ON MOLLUSCA OF THE -WEST COAST OF NORTH AMERICA. 603 



No. 



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



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



33. Yoldia amygdala. One sp. living*. 



34. Ilaminea hydatis. Two sp. living. 



35. 36. Two species of TectibrancMates, not yet worked-out by Dr. Alooct. 

 37. Torhatina eximia, Baird. Abundant, living. 



88. Cylichna (Pv^ar.) attonsa. One living sp. Probably a variety of cylindracea, 



39. Dentalium rectms, 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 sinuata, n. s. Two sp. living. [ . well-marked erout) in tbe a-enua 



44. Mopalia imporcata, n. s. Two sp. living, j " S'- V e • 



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



46. Ischnochiton (Trachydermon') Jlectens, n. s. One living sp. 



47. Ischnochiton {Trachyderm,mi) retiporoszis, n. u. One living sp. 



48. Ischnochiton {Lepidopleurus) Mertcnsii. Rare, living. 



49. Zepeta cacoides, n. s. Tbree sp. living. 



50. Calliostoma vat-iegatum, n. s. One living sp. 



51. Margarita ?Vahlii. Tbree sp. living, = M. pusilla, Jeffi'., 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, fonning a Darwinian gi'oup, 



of which var. x. suhelevata, var. ^. obsoleta, and Pvar. y. conica might pass 

 for species from single specimens. 



63. Margarita inflata, n. s. Two sp. living. 



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



lactea, but with different sculpture. 

 546. Mesalia Qlacteola, 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. 



o8. Drillia cancellaia, 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 TrevelyannS) One fresh specimen. 



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



63. Chemnitzia torquata^. Two fresh specimens. 



64. Chemnitzia tridentataf. Two fresh specimens. 



65. ISulima micans, n. s. One ft'esh specimen. 



66. Velwtina Icevigata. Several fine hving specimens. 



67. Ocinebra interfossa. Rare, dead. 



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



69. Trophon multicostaius. Two fresh specimens. 



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



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



72. 73. Two species of Oephalopods, not yet affiliated. 



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

 Califomian 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, witli 

 others, in the separate lists ; par. 116. 



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



\ These species were first found by Col. Jewett at Sta. Barbara. Fide p. 537. 



89 



