. Cat. no. 175. From Southern fauna. 



137. Lithophagus attenuatiis, Desh. Maz. Cat. no. 173. From Southern tauna. 



138. Modiolaria Icevigata, Gray. Exactly accords with Atlantic specimens. Cir- 



cumboreal. 



139. Modiolaria marmorata, Fbs. & Hani. Exactly accords with Atlantic speci- 



mens. Circumboreal. 



140. Crenella decussata, Mont. Exactly accords with Atlantic specimens. Cii'cum- 



boreal. 10-40 £m, not r. Cp. 



Family Arcades. 



141 Area muUicostata, Sby. Maz. Cat. no. 181. 1 p^.^^ Southern faima. 



142. Barbatia gradata, Sby. Maz. Cat. no. 194. ( 



143. A.iiiicea intermedia, Brod. = Barbarensis, Conr. fossil. Closely accords witTl 



the Peruvian specimens. 40-60 fm. Op. 



144. Arincea (? septentrionalis, Midd. var.) subobsoleta. Sculpture much fainter than 



in Midd.'s fig. 



Family Nuculidce. 



145. Nucula tenuis, Mont. auct. Agrees with var. lucida, Gld. Circumboreal. 



146. Acila castrensis, Hds. Sulph.+i?/«^/«, Baird. Subg. of Nucula with divari- 



cate sculpture ; only known in Crag and N. Pacific. 40-60 fm. Cp. 



147. Leda cceluta, Hds. Sulph. Swollen, strongly sculptured : teeth veiy numerous. 



10-60 fm, Cp. 



148. Leda cuneata, Sby, D'Orb. teste Hani, (Scarcely differs fi-om coinmutata, Phil. 



in Mus, Cum.) = inornata, A. Ad. Chili, 0-60 fm. Cp. 



149. Leda minuta, O. Fabr. teste Hani. Circumboreal. Agrees vnth. Norwegian 



specimens oi " caudata, Don." teste M'Andr. 



1-50. Leda fossa, Baird, P. Z. S. 1863, p. 71. Between minuta audi pernula. Sculp- 

 ture nearly obsolete. 



151. Leda hamata, n. s. Like Steenstrupi and pernuloideS) but very hooked, sculp- 

 ture strong. 20-60 fm. c. Cp. 



130 



