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148 MOLLUSCOUS A N IM A L S .
P a t e l l a a r g e n t a t a , t. 3 9 . / . 7 .
Shell depressed, conical, somewhat elliptical, radiately ribbed, dark yellowish brown outside, silvery
white w ith in : apex slightly an te rio r; the ribs rather irregular and occasionally ru g o s e : margin slightly and
irregularly dentated.
F ound on rocks a t Valparaiso and other parts of the coast of C hili.
P a t e l l a M a z a t l a n d i c a , t. 3 9 . / . 1 2 , 1 2 .
Shell ra th e r depressed, conical, somewhat elliptical, radiately ribbed, with nodulose ribs, of a dull
greenish gray, frequently with black spots outside, whiter inside and somewhat pearly, sometimes with a
white and sometimes with a dark brown c e n te r : apex slightly an te rio r; margin irregularly toothed.
Inhabits the coast a t Mazatlan.
This species varies much in the numbe r and closeness of the radiating ribs, as well as in the size o f the
nodules upon them. I t sometimes measures nearly three inches in length.
F i s s u r e l l a l a t i m a r g i n a t a , t. 3 9 . / . 8 . Sowerhy, Zool. Proc. 1 8 3 4 , p . 1 2 6 .
Conch. Illu str. Fissurella, f . 6 9 .
In h ab its—found on the rocks a t Valparaiso and Iq u iq u i..
F i s s u r e l l a C RA S SA . L a w . i . 3 9 . / . 9 .
F . crassa. Lam. H is t. nat. des anim. sans vert. vi. P a r t I I . jp. 1 1 . Sowerhy,
Conch. Illu str. Fissurella, f . 9 , 1 1 .
F . Clypeiformis. Sowerhy, Tank. Cat. app. p . vi.
F o u n d abundantly a t Valparaiso.
In F U N D IB U L U M RADIANS, t. 3 9 . / . 1 0 .
Trochus radians. Lam. H is t. nat. des anim. sans vert. V I I . p . 11.—Encycl.
method, t, 4 4 5 . / . 3 .
Calyptrsea radians. Nonnull.
F ound abundantly a t Valparaiso, Coquimbo and a t other places on the shores o f the Pacific. The locality
given by L amarck, namely, the Antilles near Guadaloupe, must be erroneous.
IN P D N D IB U L D M RA D IA N S . V a r. t. 3 9 . / . 1 1 .
A remarkable variety with an unusually elevated spire.
C a l y p t R u E A s t r i g a t a , t. 3 9 . / . 1 3 . Broderip, Trans, o f Zool. Soc. I . pi. 2 8 . / .
1 2 . p . 2 0 6 .
C h it o n H e n n a h i , t. 4 0 . / . 1 . Gray, Spicilegia Zoologica, p . 6 . no. 1 1 .—Sowerhy,
Conch. Illu str. Chiton, / . 1 . 3 3 .
F ound abundantly in the Bay o f Callao.
C h it o n J a n e i r e n s i s , t. 4 0 . / . 2 , Gray, SpicilegiaZoologica, p .6 . no. 9 . i . 3 . / . 8 .
Inhabits R io Janeiro.
. C J