650 REPORT—1863. 
Nutt.) Jew. | B. A. ||Smiths, Ins. Ken. | Lord. Swan.| Cooper. 
236. Leptochiton nexus ...... =| a eet) ea ae I 
237. Acanthochites avicula ..) — | — }| — —_ —}—|]— 3 
238. Nacellainstabilis........ —|—/P —- —|VivVv = 
239. UHCORSE Derr ahs -<o.(gere —|B/D D —|—)}— MD 
240. subspiralis ........ —|—|— = =—|=—)} => I 
241, —— depicta............ —/;—]D — —|—};— D 
242. paleacea, 2z)....0%°.. —| By} — — —|—|— — 
242 b. var. triangularis ..) — | — | — — —}—-—}|— M 
243. Acmza patina .......... C}C} Cy} VFM | P| Vj} V-} FMBI 
244, Poltae Vis .oneaes C |} Cj} Cy} VFM. | P.) WV }-V-)-EMBI 
244 6. —— var. Asmi........ —|B{|—} I —}—}]— M 
245, PEPSONAY) aie}. ci sitar. D8: Oat Oar VE P fcViall-}> 2 BE 
246, CATA Vice whee tere totes Deh: Oni DIH | —}—}—J] MDI 
247, —— spectrum.......... Da} Ca) O-<)- SRDE —}—} MBD 
248. MOBACED! ferrietaiccckee. : —;}B}— — — MD 
249, Lottia gigantea ........ —|—}]} C jf FMIL | — | — MBDI 
250. Scurria mitra .......... M-} C-}PC|| VPF P- lean pals MI 
250 6 Pvar. funiculata —|—|}— — —}—}|— M 
236. Leptochiton nevus, n.s. Like asellus : scarcely sculptured : mantle-margin with 
striated chaffy scales, like Wagdalensis, interspersed with transparent needles. 
20-80 fm. Cp. 
237. Acanthochites avicula,n.s. Like arragonites, but valves sculptured in large 
snake-skin pattern, 8-20 fm. r. Cp. 
Family Patellide. 
238. Nacella instabilis, Gld. E.E. Large: shape of compressa. 
239. Nacella incessa/Hds. Sulphur. Small: Ancyloid. 
240, ?Nacella subsprralis, n.s. Shaped like Emarginula rosea, and may be a Scutel- 
lina. 10-20 fm. Cp. 
241, Nacella depicta, Hds. Sulphur. Small, long, flat, smooth: colour in rays. 
242. Nacella paleacea, Gld. Otia. Narrower, brown, striated at each end. 
242d. Nacella ? vay. triangularis. Shorter: apex raised: scarcely striated: whitish, 
with brown spots. 
Family Acemeide. (For synonyms, v. Reports in locis.) 
243. Acmea patina, Esch. Large, blackish or tessellated: with very fine distant 
striz. Between tides, Lord. ; 
244, Acmea pelta, Esch. More conical; border narrow; smooth, with blunt ribs 
often obsolete. Between tides, Lord. 
2446, Acmea ?var.-Asmi, Midd. Stout, small, black, conical. Probably an ab- 
normal growth of pelta, jun. (1 sp. beginning on pelta) Cp. 
245. Acmea persona, Esch. Smaller: apex posterior: colour blotched or freckled : 
sculpture in irregular ribs. Maz. Cat. no. 266. Var. wmbonata, arched, with 
narrow distant ribs. Var. digitalis, apex near margin. Var. textilis, apex far 
from margin, approaching pelta. 
246, Acmea scabra, Nutt. Rve. Outside with close rows of fine granules: orange- 
red tint, glossy. Var. limatula, sculpture stronger, border black: perhaps= 
Maz. Cat. no. 265. 
247. Acmea spectrum, Nutt. Rye. Flattened, with very strong ribs, irregular. 
248. Aemea (? pileolus, Midd. var.) rosacea. Pink, small: like Herm specimens of 
virginea. 
249. Lottia gigantea, Gray. Genus reconstituted: mantle with papille interrupted 
in front. Shell large, flat, dark, lustrous (= Tectwrella grandis, Smiths. Inst. 
Check List). 
250. Scurria mitra, Esch. Papille all round the mantle. White, conical: young 
sometimes faintly sculptured. In dead clam, 12 fm. Lord. 
250 b. Scurria ? var. funiculata. With rounded riblets, somewhat nodulous. 
