•' OS MOLLUSCA OF THZ WEST COAST OF \ORTH AMERICA. 6o5 



In his " Synopsw of the Genera Ptirapholas and Pitnitella,'' from the same 

 source, p. 335, are given as synonyms — 



Parapholas CaUfonika, Coi\r., =r/to(as C, Conr., =P/iohs Jniielh', Desli. 

 Pexttrlhi Conradi, Val., ^P'luhit pi'nita, Cour., ^Phulas concamcrntn, Desh. 

 Penitella melanura, Sby., =iPem!ella IViUoni, Conr. (not Pampho'as biailcald). 



In the elaborate hut somewhat intricate " Monoj^aph of the Order Phola- 

 dacea,'' itc, by G. W. Tryon. jun.. Phihidolphia, 1802. the followinj;: sjieoios 

 are quoted from the West C(jast, and form the conclusion of the muiiue sheila 

 hitherto described, so far as known to the writer : — 



Page. 



49. Rocellaria [GattrocJurna] ovafa. Shy. Panama, W. I., and Charleston, Sfimp- 

 gon. " Jsot the slightest difference between the Pacitic and Atlantic speci- 

 mens." 



74. Pholus { Cyrtopkura) trimcata, Say. Massachusetts ; S, Carolina ; Payta, Peru, 

 ]iitscftettberf/er ; Chili. 



77. Dadylitia {Gitocentrurn) Chiloemis, Kino-, 1832, = PA. laqueata, Sby., 1849. 

 I'eru, Chili [Panama, Jeweft]. Scarcely differs from D. Campechetisis,= 

 Ph. oblongata, Say, =Ph. Candeana, D'Orb. : Southern U. S.. W. I. 



82. JVawfl swft^/oiow. Gray, Ann. N. H. 1851, vol. v-iii. p. 385. California. ["In 

 a hole in a shell. Cabinet Grav." Neither shell nor authority stated.] 



85. Pholadidea (Hatasia) melanura, bby. Lower California, = P(e«eV<'//« Wihonit, 

 Conr., J. A. N. Sc. Ph., tig. 4 (non 5). " This error in figuring led ])r. 

 Graj' to misunderstand both the species and Conrad's idea of the genus 

 Penitella." [Vide Brit. Assoc. Rep. 1856, p. 265.] 



87. Penitella penita. [Mr. Tryon erroneously quotes (Netastoma) Danvinii, as 



well as Ph. cornea, as synonyms.] 



88. Jouannetia (Pholadopgis) pectinata, Conr., = Triomphalia pulcherrima, Sby. 



" California " [no authority], W. Columbia. 

 127, "Pholm refifer, Miirch, Mai. Blatt. vii. 177, Dec. 1860. One broken right 

 valve, //at. KealLlejos. = Dactyl ina (Gitocentrurn) CAiYowww, King [teste 

 Tryon]. 



112. The following Table contains a complete list ot all the lirolluscs which 

 have been identified, from Vancouver Island to S. Diego, nrranged so as to 

 show at the same time their habitat, and the principal collectors who hitve 

 obtained them. The species in the first column were o])taincd by Prof. 

 Nuttall; in the second, by Col. Jewett. The third cohimn (marked E.A.) 

 contains the species tabulated from other sources in the First Keport. Those 

 to the right of the double column are the fresh explorations recorded in this 

 Supplementary Report. The fourth column contains the shells brought by 

 the Pacific Railroad Expeditions, as weU as the species sent to the ofhcers ot 

 the Smithsonian Institution by the Rev. J. Rowell and their various corre- 

 epondents. The fifth column (' Ken.') contains the species of the American, 

 and the sixth (' Lord ') of the British Nort/t Pacific Boiindaiy Survey. The 

 seventh records the collections of Mr. Swan and his Indiim children ; the 

 last, those of Dr. Cooper in the Californian Geological Survey. As a largo 

 proportion of the species are as 5-et unknown, and the diagnoses will be found 

 scattered in various periodicals, some of which are rarely accessible in this 

 country, it has been judged needful to add a few words of description, with 

 references to well-known books. By this means the student will have beforo 

 him a compact handbook of the fauna, and will distinguish at a glance th« 

 range of localities, and the amount of authority for each. For the full 

 ijiionymy, the previous pages of the two Reports must be consulted. - 



121 



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