0\ MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 



5G1 



In the ' Malacological and Conehological Magazine,' hy G. E. Sow^rhy, 

 London, 1838, is a monograph of Leach's genus Man/arita. The following 

 probably belong to the JN". W. Coast, and are figured in the Conch. 111. : — 



Page. 



i^5. Margarita striata, Brod. and Shy. Boreal Ocean. 



26. Marffarita undulata, Sby. Arctic Ocean. 



20. 3Iargarita costellata, Sby. [Non Brit. Mus. Col. = 3/. pupilla, Gld. ; differs in 



having the interspaces of the spiral ribs decussated. Arctic Ocean.] 

 2G. Margarita acuminata, Sby. Arctic Ocean. 

 30. Ajj/irudite columba, Lea, = Cardium Groenlandicum, 



Several West Coast species were named and figured in the elder Sowerby's 

 'Genera of Recent and Fossil Shells,' London, 1820-1824 ; a work of singular 

 merit for its time, but left unfinished*. The stock was purchased by a dealer, 

 with a view to completion ; but newer works have occupied its place, and 

 the valuable plates and text remain useless in his hands. As no dates appear 

 in the bound copy of the work, it cannot be stated whether the species here 

 named by Mr. Sowerby had been before published. The loss of the original 

 work has been in some respects supplied by the completion of the extremely 

 similar ' Conchologia Systematica,' bj^ L. Reeve, vol. i. 1841, vol. ii. 1S12. 

 It might almost be considered a second edition of the ' Genera,' of which 

 some of the plates occur in the qtiarto form. References are here given to 

 the species reproduced from Sowerby's unfinished work, which is often qucted 

 by Mr. Reeve according to the " ^^ umbers " in which it appeared : — 



Bve. I Sby. 



F'g- I^'ig- Sowerby's Genera. 



2. 2. Cumingia trigonularis. 



3. 3. Cumingia kwiellosa. 



4. 4. Cumingia coarctata. 



1. 1. Tellina opercularis ["= T.opercfilafa, Gmel.,= T. ruff>scens,Chem.,^^ Eve.l, 



1. 1. Zucina punctata [Linn., ^'■ — Lentilaria p., Schum." live. C. S.j. 



2. 2,5. Venus suhrugosa. 

 6. 7. Venus gnidia. 



2. 2. Cgfherea pJanulata. 



3. 3. Cythcrea aurantiaca. 



4. 4 [non 3]. Lithodomus cattdigertis [T,Km., = aristatus, Dillw.]. 

 3. 3. [Appears to represent attenuatus, Desh.j 



6. 6. 3Iodiola scmifusca [inside view ; exactly accords with Braziliensis, Maz, 



Cat., but is not Lamarck's species, teste Hani.]. 

 2. 2. Lima squamosa [Lam.]. 

 2. 2. Ostrea Virginica [Lam.]. 

 1. 1. Placunanomia Cumingii. ''Brought by Mr. Henry Cuming from the 



Gulf of Dulce, in Costa Rico." 



1. Lottia gigantea, Gray. Genus named mV\i\\.'TvAns. = PateUoides,Q^\ioy 

 and Gaim. ? South America. [The U. S. E. E. specimens were la- 

 belled " Valparaiso." It comes to us from many parts of tlie world, 

 but is onlv known to live in Middle and Lower California. = TccturtUa 

 grandis, Cpr., B. A. Eep. 1861, p. 137. 



3. Siphonaria Tristensi^. [The figure is singularly like the Vancouver 

 species, S. thersites.^ 



2. Crepidula ongx. 



4. Crepidula aculeata : " = P. auricula, Gmel." 



3. Calgptrcea ? extinctorium. [Sby., non Lam. The non-pitted fonn of 

 imhricata?\ 



4. Calgptrcea S2}inosa, 



* The last Part (no. 34) appeared *' March 31, 1831," many years after the previous 

 issues ; teste IlanL 



18G3. ^^ 



