MOLLUSCOUS ANIMALS. 
147 
Cyclostoma Brasiliense, t. 38 . /. 32 . Sowerby, Species Conchyliorum. Part II. 
Cyclostoma, /. 8 . 
Shell of a rather depressed orbicular form, thin, white, opaque ; whorls four or five, transversely striated, 
striae sharp and close-set; suture deep; aperture circular, peritreme thin, sharp edged; umbilicus large ; 
operculum shelly, thick, double, smooth within and with a very fine spiral line outside. 
Found in abundance in shady places near Rio Janeiro. 
LOTTIA ? PALLIDA, t. 39 ./. 1 . 
Shell conical, rather elevated, smooth, pale yellowish horn colour, obsoletely radiately striated ; vertex 
nearly central, oval, red spotted, turning towards the anterior of the shell; inside white, with a broad margin 
of the same colour as the outside. When this shell is laid upon its aperture with the apex upwards, both 
ends of the lip are slightly elevated. 
Inhabits the Coasts of the Pacific Ocean. 
I have placed this and the following species with the Lottise not without some hesitation, as I have never 
seen the animals. Martini, vol. l.f. 34. appears to be a representation of a very old specimen of this shell, 
but he speaks of it as identical with Adanson’s Gadin, which it does not resemble. 
Lottia ? COST AT A, t. 39 ./. 2 . 
Shell oval, with a slightly elevated anterior apex, and having from fifteen to twenty coarse ribs, radiating 
from the apex to the margin, some of which are more prominent than the remainder ; of a light colour, with 
interrupted dark fuscous concentric bands : inside generally of a pale colour, mottled in the center with dark 
brown, margin with many more or less deep notches between the ends of the ribs, black except at the termi- 
nation of the ribs, which are pale. 
Inhabits the coasts of the Pacific Ocean ? <?/ -'CLra-AL //■^yfee v — (P aJpjJ-a- 
This may possibly be only a deeply ribbed variety of the following. 
Lottia variabilis, i. 39 ./. 3 , 4 , 5 . 
Shell obtusely oval, with its apex more or less elevated, being sometimes very low and flat and some- 
times much raised and conical ; apex never central, generally about one third nearer to the anterior than to 
the posterior part ; the outer surface is sometimes very deeply radiately grooved, the ribs being rounded ; 
sometimes radiately ribbed with from twelve to fourteen ribs ; sometimes almost smooth, or only radiately stri- 
ated ; the colouring being in general a more or less dark olive green with nearly black angular marks irregularly 
concentrically arranged ; the internal surface is also extremely variable, being sometimes of a nearly uniform 
bright green, sometimes nearly colourless, frequently white or green and more or less varied with brown of 
various degrees of intensity ; its center is also often very elegantly mottled and speckled and varied with lines 
and spots of a very dark brown colour : the muscular impression is usually white, though not unfrequently 
mottled with brown : the margin is moreover greatly varied in its form and colouring, being occasionally 
dentated and sinuated and frequently nearly even; sometimes white, pale brown or green with black spots, 
and sometimes nearly or quite colourless. 
Inhabits the coast of Chili. 
This is one of the most variable species of Patelliform shells, both in its form and colouring. Figs. 4 & 5 
represent the most usual extremes in both respects. Fig. 3 represents an accidental monstrosity. 
Mouretia Peruviana, t. 39 ./. 6, 6. Sowerby, Zool. Proc. 1835 , p. 6. 
Found at tluasco, on the Peruvian coast. 
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