ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 559 



Page. No. PI. Kg. 



34 . . . . Cistula trochlearis, Pfr. 



S^ , , . . Chondropoma ruhioundum, Morelet. 



30 .. .. ilfipf/afoma.sionjasimMZaCT-ujnjMorelet. DescribedfromCostaEica, 



37 . . . . Cyclophorus ponderosus, Pfr. 



38 . . . . Cyclophorus translucidus, Sby. 

 233 39 26 11. Macroceramus polystreptus, n. s. 



40 26 9, 10. Helidna Salvini, n. s. Like H. turUnata, Wiegm. Mexico. 



41 . . . . Helicina amxna, Pfr. 



42 . . . . Helicma Oiveniana, Pfr. 



. . 43 . . . . Helicina merdigera, SaU6. Described from Nicaragua. 



44 , . . . Helicina Lindeni, Pfr. 



45 . . . , Helicina chryseis, n. s. Mountain forests of Vera Paz. 

 J .46,47,48. . . . Paludinella, 3 species apparently undescribed. 



49 . . . . Pachycheiliis cm-vinus, Morelet. Larger than in previously 

 noted habitats. 



The vol. for 1863 contains Dr. Baird's descriptions of new species from 

 ttie Vancouver collections of Lord and Lyall, which wUl be tabulated, infra, 

 par. 103 ; and the Eeview of Prof. Adams's Panama sheUs, which has abeady 

 been quoted. 



60. Sowerby, ' Gonehological Illustrations,' 1841. — The following are addi- 

 tional localities or synonyms : — 



No. Pig- ... . 



2 46. Cardium Indicum [is exotic ; closely allied to C. costatuml. 



^>Q 18. Cardium maculatum, Sby. Cal., &c. = C. maculosimi, Sby. (preoc). 



90 .. Murex imperialis, Swains. Cal. =M.pomum,Yax. Gtmel. [Perhaps dis- 



tinct ; may be the W. I. analogue of bicolor.^ 



91 38. 3hirex erythrostoma, Swains. Acapulco. [?=bicolor, var.] 



45 102. Oypreea albuginosa, Gray. Mexico, Ceylon. [The Ceylon shell is pro- 

 bably ^oraWa, sp. 44.] 

 1 45. Erato scabriuscula, Gray. Acapulco. =Marginella cyprcsola, Sby. 



62 40. Fissurella lAncolni, Gray, MS. [An extremely fine specimen { supposed 

 "imique") of Glyphis aspera, Esob. Mr. Lincoln is also quoted for 

 the " finest of the fom' known specimens " of Lxicapina crenulata, sp. 19, 

 f. 31, 38: "Monterey."] 



64 [Erase this line in the former Report, and substitute as follows : — ] 



55 Bulimus unifasdatus, Sby. Galapagos. 



' Thesaurus Coiiehyliorum,' G. B. Sowerby, &c. To the list in Eep. pp. 



288, 289, may be added:— 



Page. PI. Pig. ^ 



51 12 23. Peden circularis, Sby. Cal., St. Vincents. [The name may 



stand for the W. Indian shell, the Calif ornian being P. veu- 

 tricostis, jun.'] 

 57 12 20,21. Pectoi latiauritas. Com. Cal. +" P. mesotimeiis, Conr." 

 261 59 144. Tellina sincera, nunl. N.W. Coast America. [=Panama.] 

 769 165 36-38. Venerupis cylindracea, Desh. Cal, = Petricola Californica, Conr., 



+ P. arcuaia, Desh., + P. suhglohosa, Sby. 

 865 179 59-77. Cerithium ocellatum, Brug. GtilfOal, &c. =0. irroratinn[0. 

 B. Ad. (Gld. MS.) ; non] Gld. E. E., = C. interruptum [C. B. 

 Ad. : non Mke, neo] Gld. 

 Bp. Pig. 



47 43,44. Conus* interruptus, Mawe, Wood. [Slender, coronated sp.J non 

 Br. and Sby. Hab. ?— 



* Mr. Sowerby remarks, " As the coUeotor's great object is to Icnow the shells, I have 

 preferred, in most cases, giving the species as they stand, stating the alleged differences, 

 and leaving the final decision to individual taste." He further states, with regard to some 

 groups, that " the characters of the shells are very uncertain, and the intentions of the 

 authors still more so." The names, references, and localities are given on lists to face the 

 plates, and the diagnoses separately, with a copious index. An attempt also is made to 



45 



