644: REPORT—1863. 
154. 
Nutt.| Jew. | B. A. |/Smiths. Ins.; Ken.| Lord. Swan.| Cooper. 
133 6. Modiola var. flabellata...) — | — | V VP P|—!|V = 
134. Adula falcata ...,...... == |-Mi-} -M FM — — D 
135. [oy lili eee ie ecksc == |---| ORM . | — P= == 
136. Lithophagus plumula....}| — — M — — D 
137. attenuatus ........ — | —+-L I et | == 
188. Modiolaria levigata ....)| — | — | — a Pil VV — 
139. marmorata .,...... ane — i — Pa == — 
140. Crenella decussata ...... ye — —|—|— I 
141. Arca multicostata ...... — — D — | — | — — 
142. Barbatia gradata........ — — —_ —}—|]— D 
143. Axineea intermedia ....| — — — —}|—}]—| MDI 
144. var. subobsoleta....| — | — | — ODI —};—|Vv — 
145. Nucula tenuis .......... — | — | — — Pie) = a 
146 Acila castrensis ....| — | — — Psy I 
147) Deda exelata: 1 Cas Pe ot es = WB iF — —|—}]— MD 
148. CUNEALA Yh ates « —|— — —|—}]— MDI 
149, —— minuta............| — | — | — ||  -— FE (SEES eee = 
150 HOBSH ele ates cite aioe —|—|— — P| oy) = 
L5t —— hamata! i... .8i 7. — |} — | — — —|— |} — BI 
133 6. Modiola vay. flabellata, Gld. Northern form, somewhat broader. 
Adula falcata, Gld. Otia. Subgenus enlarged to include species intermediate 
between Modiola and Lithophagus: shape of latter, byssiferous like former, 
nestling in crypts. Sp.=Gruneri, Phil. MS. Shape not always falcate : 
chestnut, rugose. 
. Adula stylina, n.s. Shorter, broader; epidermis brown, glossy. 
. Lithophagus plumula, Wanl. Maz. Cat. no. 175. From Southern fauna. 
. Lithophagus attenuatus, Desh. Maz. Cat. no. 173. From Southern fauna. 
. Modiolaria levigata, Gray. Exactly accords with Atlantic specimens. Cir- 
cumboreal. 
. Modiolaria marmorata, Fbs, & Hanl. Exactly accords with Atlantic speci- 
mens. Circumboreal. 
. Crenella decussata, Mont. Exactly accords with Atlantic specimens. Circum- 
boreal, 10-40 fm. not x. Cp. 
Family Arcade. 
- Arca multicostata, Shy. Maz. Cat. no. 181.| y, oni anni 
. Barbatia gradata, Sby. Maz. Cat. no. 194, ( ~ "OM POUbne™ Zauna, 
. Axinea intermedia, Brod. = Barbarensis, Cony. fossil. Closely accords with 
the Peruvian specimens. 40-60 fm. Cp. 
. Avinea (? septentrionalis, Midd. var.) subobsoleta, Sculpture much fainter than 
in Midd.’s fig. ; 
Family Nuculide. 
Vucula tens, Mont. auct. Agrees with var. lucida, Gld. Circumboreal. 
. Acila castrensis, Hds. Sulph.+ Lyall, Baird. Subg. of Nucula with divari- 
cate sculpture ; only known in Crag and N. Pacific. 40-60 fm. Cp. 
. Leda celata, Hds. Sulph. Swollen, strongly sculptured: teeth very numerous. 
10-60 fm. Cp. 
. Leda cuneata, Sby. D’Orb. teste Hanl. (Scarcely differs from commutata, Phil. 
in Mus. Cum.) =znornata, A. Ad. Chili, 0-60fm. Cp. 
. Leda minuta, O. Fabry. teste Hanl. Circumboreal. Agrees with Norwegian 
specimens of ‘‘ caudata, Don.” teste M‘Andr. 
. Leda fossa, Baird, P. Z.S. 1863, p. 71. Between minuta and pernula. Sculp- 
ture nearly obsolete. 
. Leda hamata,n.s. Like Steenstrupi and pernuloides, but very hooked, sculp- 
ture strong. 20-60 fm, ce. Cp. 
