502 MAZATLAN UNIVALVES 
in the L’pool Col. (except a very few which I had secured 
before the fatal act) were, in spite of my earnest entreaties, 
subjected to the acid decorticating process for drawing-room... 
purposes. JI sawa large box of specimens, in the yard of a 
London dealer, rapidly approaching the same result by expo- 
sure to the weather. Opezculum long, thin, narrow, ungui- 
culate, nearly straight, rather concave externally: ridges of 
growth shewing through on the large inner attachment.* 
The young shell has the spire more or less exserted, stoutly 
nodulous, with the whole surface finely spirally striated : 
posterior canal rudimentary ; anterior do. very long. The 
largest sp. measures long. 8°7, long. spir. °2, lat. 6°8, div. 140°. 
Hab.—Acapuleo, Humboldt & Bonpland.—Bay of Caraccas ; 
on mud banks; Cuming.—Bay of Panama, C. B. Adams.— 
Mazatlan ; fine and abundant; L’pool & Havre Coll. 
Tablet 2408 contains 4 sp. very young: the smallest is 1°7 
by ‘9; another retains its operculum.—2409, 3 sp. adolescent ; 
the first quite smooth, blackish brown, with one broad white 
peripheral band, and about 12 narrow lines near the base; the 
second brownish black, with extremely numerous very fine 
white lines in the middle, and a few rudimentary shoulder 
knobs; the third well tuberculated, very light brown, with 
white band and lines, dark at the back of the canal.—2410, 2 sp. 
adult: the first begins banded, without tubercles, and ends 
of a uniform blackish brown, tuberculated ; the other has two 
very narrow white bands, and has commenced tuberculating 
after a serious accident to its posterior canal.—2411, the largest 
sp. with its epidermis, partially covered with Bryozoa. 
Famity MURICIDA. 
Genus FUSUS, Brug. 
Ene. Meth. p. xv, no. 45.— Phil. Handb. Conch. p. 139.— 
H. & A. Ad. Gen. vol.i.p.78.—[Non Fusus, (Humph.) 
Gray, in Proc. Zool. Soc. 1847, p. 132. | 
Colus, (Humph.) Gray, in Proc. Zool. Soc. 1847, p. 135. 
639. Fusus patirpus, Brod. gf Sow. 
Zool. Journ. vol. iv. p.378.—Zool. Beech. Voy. p. 117, pl. 36, f. 14. 
=Pyrula lignaria, Rve. Conch. Ic. pl. 9, sp. 12, f. 13, a b, teste 
Hanl. 
* None were found of the large shells: v. Fasciolaria princeps, p. 459, note. 
