ON MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 



643 



115. Lucina borealis, Linn. anct. -\-acutilineata, Conr. Widely diffused, from Coral- 



line Crag. Philippines, teste Cuming. 30-120 fm. Cj>. 



116. Qyjjtodon /lexuoms, Mont. auct. Atlantic, circumpolar. Cat. Is. 120fni. Q). 



117. Cn/ptodon serricatus, n-s. Small, circular, flat; epidermis sillten. ? Cat, Is, 



Cp. 120 fm. 



Family Diphdontidce. 



118. Diplodonta orhella, Gld. Otia.=(Jirys(a) Spli<m-ella tumida, Conr. 



Family Kelliadai. 



119. Kellia Laperousii, Desh. Woodw. Typically large, strong, transverse. 

 119 b. Kellia var. Chironii. Thinner, less transverse, margins rounded. 



120. Kellia rotundata, n, s. Larger, flatter, and less pearly than suborbicularis. 



Margin circular. 



121. Kellia suborbicularis, Mont. auct. Maz. Cat. no. 153. N. Atlantic : AV. Mexico. 



Exactly accords with British sp. 30-40 fm. Cp. 



122. Lasea rubra,'Mont. and. Maz. Cat. no. 154. N.Atlantic: W.Mexico. Exactly 



accords with British sp. 



123. Pijthini ruijifera, n. s. Large, thin, slightly indented ; teeth minute ; epidermis 



shaggy. ' 



124. Lepton meroeum, n. s. Small, shaped like Sunapta. 



125. I'ellimya tumida, n.s. ^etweea bidenfata anA substriata : ossicle minute. 



126. Pristes oblongus, n. g., n. s. Like Tellimya, with long marginal teeth, serrated 



near hinge. 



Family Mjjtilidm. 



127. Mytilus Califomianus, Conr. 9 in. long : stained ■with sienna : obsoletely ribbed. 



128. Mytilus edulis, Linn. a\xct.=trosxidi(s. Grid. Abundant on whole coast, with the 



usual Atlantic vars. Between tide-marks, Lord : also brown var. on float- 

 ing stick. 

 128 b. Mytilus ? var. glomeratus, Gld. Otia. Short, stumpy, solid, crowded. 



129. Septifer bifurcatus, Bve. Outsifle like Mytilus b. Conr. from Sandw. Is. 



130. Modiola capax, Conr. Maz. Cat. no. 170. From Southern fauna. 



131. Modiola Modiolus, Linn. auct. Circumboreal. 8-15 fm. jun. Lyall. 



1.32. Modiola fornicata, n. s. Short, swollen, like large M. marmorata ; but smooth, 



not crenated. 

 133. Modibla recta, Conr. 6 in. long, thin, narrow, rhomboidal. Chaff-like hairs 



over glossy epidermis. 



9 129 



