890 



Cerith. testa pyramidal], parva, pallide fulva, acuta, longitudina- 

 liter plicata; anfractibus distinctis, spiraliter costatis, costa infe- 

 riore maxima ; apertura expansa ; canali subproducto, tortuoso. 



Small ; pale fawn, sharp, longitudinally ribbed, crossed by nar- 

 row ribs, the lowest of which on each whorl is large. The aper- 

 ture is expanded, and terminates in a slightly produced, tortuous 

 canal. Island of Burcas, Philippines, H. Cuming. 



2 c. Shaped like a Trochus, many-whoded ; columella twisted. 

 — Genus Telescopium, Schumacher. 



179. Cerithitjm telescopium (pi. clxxxv. f. 269), Zinnceus 

 (Trochus), T. Linn. Syst. Nat. Trochus, no. 600. Telescopium 

 fusca, Schm. 



Cerith. testa conica, fusco-nigricante, spiraliter planulatim sul- 

 cata; anfractibus angustatis, numerosis, ultimo basi planulato, 

 spiraliter costellato; apertura quadrilabra; columella alba, tor- 

 tuosa ; labio externo antice producto, denticulate, postice emar- 

 ginato ; operculo corneo, rotundato, multispirali, 



Tins well-known conical species is believed by anatomists to 

 have affinities with the IVochida, rather than with the genus now 

 before us. With these questions we have little to do at present, 

 but conchologically the shell appears very suitably placed near the 

 group to which C.ftiscalum and C. radula belong. Philippines, 

 //. C. Singapore, Malabar, etc., Auct. 



2 d. Fluviatile, many whorls; columella tortuous ; outer lip 

 produced in front ; shell generally covered by an epider- 

 mis. — Genus Tympanotomus, Klein. 



180. Cerithitjm fuscatum (pi. clxxxvi. f. 300, 301), Zin- 

 nceus (Murex fuscatus), Linn. Syst. Nat. ed. 12. p. 755. Ceri- 

 thium muricatum, Brag., Diet. no. 27. Strombus tympanorum 

 aculeatus, Chemn., Conch, v. 9. t. 136. f. 1267, 1268. C. mu- 

 ricatum, Sowerby. 



Cerith. testa elongata, epidermide fusca induta, tuberculis acu- 

 leatis magnis paululum adscendentibus cincta; anfractibus una 

 serie tuberculatis, ad suturam graniferis, ultimo subtiis biseriatim 

 moniliferis ; apertura curta, subquadrata, superne angulata ; labio 

 externo autice producto; columella breviusculo; canali emargi- 

 nato. 



This well-known aculeated shell, with a brown epidermis, fre- 

 quents the mouths of rivers in West Africa. 



