ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 559 
Page. No. Pl. Fig. 
oust: SA Cistula trochlearis, Pfr. 
85 .. .. Chondropoma rubicundum, Morelet. 
36... .. Megalomastomasimulacrum, Morelet. Described from Costa Rica. 
.. 37 ..  .. Cyclophorus ponderosus, Pfr. 
.. 388 .. .. Cyelophorus translucidus, Sby. 
233. 39 26 11. Macroceramus polystreptus, un. s. 
.. 40 26 9,10. Helicina Salvini,n.s. Like H. turbinata, Wiegm. Mexico. 
41 .. .. Helcina amena, Pfr. 
42... .. Helicona Oweniana, Pfr. 
3...  .. Helicina merdigera, Sallé. Described from Nicaragua. 
44... .. Helicina Lindeni, Pfr. 
.. 45 .. ., Helicina chryseis,n.s. Mountain forests of Vera Paz. 
. 46,47,48.. .. Paludinella, 3 species apparently undescribed. 
.. “49 .. .. Pachycheilus corvinus, Morelet. Larger than in previously 
noted habitats. 
The vol. for 1863 contains Dr. Baird’s descriptions of new species from 
the Vancouver collections of Lord and Lyall, which will be tabulated, infra, 
par. 103; and the Review of Prof. Adams’s Panama shells, which has already 
been quoted. 
60. Sowerby, ‘ Conchological Illustrations, 1841.—The following are addi- 
tional localities or synonyms :— 
No. Fig. 
2 46. Cardium Indicum {is exotic ; closely allied to C. aa 
56 18. Cardiwm maculatum, Shy. Cal., &e. =C. maculosum, Shy. (preoc.). 
90 .. Murex imperialis, Swains. Cal. =M. pomum, var. Gmel. | Perhaps dis- 
tinct ; may be the W. I. analogue of bicolor. } 
91 38. Murex erythrostoma, Swains. Acapulco. [?=bicolor, var. ] 
45 102. Cyprea albuginosa, Gray. Mexico, Ceylon, {The Ceylon shell is pro- 
bably poraria, sp. 44. } 
1 45. Erato scabriuscula, Gray. Acapulco. =Marginella eypreola, Shy. 
62 40. Fissurella Lincolni, Gray,MS. {An extremely fine specimen (supposed 
“unique ”’) of Glyphis aspera, Esch. Myr. Lincoln is also quoted for 
the “finest of the four known specimens ” of Zacapina crenulata, sp. 19, 
f. 31, 38: “ Monterey.” | 
54 [Erase this line in the former Report, and substitute as follows :—] 
55 Bulimus unifasciatus, Shy. Galapagos. 
‘ Thesaurus Conchyliorum, G. B. Sowerby, &c. To the list in Rep. pp. 
288, 289, may be added :— 
Page. Pl. Fig. 
™ 51 12 23. Pecten circularis, Shy. Cal., St. Vincents. [The name may 
2 stand for the W. Indian shell, the Californian being P. ven- 
tricosus, jun. | 
57 12 20,21. Pecten latiawritus, Cony, Cal. + P. mesotimeris, Cony.” 
261 +59 = 144. TZellina sincera, Hanl. N.W. Coast America. [=Panama. ] 
: 769 165 36-38. Venerupis cylindracea, Desh. Cal.,=Petricola Californica, Conr., 
+P. arcuata, Desh.,+ P. subglobosa, Shy. 
865 179 59-77. Cerithium ocellatum, Brug. Gulf Cal., &e. =C. irroratum [C. 
; B. Ad. (Gld. MS.) ; non] Gld. K. E.,= C. interruptum [C. B. 
Ad.: non Mke, nec} Gld. 
a S Fig. 
t 47 = 45, 44. Conus* interruptus, Mawe, Wood. (Slender, coronated sp.] non 
f Br. and Sby. Hab. ?— 
* Mr. Sowerby remarks, “As the collector’s great object is to know 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 
