122 MO L LU SCO U S A N IM A L S .
H a r p a r o s e a c r e n a t a , t. 3 4 . f . 5 .
Harpa crenata. Swainson. Ap p . Bligh. Cat. 5.
In h ab . Pacific Ocean.
Lesson in the Illustra tions of Conchology has given it another name.
H a r p a m in o r b . g r a c i l i s , i . 3 6 . / . 1 7 .
Harp a gracilis. Brod. Sow. Zool. Journ. iv. 373.
T h is shell, o f which I have seen three or four specimens, is certainly only a small slender variety of
H . m inor. T h e specimen figured is in m y private collection ; it is ra the r la rg e r than Mr. Bland’s, noticed by
Mr. B roderip. Length, 1 inch, 2 lin e s ; diameter half an inch. I n colour and form it exactly agrees with the
type species.
PU R P U R A .
The mantles en d in a short groove in front, which slightly extends beyond the shell when the animal
walks, and is furnished with a short groove b ehind. T h e foot short, longest in front. The tentacles are long,
line a r, d ila ted and united together a t the ir base, as i f they sprang from the same place, as long as the front of
the foot, with the eyes placed a little above the middle of the ir outer side. The operculum is horny, and
bends so as to fit the p illa r ; and when the animal is walking it is placed against the w orn p a rt o f th e pillar lip.
Montagu observes tha t the ends o f the tentacles as far as the eyes are retractile, in the same manner as
those o f the snail. I have often examined the animal alive, b u t have n ot observed this fact. ^
The egg o f the common P . L a pillus has been described unde r the name o f H y d r a tritícea.
O u r species is found on rocks, often quite as high as high-water mark, so tha t they are o ut of the water
the greater p a rt of their lives. . . j v u
Adanson in describing the animal of this genus observes tha t the two sexes can be distinguished by the
ventricoseness o f the shell, an idea tha t ha s been adopted by D e Blainville.-
P u r p u r a c r a s s a . Blainv. Mon. t. 1 2 . / . 4 .
P u rp . melares. Duelos. An n . Sci. N a t. t. 1. / . 2.
Inhab. Peru.
P u r p u r a c l a t h r a t a . Blainv. Mon. t. 12. f . 6 .
P u rp . canaliculata. Duelos. Ann. Sci. N a t. 1 .1 . / 1 .
P u r p u r a t r o c h l e a .
This shell has generally four spira l ribs on the last whorls, the front one being the smallest. I have specimens
with the front and next and last, one with all the ribs wanting, when the shell is regularly spirally
P u r p u r a s a c e l l u m . (L am .2 A l? )
Murex sacellum. Chemn. x. / . 1561-62.— W. C. t. 25. f . 20.
P urpura Thiarella. Lam. 246. (fide ta b .)
Inhab. Pacific Ocean.
i .
MOLLUSCOUS A N IM A L S . 123
P u r p u r a L a n s t o r i u m .
Buco. Lanstorium Martyn, U. C. t.
Inhab. Pacific Oc ean.
Chemn. x . f . 1449-50.
P u r p u r a c a r i o s a .
Murex cariosus. Wood. Cat. Sup. t. 5 . / . 22.
Mouth orange, lip with three or four large teeth in front.
P u r p u r a s q u a m u l o s a .
Shell ovate, ra the r ventricose, pale brown, closely spirally ribbed, and with short, thin, concentric, scale-
like p lates. Spire short, convex. Mo u th large, inner lip a rch ed ; throat sm o o th ; outer lip crenulated.
Axis perforated. Axis I J inches.
In h ab . Pacific.
Very like Momceros imbricabtm, b u t has uo tooth, and the pilla r is more arched.
P u r p u r a c r i s p a t a .
Bucc. crispatum. Gmel. Chem. x i . / . 1803-8.
Murex crispatus. Lam. 174 Enc. i. 4 1 9 ./. 2.
Murex Lactuca et Murex ferrugineus. Esch. A tla s, t. 9 . / . 2, 3.
Purpura semiimbricata. Lam. 246. (fide ta b .)
In h ab . South Pacific.
See also
Murex lamellosus. Chem. x . p . 1 7 9 ./. a. b.
P u r p u r a c o s t u l a r i s .
Murex costularis. Lam.
Bucc. criuitum. Solander.
Mur. subglobosus. Wood. Sup. t. 5 . / . 1 .
Murexplicatus. Martini, iv ./ . 954.— Wood, Cat. t. 2 6 ./. 55.
Mur. Hippocastanum. Gmel.
Mar. Neritoideus. Gmel.
Fusus Neritoideus. Lam.
Pyrula abbreviata. Lam.
Pyr. Neritoidea. Lam.
Pyr. deformis. Lam. H is t.— Chem. x . / . 1377.—jE k c . t. 4 1 9 ./. 8 .
In h ab . Pacific Ocean.
Varies very much in shape, and has a white, red, and p u rp le throat. The young is often deformed
being found in the crevices o f rock and holes in corals, which sometimes d o not allow their increase beyond a
certain size. I am aware th a t many persons with isolated specimens will n o t allow them all to be varieties
o f one species, b u t I think the series I have bears me o u t in uniting them together.
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