DOLIUM, 



Species 9. (Mus. Brit.) 



DoLiuM PERDix. Dol. testd ovato-oblongd, tenui, itiflatd, 

 basin verms oilique effusd, timhilicatd, spird subexsertS, 

 anfruct'ilns sex, transversim sulcatk et costatis, costis 

 ad viyinti, contiguis, plano-convexis, vix elevatis, colu- 

 mdld arcuatd, labro simpUci; fulvo-bninned aid 

 rufescente-spadiced, macuUs Inmtis albk plus minusve 

 frequentibns, notatd, apertara; fauce cariilescente-albd, 

 ant brunnescente. 



The paetridge Tun. Shell ovately oblong, thin, in- 

 flated, obliquely effused towards the base, umbilicated, 

 spii-e somewhat exserted, whorls six in number, trans- 

 versely grooved and ribbed, ribs about twenty in 

 number, contiguous, flatly convex, scarcely raised, 

 columeDa arched, lip simple ; fulvous brown or light 

 reddish bay, marked, more or less plentiftdly, with 

 white lunate spots, interior of the aperture bluish- 

 white or brownish. 



Lamarck, Anim. sans vert. (Deshayes' edit.) vol. x. p. M'i. 

 Biicciiiiim perdix, Linnaeus. 

 Eadcra var. Bolium pUmiatum., Green. 

 Hab. Eastern, Western, and Pacific Oceans. 



It is not often that in genera so limited in kind as the 

 present, a species occurs ivith so wide a range of habita- 

 tion as the DoUitm perdlx. Inhabiting both hemispheres, 

 it differs in the ribs being more or less elevated, but in no 

 featm-e, sufficiently, to allow of its being made the subject 

 of another species, as introduced by Dr. Jacob Green in 

 the Transactions of the Albany Institute. 



The JD. perdix, it may be observed, is modelled on a 

 different type from the rest of the genus, the spu-e being 

 more elevated and the aperture more obliquely effused. 



Species 10. (Mus. Eolfe.) 



DoLiDM Chinense. Bol. lestd ovato-globoid, ie?missmd, 

 vetdricosd, basi subtruncatd, vix umbilicatd, anfractibus 

 sex, transversim vmlticostatis, costis temtibus depres- 

 siusculis, lird parvd interveniente, colmneUa contortd, 

 labro simplici ; albido fulvoque alteritatim zonatd, 

 zonis aliidis nifo-fusco maculatis, aperturce fauce pal- 

 lide anraiitio tinctd. 



The China Tun. Shell ovately globose, very thin, veu- 

 tricose, somewhat truncated at the base, scarcely 

 umbilicated, whorls six in number, transversely 

 many-ribbed, ribs rather depressed, with a small 

 ridge running between them, columella twisted, lip 

 simple ; painted alternately with fulvous and white 

 zones, white zones spotted with red-broivn, interior 

 of the aperture faintly tinged with orange. 



Deshayes, Anim. sans vert. vol. x. p. 146. 



Bticcinum Australe seu Chinense, Chemnitz. 

 Bolium variegatum, Philippi (not of Lamarck). 



Hah. China Seas. 



If Dr. Pliilippi had proclaimed the D. Chinense and 

 variegatum to be one and the same species in different 

 states, instead of assigning the shell under consideration 

 to the Lamarckian species, and distinguishing that from 

 Tones Straits by a new name, his opinion would have 

 been less open to objection ; for the characters of the New 

 Holland specimens are so truly represented in this, under 

 certain modifications, that they might almost be regarded 

 as local varieties. They agree even in colom- and pattern, 

 and the only difference between them consists in the 

 D. Chinense being of much smaller and lighter structiu-e, 

 of more contracted growth, and more numerously and 

 finely ribbed. 



Januai7, 1849. 



