G1.8 



REPORT 1863. 



Subclass Pkosobbanchiata. Order Latbribeanchiata. 



Family Dentaliadtz. 



202. Dentalium (? preiiosum, Nutt. Sby. var.) liidianorum. Like entalis, with very 



fine posterior strife. 20 fm. c. Cp. 



203. Dentalium rectitis, n. s. Long, tbin, slightly curved : like ebumeum, Singapore. 



204. Dentalium semipolitum, Br. & Sby. ? = hjalinum, Phil, not Maz. Oat. no. 245. 



From Southern fauna. 



205. Dentalium hexagonmn, Sby. From Southern faima. 



Order Scutibbanchiata. Family Cliitonidce. 



206. Cryptoehiton StellerifMidi. Very large : valves hidden. Reaches Sta Cruz, Q?. 



207. Katlierina tunicata, Shj.=Douglasice, Gray. Mantle smooth, black: valves 



partly concealed. Between tide-marks, Lord. Reaches Farallone Is. Cp. 



208. Tonicia lineata,'W oodi. Closely resembling feweoZafo, Peru. Painting vai'iable. 



209. Tonicia suhmarmorea, Midd. Perhaps= lineata, var. vrithoiit lines. 



210. Mopalia muscosa, Gld. E. E.= C. wnatus, Nutt. {=armatus, Ja.j)-\-consimilis, 



Nutt. Highly sculptured: mantle crowded with strong hairs. Between 

 tide-marks, Dord. 

 .211. Mopalia Wosnessenskii, Midd. Mantle slit behind, with few hairs. Sculp- 

 tiu-e like muscosa. 



212. Mopalia Kennerleyi, n. s. = Grayi, antea, p. 603, nom. preoc. Scidpture fainter : 



olive with red : ridge angular ; post, valve waved. 

 'ZV^b.Mojjalia Kennerleyi, var. Swanii: red, ridge arched; less scidptured. 



213. Mopalia Hindsii, Gray. Olive : distinctly shagreened : flat : post, valve waved. 



214. Mopalia Simpsonii, Gray, in B.M. Col. Like Hindsii, with valves beaked. 



215. Mopalia vespertina, Gld. E. E. Shape of Hindsii, with very faint sculpture and 



slight wave. Olive clouded with brown. 



216. Mopalia lignosa, Gld. E. E. = Merckii, Midd. = Montereyensis, Cpr. P. Z. S. 1855, 



p. 231. Like vespertina, without wave : brown in streaks. 



217. Mopalia acuta, Cpr. P. Z. S. 1855, p. 232. Subgeneric, abeiTant form ; with 



small blunt plate, instead of post, sinus, between the two principal lobes. 



218. ? Mopalia sinuata, n. s. Small, raised sharp back, red and blue, engine-turned ; 



post, valve deeply notched. 



219. ? Mopalia imporcata, n. s. Pale: central areas ribbed: post, valve slightlv 



notched. Indications of sutural pores in these two species, if confirmed, will 

 require a new genus. 



