No. 6. 
REPORT UPON THE MOLLUSCA COLLECTED ON THE SURVEY. 
BY WILLIA.M COOPER. 
Class MOLLUSCA.— Shell-fish. 
Family MURICIDAE. 
MUREX FOLIATUS. 
Murex foUatus, Gjiel. Desh. Reeve, C. J. Ill, 12. 
Murex monodon, Escii. Zool. Atlas, Pt. II, p. 10, pi. 9, 10, f. 1, 1829. 
Cerastoma monodon, Carpenter, Report to Brit. Assoc. 1856, p. 345. 
Cerattcnia foliatwn, Idkm 1. c. 
Uuh. — Sitcha ; Escbscboltz. Oregon ; Kellett and Wood in Carp. p. 241. San Diego, (fossil?) ; Mr. Cassedy. 
Sent from San Diego by Mr. Cassedy. Like others from the same locality which have been 
also found living, and some very remarkable species that have not, these specimens have the 
appearance of fossil shells. Eschscholtz collected it at Sitcha, in lat. 58°, as quoted by Reeve, 
though the name he gives is omitted by the latter. 
MUREX PESTIVUS. 
Murex fesfivus, Hinds, Zool. Sulphur, pi. 3, f. 13, 14. — Reeve, C.I. Murex, pi. x.wi, f. 114. 
rteronotus festivus, Carp. Rep. Brit. Assoc. 1856, p. 345. 
Hab. — Bay of Magdalena ; Hinds. San Diego ; Mr. Cassedy. 
This well marked species, which was dredged alive by Mr. Hinds in the Bay of Magdalena, 
is found of much larger size at San Diego. Only dead shells were sent, appearing like fossil 
or much Aveathered shells, but otherwise they entirely agree with Reeve's figure. 
TRITON OREGONENSE. 
Triton oregonertfe, REDriELD, in Ann. Lyceum of Nat. Hist, of New York, IV, p. 165, pi. II, f. 2, (young?) 1839. 
Trilonium (Buccinum) cancellatum, Middendokkf, Beitrage, II, p. 164, pi. Ill, f. 1-4, (adult and young,) excl. syn. 
Lam. 1849. 
Fusus oregonejisis, Reeve, C. I. pi. xvi, p. 61, (young,) 1845. 
Fusus cancellatus, Reeve, 1. c, p. 62, (adult.) 
Tri(07i oregoncnse, Gould, U. S. Expl. Expcd. Moll. & Shells. 
Triton cancdl'^ium, {oregonense, ) Carp. Rep. p. 338. 
Hah. — Straits of Juan de Fuca ; Ur. Suckle} , Mr. Gibbs, Dr. Cooper. Unalashka ; Middendorff. Kamtschatka ; Reeve. 
Among the specimens from the Straits of De Fuca is one adult shell, exhibiting the tooth or 
fold on the upper part of the columella, as it appears in Middendorff' s plate, the absence of 
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