ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 603 



No. 



31. Leda minuta, Linn. One sp. living*. 



32. Yoldia lanceolata, J. Sby. Two sp. living*. 



33. Yoldia amygdala. One sp. living*. 



34. Haminea hydatis. Two sp. living. 



35. 36. Two species of Tectibranchiates, not yet worked-out by Dr. Alcock. 



37. Tornatina eximia, Baird. Abundant, living. 



38. Cylichna (?var.) attonsa. One living sp. Probably a variety of cylindracea. 



39. Dentalium rectius, n. s. Very rare, dead. 



40. Acanthopleura scabra. One young living sp. 



41. Mopalia Grayii, n. s. One living sp. 



42. Mopalia Hindsii. One living sp. 



43. Mopalia smuatan. s. Two sp. living. { A well . marked ^ ^ . 



44. Mopaha tmporcata, n. s. Two sp. living, j 



45. Ischnochiton ( Trachydermori) trifidus, n. s. One living sp. 



46. Ischnochiton (Trachydermoti) flectens, n. s. One living sp. 



47. Ischnochiton (Trachydermon) retiporosus, n. s. One living sp. 



48. Ischnochiton (Lfyidopkurus) Mertcnsii. Rare, living. 



49. Lepeta ceecoides, n. s. Three sp. living. 



50. Calliostoma varieyatum, n. s. One living sp. 



61. Margarita ? Vahlii. Three sp. living, = M. pusilla, Jeffr., teste A. Ad. 



516. Margarita (? v.) tenuisculpta. Perhaps a var. of Vahlii, but sculptured. Several 

 living specimens. 



62. Margarita lirulata, n. s. Several living specimens, forming a Darwinian group, 



of which var. . wbelevata, var. j3. obsoleta, and ?var. y. conica might pass 

 for species from single specimens. 



53. Margarita infiata, n. s. Two sp. living. 



54. Me?aUa lacteola, ?n. s. Two sp. living, but eroded. May prove a var. of 



lactea, but with different sculpture. 

 54J. Mesalia (?lacteola, var.) subplanata. Two sp. living, but eroded. 



55. Lacuna vincta. One fresh specimen. 



56. Rissoa compacta, n. s. Not uncommon, living. 



57. Drillia incisa, n. s. Two fresh specimens. 



08. Drillia cancellata, n. s. One adolescent specimen. 



59. Mangelia levidensis, n. s. One fresh specimen. 



60. Mangelia angulata\. One fresh specimen. 



61. Bela excurvata, n. s. (Like Trevelyana.} One fresh specimen, 



62. Chemnitzia (? v.) aurantia\. One fresh specimen. 



63. Chemnitzia torquata\. Two fresh specimens. 



64. Chemnitzia tridentata^. Two fresh specimens. 



65. Eulima micans, n. s. One fresh specimen. 



66. Velutina lavigata. Several fine living specimens. 



67. Ocinebra interfossa. Rare, dead. 



68. Nitidella Gouldift. Two living specimens, proving the genus. 



69. Trophon multicostatus. Two fresh specimens. 



70. Chrysodomm ?tabulatus, jun. One young sp. 



71. Chrysodomus rectirostris, n. s. One living sp. 



72 ; 73. Two species of Cephalopods, not yet affiliated. 



Besides adding more than 70 marine species to the Vancouver branch of the 

 Californian fauna, from specimens in good condition, without a single bal- 

 last or exotic admixture, the confirmation of many species, which before 

 rested only on the uncertain testimony of the U. S. E. E. labels, and the 

 affiliation of others which, on the same testimony, had been wrongly assigned 

 to distant and erroneous localities, was no slight benefit to science. The 

 land and freshwater species of the Expedition will be found tabulated, with 

 others, in the separate lists ; par. 115. 



103. While the American, naturalists were thus actively engaged in ex- 



f These species were first found by CoL Jewett at Sta, Barbara. Vide p. 537. 



89 



