CIS 



REPORT — 18C3. 



Subclass Pbosobhanchiata. 



Order Lateribbanchiata. 



Like entalis, "with very 



Family Dentaliades. 



202. Dentalium (? prett'omm, Nutt. Shy. var.) Indianorum. 



fine posterior striae. 20 fm. c. Cp. 



203. Dentalium reetius, n. s. Lonj;, thin, sliprhtly curved : like ehumeum, Sinjrapore. 



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



From Southern fauna. 



205. Dentalium hejcagonum, Sby. From Southern faima. 



Oi'der ScuTiBBANCHiATA. Family Chitonidts. 



206. Cryptochiton St eUeri,^lidi. Verylar^re: valves hidden. Reaches Sta Cruz, Q>. 



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



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



208. Tonicia li7ieata. Wood. Closely resembling /w^o/a/a, Peru. Painting variable. 



209. Tonicia submarmorea, Midd. Perhaps =/me«<a, var. without lines. 



210. Mopalia muscosa, Gld. E. E.= C ornatus, Nutt. {=armatus, Jay) -\-consimilis, 



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

 tide-marks, Lord. 



211. 3Iojmlia 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. 

 2\2b.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 



sliglit wave. Olive clouded with orown. 



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, 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 slightly 



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

 require a new genus. 



