C48 



REPORT 18G3. 



Subclass PROSOBBANCHIATA. Order LATERIBRANCHIATA. 



Family Dentaliadce. 



202. Dentalium (? pretiosum, Nutt. Sby. var.) Indianorum. Like entails, with very 



fine posterior strise. 20 fm. c. "Cp. 



203. Dentalium rectius, n. s. Long 1 , thin, slightly curved : like ebumeum, Singapore. 



204. Dentalium semipolitum, Br. & Sby. ? = hyalinum, Phil, not Maz. Cat. no. 245. 



From Southern fauna. 



205. Dentalium hexagonum, Sby. From Southern fauna. 



Order SCUTIBRANCHIATA. Family Chitonida. 



206. Cryptochiton Stelleri, Midd. Very large : valves hidden. Reaches Sta Cruz, Cp. 



207. Katlierina tunicata, Sby. Douylasice, Gray. Mantle smooth, black: valves 



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



208. Tonicia lineata, Wood. Closely resembling lineolata, Peru. Painting variable. 



209. Tonicia submarmorea, Midd. Perhaps= lineata, var. without lines. 



210. Mopalia muscosa, Gld. E. E.= C. ornatus, Nutt. (armatus, Jay) -j-c0wsi'/m7ts, 



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

 tide-marks, Lord. 



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



ture like muscosa. 



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



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

 2I2b.Mopalia Kennerleyi, var. Swanii: red, ridge arched; less sculptured. 



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. = Monterey ensis, 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, aberrant 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 slightly 



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

 require a new genus. 



