ox MOLLUSCA OF THE AVEST COAST OF XORTH A^VIKBTCA. 



643 



115. Lucina borealis, Linn. &vici.-\-acutiUnenta, Conr. Widely diffused, from Coral- 



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



116. Cryptodon flexuosus, M.oni. &nct. Atlantic, circumpolar. Cat. Is. 120 fm. Qj. 



117. Cryptodon serricatus, n. s. Small, circular, flat ; epidermis silken. ? Cat. Is. 



Cp. 120 fm. 



Family Diplodontidte. 



118. Diiilodonta orbella, Gld. Otia,. = (3Iysia) Sphcerella tumida, Conr. 



Family Kcllindo'. 



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

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



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



Margin circular. 



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



E.xactly accords with British sp. 30-40 fm. Cp. 



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



accords with British sp. 

 128. Pi/tJiin I ruyifera, n. 3. Large, thin, slightly indented ; teeth minute ; epidermis 

 shaggy. 



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



125. TeUimija tumida, n. s. Between biilentnta and suhstriaia : ossicle minute. 



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



near hinge. 



Family Mj/tilidee. 



127. Mytilus Califomianus, Conr. 9 in. long : stained w\th sienna : obsoletely ribbed. 



128. Mytilus edulis, Linn. B.nct.-^tro.'isulus, Gld. Abundant on whole coast, with the 



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

 ing stick. 

 1 38 b. Mytilus ? var. ylomeratus, Gld. Otia. Short, stumpy, solid, crowded. 



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

 1'jO. Modiola capax, Conr. Maz. Cat. no. 170. From Southern fauna. 



l!l. Modiola modiolus,\ATaQ.. auct. Circumboreal. 8-15 fm. jun. Zya//. 



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



not crenated. 



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



over giossj- epidermis. 



9 129 



