644 



REPORT 18C3. 



VVib. Mo.ii()1a var. flabt-llata 



I'U. Adiila falcata 



1.J5. stvlina 



l;}t). Lithopfeagus plumula. . 



137. attenuatiis 



138. Modiolaria Isevij^ata . . 

 1.39. marmorata 



140. Crenella decussata . . . . 



141. Area multicostata .... 



142. Barbatia gradata 



14-3. A.vinsea intermedia 



144. var. subobsoleta . . 



145. Nucula tenuis 



146. Acila castrensis . . 



147. Leda caelata 



148. ciineata 



140. niinuta 



150. fossa 



151. hamata 



Nutt. Jew. I B. A. 



M 



B 



V 

 M 



Smiths. In . 



VP 



FM 



OF.M 



M 



H 



D 



ODI 



Krn. Lord. Swan. 



P 

 P 



P 

 P 



P 

 P 



V 



V 

 V 



Coopt r. 



D 

 D 



D 

 MDI 



I 

 MD 

 MDI 



BI 



133 6. 3fodiola vex.Jlahellata, Gld. Northern form, somewhat broader. 



134. Adida falcita, Gld. Otia. Subgenus enlarged to include species intermediata 

 between Modiola and Lithophagus : shape of latter, byssiferous like foiiaer, 

 nestling in crypta. Sp. = GrMMm, Phil. MS. Shape not always falcate: 

 chestnut, rugose. 



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



13(1 Lithophagus plumula, Hani. Maz. Cat. no. 175. From Soutliern fauna. 



137. Lithophagus attetiuatiis, J)>ish. Maz. Cat. no. 173. From Southern fauna. 



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. Cu'cum- 



boreal. 10-40 tm. not r. Cp. 



Family Arcada. 



141. Area multieostata, Sby. Maz. Cat. no. 181. | ^^ a j.-, p 



142. Barbatia gradata, Sby. Maz. Cat. no. 194. ( ^""""^ Southern fauna. 



143. A.iin<ea intermedia, Brod. = liarharemis, Conr. fossil. Closely accords with 

 the Peruvian specimens. 40-60 fm. Cp. 



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

 in Midd.'8 fig. 



144. 



Family Nuculidee, 



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



146. Acila castrensis, Hds. Suifh.-\- Lgalli, Baird. Subg. of Nucidn with divari- 



cate sculpture ; onlv known in Crag and N. Pacific. 40-00 fui. Cp. 



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



10-60 fm. Cp. 



148. Leda cuneata, Sby. D'Orb. teste Hani. (Scarcely differs from commutata, Phil. 



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



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



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



150. Leda fossa, Baird, P. Z. S. 1863, p. 71. Between minuta and pemula. Sculp- 



ture nearly obsolete. 



151. Leda hamata, n. s. Like Steenstrvpi and pernuhides, but very hooked, sculp- 



ture strong. 20-60 £m. c. Cp, 



130 



