ON MOLLUSCA OF THE WEST C3AST OF NORTH AMERICA. 679 



20. Sphfrrinm occidentale, Pr.. Proc. A. N. S. Phil. 18fiO, p. •2!1.'>, = C. oralii, Pr., 



liost. Proc. l8o2, p. 27(5 (noin. pieoc.), = ' Sph. ora/f/.Stn.." \M. (4f>n. vol. ii. 



f. 450. Hub. New York to Georgia : Vermont to Wiscoii.sio : ILjll-gate 

 liver, W. T. 



21. Sphcprinm twbile, Gld. (Cuclas n.), Boat. Proc. 1855, p. 229 TOtia, p. 2181. San 



Pedro, Webb. r . r . 



22. Sp/uerinm patella, Gld. (Ci/clasp.), Bost. Proc. 1850, p. 292 [Otia, p 80: E. E. 



Moll. f. 527, tvpe not returned to S. I.] Orejron. 



23. SplifPrixm Spokan't, Baird [P. Z. S. 1803, p. GO, f. 12. 13 : anfea, p. fiOo\ B. Co\ 



24. ^phceriiim tttmidinn, Baird [P. Z. S. 1803. p. (59, f. 11 : antfit, p. 005 \' B. Col. 



25. Sphferiinn meridionale, Pr., Proc. Ac. N. S. I'hil. 1801, p. 414. I'aiiania : Mud. 



I'rime. 

 20. Sphariinn Itnticula, Gld. (Liicina * I.), Bost. Proc. 1850, p. 250. California. 



27. Sp/ufriinn subtransversum, Pr., P. Z. S. 18()0, p. 322. Mexico. 



28. Pmdinm abditum, llald. [?ubi]= ('yc/rtx miim; C. B. Ad. Bo<t.Proc. 1841. p 48, 



= P. obscurum, Pr., Bo.st. Proc.'lSol, p. 101. + P. Kurfzii, Pr., p, lti2. -t-P. 

 zonatum, Pr.,p. 102, + P. regulare, Pr., Bost. II. vi. .303, pi. 12. f. 11-13. 1>!52, 

 + P. nofatum, Pr., Bost. II. vi. 305, pi. 12. f. 20-22, 1852, + P nmnhr.n + P 

 resartum, Injralls, MS.,+ P. rttbrum+P- plenum, Lewis, MS., +P. retmiim, 

 Pr., P. Z. S. 1859, p. 322. 



29. Piiidiiim occidentale, Newc. [Proc Cal. Ac. Nat. So. 1801, p. 94\ San Fran- 



cisco, Powell. 



120. Of the tertiary fossils th. wing light on existing species no r.i^di- 

 tional information has yet been publi.shed. "We cannot but hope thut tLo 

 researches of Mr. Gabb, on the fossils collected by the Californiaii (Jeoloj;ical 

 Survey, will develope relations of great interest between the existing and 

 former conditions of the continent. The Astorian fossils doscvihcd by Mr. 

 Conrad from the U. S. Exploring Expedition (vol. x.. Geology, Philadelphia, 

 1849;, and tabulated in the first Report, p. 'M7, belong to the Smithsonian 

 Institution, but were not discovered there in 1800. All of them, however (in- 

 cluding the indeterminate species), are figured in the atlas of ]>lates. They 

 resemble the fossils of the Pacific Kailroad Expeditions in being very imper- 

 fect, for which reason the following criticisms may prove erroneous. The 

 general aspect of the collection betokens the Miocene period. 



Ml/a abriipta, Conr., may be the young of Glycimeris getierosa, Gld. 



Thrncia trapczoides, Conr., may be ciirfa, Conr. 



iSolemi/a ventricosa, Conr., has the aspect of a large Laznria. 



Tellina arctata, Conr., closely resembles Maoma, \ar. expatisa, 



TMina emacerata, Conr., is ptiliaps Hoder/eiisis. lids. 



Lucina acutilineata, Conr., appears to be borealis, Linn. 



Cardita subtenta, Conr.,= Venericardia borealis, Cour. 



Kuctda divaricata, Conr., = Acila castrensi^, lids. 



Pectnnculus pattdus, Conr., may be sentoitrionalis, Midd. 



Pectunculus nitens, Conr., resembles Psephis tantilla, Gld. 



Pecteti pro/mtulus, Conr. A very fine specimen, enclosed in a large nodule 

 from Oregon, was presented to the Brit. Mus. by Mr. C. Pace. If nut identical 

 with Amusium caurintim, Gld., it is most closely allied, especially to the 

 Japanese form. 



• Mr. Prime assigns no reason for changing Dr. Gould's Lucina into a Ci/clns, nor any 

 authority for " California." Ho was, perhaps, misled by the artist's engraved references to 

 tlie figures 528, a, h, where he has drawn a rule, referring to the Cyclades shove, insteiid of 

 writing Lu<:ina. It is assigned to "?Coast of Patagonia"' in 'Otia.' p. 03, and t) "?R. 

 Janeiro" in ' E. E. Moll.,' p. 414. In each place the shell is compared to an Af^arfe cr 

 Ctiprina, with Uteral teeth. The type was not returned to the Smithsonian Institution; 

 but the diagnosis sUtes that it is "chalky, thickened within t!ie deej) and jaggi'd pallial 

 hne, sculpture faint but decussated, and margin finely erenulated,"— charaetei-s mc ro con- 

 sistent with Lvetnn. ■. r. Mt/rtaa, than with Cyclaa. If the type cannot be recovered, per- 

 haps tlie specie* may be dropped, as il ie not the Lucina {Mj/riua) itnticula, Kve. 



165 



