644) 



EEPOKT 18G3. 



133 b. Modiola Max.flabdlata, Gld. Northern form, somewhat broader. 



134. Adida falcata, Gld. Otia. Subgenus enlarged to include species intermediate 

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

 nestling in crypts. Q^.^Gruiieri, Phil. MS. Shape not always falcate; 

 chestnut, rugose. 



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



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



137. Lithophagus attenuatus, Desh. Maz. Oat. 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. Circum- 



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



Family Arcadce. 



141. Area midticostata, Sby. Maz. Oat. no. 181. \ -r, a .t. » 



142. Barbatia gradata, Sby. Maz. Cat. no. 194. f ^™™ Southern fauna. 



143. A.i'incea intermedia, Brod. = Barbareiisis, Conr. fossil. Closely accords witll 



the Peruvian specimens. 40-60 fm. Cp. 



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



in Midi's fig. 



Family Nwndidce. 



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



146. Acila castrensis, lids. Sulph.-fij/aKt, Baird. Subg. of Nucula with divaii- 



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



147. Leda ccelata, Hds. Sulph. Swollen, strongly sculptured ; teeth veiy numerous. 

 10-60 fm. Cp. 



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



in Mus. Cma.) = inornata, A. Ad. Cliili. 0-60fm. Cp. 

 I^eda minuta, O. Fabr. teste Hani. Circumboreal. Agrees with Norwei-ian 

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

 150. Leda fossa, Baird, P. Z. S. 1863, p. 71. Between mimda and permda. Scidp- 



ture nearly obsolete. 

 J.61. Leda hamata, u. s. Like Steenstrupi and permdoides, but very hooked, sculp- 

 ture strong. 20-60 fm. c. Q>. j r , s 



130 



1148. 

 149. 



