174 REPORT 1856. 



Part. Page. Plate. Fig. 



5 20 Acmcea radiata, Esch. Sitcha. =■ A. persona, \xm.te%teM\&d.., non 



Phil. 

 5 20 24 1,2 Acmcea persona, Esch. Sitcha. = P. Oregona, (Nutt. MS.) Rve. 



Conch. Ic. pi. 36. sp. 112. + P. umbonata, (Nutt. MS.) Rve. 



C. I. 35. 107. + P. pileata, (Nutt. MS.) Jay, Cat. 2861. 



?= Lottia punctata, Gray : teste Midd. (non Quoy & Gaim.) 

 5 20 24 4, 6 Acmcea ancylus, Esch. Sitcha. = .4. persona, teste Midd., non 



Phil.* 

 5 20 23 7>8 Acmcea digitalis, Esch.f 

 5 21 23 5 Fissurella aspera, Esch. Sitcha. ?= F. densiclathrata, Reeve. 



Besides these, Philippi in Zeit. f. Mai. 1847, p. 113, describes Modiola 

 Calif orniensis, Esch. from a specimen brought by Eschscholtz, and by an 

 accident inscribed by him Photos Californie?isis in the Dorpat Museum. It 

 is intermediate between Lithophagus dactylus, &c, and L. cinnamomeus. 



27. The "Catalogue of the Shells contained in the Collection of the late 

 Earl of Tankerville, with Appendix containing descriptions of many new 

 species, by G. B. Sowerby, Lond. 1825," is a very interesting document, both 

 as showing how few shells from the West N. American coast were then known, 

 and also how early some of the most remarkable, as Crepidula adunca, 

 Lucapina crenidata, and others, had found their way to this country. The 

 following shells belong to our present subject of inquiry; those having page- 

 references being properly described in the appendix. 



Page. No. Page. No. 



iv. 226. Donax transversus. rare species, as we have never 



ii. 116. Mactra elegans (figured). met with another specimen." 



„ 208. Lucina punctata. Mart. hi. pi. 66. f. 733. 



„ 284. Cythereaaurantia (South Seas), xvi. 1786. Strombus granulatus. 



vi. 796. Fissurella crenulata. xx. 1792. Strombus gracilior. 



„ 808. Siphonaria gigas (Panama). xxi. 1826. Cassis coarctata. "We believe 



„ 814. Calyptroea extinctorium [non it to be a New Zealand shell." 



Lam.]. xxi. 1824. Cassis ring ens. "Forms a good 



„ 815. Calyptrcsa spinosa. genus, nearer in natural amni- 



vii. 828. Crepidula adunca. ty to Dolium, to which D.po- 



„ 1213. Haliotis Cracherodii. mum also should be referred." 



„ 1214. Haliotis Calif orniensis, and „ 1843. Purpura columellaris. 



others. „ 1844. Purpura bicostalis. 



xiii. 1418. Planaxis planicostatus (Gala- „ 1888. Monoceros cymatum. 



pagos). „ 2002. Columbella strombiformis, 



„ 1401. Turbo bicarinatus (figured). „ 2253. Cyprcea pustulata. 



xvi. 1553. Fasciolariaprinceps. „ 2263. Cyprcea radians. 



„ 1672. Murex brassica. „ 2290. Oliva porphyria. 



xix. 1703. Murex monodon, Mart. hi. pi. „ 2295. Oliva angulata. 



105. f. 980, 987. xxiii. 1984. Terebra strigata. "It is ex- 



„ 1673. Murex regius. tremely rare, only a few spe- 



„ 1675. Murex radix. cimens having been brought 



xvi. 1614. Pyrula ventricosa. "We be- from the Panama." 

 lieve it to be an extremely 



regret that Mr. Reeve, in describing the Limpets of the West N. American coast, did not avail 

 himself of the previous labours of Ksclischoltz, Middendorff and Menke in the same direction. 

 If an author professes that he cannot understand the labours of bis predecessors, he is not 

 bound to add to them; but if he builds on their foundation, without making that foundation 

 his own, he cannot expect the stability of his edifice. 



* Philippi regards A. radiata + ancylus as forming quite a distinct species from A. persona. 

 He thinks that the locality-tickets have become misplaced, and that it is really from Chili. 

 He affiliates, from type. A. punctata, D'Orb., which does not appear in the B.M. Cat., and 

 was not seen in his collection. There is no reason why the species should not reappear on 

 the Chili coast, as A. patina and S. mitra seem to do. Middendorff" confirms the northern 

 localities. 



f Judging from the figures and descriptions of this shell, I should have regarded it as the 



