ON MOLLUSC.V OK THE WEST COAST OF NORTH AMERICA. 5»5 



The species quoted in the text from Gnerin, which appear in the Mapr. 

 Zoiil. J*>r \^-i-i, also appear here with the early date. fJlira pol/instcr, a .sutith- 

 eni form, from (luayaijuil, ic, is distinct from all varieties of the (liilf sjKcies, 

 0. Vuminjii; it bears date lUlid. In the same vol. are described and figured — « 



pint.-. 



'2. ('ah/ptr<fa ( Cali/peopsu) ruffota, Less. Payta, Peru. [ = C/*mc. inibricatntn, 



witlioiit pits.] 

 23. Cuiiits hieruylijphua, DucL Probably CaL [A Pacific forai, like C. ahhre- 



ridtii*,'] 

 27. C'l/praa efflttntina, T)nc\. Cal. [A starved var. of -4nWa «;•«///>«, Pacific Is.] 



3S. Litilif DoKfjlas (afterwards known as Lady Wijjram). — Placunaaonua 

 tepio. [The type is an old shell, with taint ribs.j 



I'hicHtmnomia alope. [The type is a young shell, with small sears and 

 faint ribs. The large series of specimens examined in the Smith.sonian col- 

 lections proves that these forms are among the many varieties of /'. macro- 

 schismn. The Indians have a superstitious dread of bundling it. Many more 

 species have since been detected in the Brit. Mus., from the late Lady 

 Wigram's valuable donations, including Mucoma inquhvita. Desh.. dcscribtu 

 from her specimens ; but, as they are evidently from mixed localities, it has 

 not been thought necessary to catalogue them. J 



;^y. NuttaJl. — The verification of Conrad's species l)eing of considerable 

 impDrtunce, I made diligent search for the original types during a recent 

 tour in the United States. The supposed collection at Harvard University, 

 Cambridge, Mass., has not been discovered by Professor Agassiz. Th» 

 inquiries which Professor Longfellow kindly made at my request resulted in 

 information that it was " in Dr. "NVyman's Mus. Xat. Hist., in the granite 

 buiiiding on Howard Street ; " but no op])ortunity has been afforded of col- 

 lating it, or even of verifying its existence. l)r. Jay rendered me every 

 assistance in studying the ty])es which he has catalogued in his coUpction, 

 now rearranging in his residence at Memironeck, near New York, and gave 

 euch dujjlicates as could be spared for the f-mithsonian Museum. Several 

 Bpccies, however, were not to be found, and some were clearlj- erroneous, as 

 e. g. Llirnna " exocpjra, Conr.," which proved to be C lobata, Brod. ; W. I., 

 teste Cuming ; China, Brit. Mus. The most satisfactory information waa 

 derived from an internew with Mr. Conrad himself at the Acad. Xat. Sci., 

 Philadelphia, where the honorary curator, Mr. "W. G. Binney, aftbrded us 

 all possible aid in eliminating types from the collections of the Academy and 

 of private conchologists in the city. Mr. Nuttall's death (the news of which 

 Was received soon after) prevented his revising the corrections thus obtained. 

 .As he had previously presented a duplicate series of his shells to the Brit, 

 llus.. which had been incorporated with the general collection, and had sig- 

 nified to me his intention to leave the unique specimens to the nation, 1 at 

 once cofhmunicated with the survivors and with Dr. Gray, who was fortunate 

 enough to stop the intended sale, and to secure the shcUs, which were kindly 

 presented by the executors. They are now mounted, and kept in draweis 

 adjoining the Reigen collection, the Vancouver collection, and the Stimp- 

 sonian typical collection of East Coast N. American shells. The foiloM ing 

 is a resume of corrections obtained from these different sources, numbered i^ 

 correspond with the list, Kep. pp. 194-201 : — 



2. " Parapholas " penita [is a Flwladidea]. 



.".. rhttyodon cancelUiius 1= Cn/ptodotUa myoides, Nutt. MS.]. 



4. Cri/ptoilon Ntdtallii, ccnr. [The author, finding the generic name preoccupied 

 changed it to Srhizothanis N. : 18.52, teste Bin. liibl. ; 1854, .Iouiti. A. X. S 

 Phil. p. l'M = LiUrar-ia capiuc, Gld.=i. maxima, Midd., = !/ > tr*M» maximm, 



11 



