ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 



643 



115. Lucina borealis, Linn. auct. -\-acutilineata, Com*. Widely diffused, from Coral- 



line Crag. Philippines, teste Cuming. 30-120 fm. Cp. 



116. Ci'yptodon+flexuosus, Mont. auct. Atlantic, circumpolar. Cat. Is. 120 fm. Cp. 



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



Cp. 120 fm. 



Family Diplodontidte. 



118. Diplodonta orbella, Gld. Otia.=(J/*/) Splicer ella tumida, Conr. 



Family Kelliada. 



119. Kettia 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. Kettia suborbicularis. Mont. auct. Maz. Cat. no. 153. N. Atlantic : W. Mexico. 



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



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



accords with British sp. 



123. Pi/thin i rw/ifera, n. s. Large, thin, slightly indented ; teeth minute j epidermis 



shaggy. 



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



125. Tellimya tumida, n. s. Between bidentata and substriata : ossicle minute. 



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



near hinge. 



Family Mytilidce. 



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



128. Mytilus edidis, Linn. o,\ict.=trossulm, Grid. Abundant on whole coast, with the 



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

 ing stick. 

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



129. Septifer bifurcatus, Rve. Outside like Mytilm b. Conr. from Sandw. Is. 

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



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



132. Modiola fornicata, n. s. Short, swollen, like large M. marmorata j but smooth, 



not crenated. 



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



over glossy epidermis. 



9 129 



