TE]. ESCOPIUM 



Genus TELESCOPIUM, Scbumacher. 



Tesla roiiicn, f/irrUa ; anfractihns numerosis, ultimo aiiyii- 

 lato ; uptrturd brevi, in canalem hrevem desinente, co- 

 lumella lortiid, labro ivfra valde producto ; opercnlo 

 conu'o, rotunda, mullispirali . 



Shell conical, turreted; whorls numerous, the last angu- 

 lated ; aperture short, ending in a short canal, colu- 

 mella tortuous, outer lip much produced in front ; 

 operculum horny, rounded, mullispiral. 



The type of this genus is the T.fuscum, which, iu com- 

 mou with shells of the geneva Cerithidea, Polamides, etc., 

 have rounded, multispiral opercula ; and, instead of being 

 marine, like Ccritliiitiii proper and J'erttigua, are frequenters 

 of mouths of rivers and marshy grounds. The second 

 species, T. lave, has been associated with the first from the 

 very similar form of the shell, the operculum being \\\\- 

 known. Mr. Hanley, however, possesses a specimen with 

 an operculum, which, if authenticated as really belonging 

 to it, would restore the species to Centhimn proper, being 

 oval and pauci-spiral. 



Species 1. (Mus. Sowerby.) 



Telescopivm fuscum. Tel. testa conicd, lata, fusco- 

 niijricante, spiraliter profundi sulcata, inter sutcis 

 planulutini costatd ; anfraclibus uuinerosis, •ultimo an- 

 gulato, infra planulato, prope aperluram spiraliter bi- 

 costato, columella obliqui. tortuosd, rubra, canali late 

 emarginato, labro superne recedenle, eniarginato infra 

 valide producto. 



The bkown Tklescopium. Shell conical, wide, blackish- 

 brown, spirally deeply ribbed ; whorls numerous, the 



last angular, rtattened beneath, spirally bicostated 

 near the aperture, columella obliquely tortuous, red, 

 canal largely emarginated, outer lip receding, emar- 

 ginated, above, much produced below. 



SCHUMACHEK. 



Trochua telescopium, Linnaius. 

 Hab. East Indian Islands, near Calcutta, Borneo, etc. 



This well-known trochiform shell has a rounded, many- 

 whorled operculum. The animal inhabits swamps near 

 the mouths of rivers. 



Species 2. (Fig. n, b, Mus. Backhouse.) 



Telescopium l^ve. Tel. tedd alba, ventricosd, spiraliter 

 striata, pyramidali ; anfractibus nnmerosis, superne. 

 tuber culiferis, ultimo rotundatim angulato, infra an- 

 gitlum subinflato ; aperturd obliqud, canali valido, co- 

 luinelld tortud, labro arcuato, infra producto. 



The smooth Telescopium. Shell white, ventricose, 

 spirally striated, pyramidal ; whorls numerous, tuber- 

 culated above, the last roundly angulated, rather in- 

 flated beneath the angle ; aperture oblique, canal dis- 

 tinct, columella tortuous, outer lip arched, produced 

 beneath. 



QuoY, Voy. Astrolabe, pi. liv. f. 1-3. 



Hab. Australia. 



Although bearing a general resemblance to the fossil 

 Cerithium gigas, this species diflfers essentially from that 

 shell. It is observable that the whorls of the young shell 

 increase in size much less rapidly than the later ivhorls, and 

 the tubercles are more distinctly marked. 



March, 1865. 



