MAZATLAN Rileranves 407 
lide, to which family these very different-looking shells seem 
allied. The animal of Philippia is said however to be a 
Seutibranch Trochid. 
Genus TORINIA, Gray. 
H. & A. Ad. Gen. vol. i. p. 242. Shell rounded: operculum 
trochiform, as in Bifrontia. 
484. Tortnta PvaRtEGATA, Lam. 
Solarium variegatum, Lam. An. s. Vert. vol. ix. p. 99, no. 6. 
Trochus perspectiviunculus variegatus, Chem. Conch. Cab. 
vol. v. pl. 173, f. 1708-9. 
=Euomphalus radiatus, Mike. in Zeit. f. Mal. 1850, p. 170, 
no. 27. 
Comp. Solarium, sp. ind. c., C. B. Ad. Pan. Shells, p. 190, 
no. 272. 
Menke states that his shell is that of Chemnitz, but is not 
the Solarium variegatum of Lamarck as Kiener and Deshayes 
suppose. If the Lamarckian species, which is said to be from 
N. Zealand, be distinct, the name of Mke. is certainly shorter 
than that of Chemn. which is adopted however by Dillw. Rec. 
Sh. p. 783, no. 59. On avery close comparison with one of the 
Barbadoes species, (supposed to be the Lamarckian shell,) I 
am unable to detect any specific difference. Mr. Cuming has 
the same form from Isle Annaa. 
The Mazatlan shell differs from Torinia areola, Chemn. 
(=Solarium tessellatum, Desh. olim; v. Lam. An. s. Vert. 
vol. ix. p. 100, no. 8) in having a rounder base, and in not 
having the first row of granules below the suture white. Of 
this species, the locality of which was not known by Desh, I 
have a specimen answering exactly to the description from the 
W.Indies. The name is given in the Br. Mus. to a specimen 
sent from California by Lady K. Douglas. The Gulf species 
has a very rounded outline, with numerous spiral ribs of which 
generally four appear on the spire. They are rendered granu- 
lose by strong striz of growth. The umbilicus has two strong 
granulose spiral keels, which crenulate the subquadrate mouth. 
The operculum, which was preserved in four of the specimens, 
is very conical, and has about 10 turns bounded by raised 
ridges. Colour purplish brown tessellated with light. Epider- 
