218 TURBO. 



tuberculis spiniformibus erectis biseriatim armatus ; basis 

 convexiuscula, dense squamato-lirata ; apertura parva ; peri- 

 stoma biangulata ; columella elfusa. — The shell has been 

 inadvertently figured with an operculum (probably of T. 

 cidaris) which evidently does not belong to it. It was so 

 placed in the British Museum from the Cumingian collection, 

 hence the error. — Hab. Philippines (Cuming). 



99. ACULEATUS, pi. X. f. 122, and xiii. 136, Gmelin 

 (Trochus), Syst. Nat. ed. xiii. p. 3600, no. 48 — heliciaus, 

 Gmelin — calcar, Linn. — asperatus, Lamarck — stella, La- 

 marck — Spenglerianus, Chemnitz ? — Testa subgloboso conoi- 

 dea, solidula, plus minusve depressa, imperforata, luteola ; 

 anfractus circ. 7, plerumque convexiusculi, interdum concavi, 

 oblique rugoso corrugati, ad marginem squamis plus minusve 

 ramosis radiati ; basis convexa, costis 2 conspicuis muricato- 

 squamosis versus marginem cincta, deinde minute muricato 

 lirata ; apertura plerumque aureo tincta. Operculum ovale, 

 extus virescens, medio convexum, ad peripheriam attenuatum. 

 — A very variable species, with spined margin, spines some- 

 times sharp, sometimes ramose. The shell is sometimes 

 tumidly elevated, sometimes depressed ; the mouth is generally 

 tinged with yellow. 



Subsection Pachypoma. 



100. C^LATUS, pi. ix. f. 99, Chemnitz (Trochus), Conch. 

 Cab. vol. V. p. 33, pi. clxii. — Testa obeso-conica, infra con- 

 vexa, imperforata, flavescente lactea, hie illic viridi varie- 

 gata ; spira tumida, sutura impressa ; anfractus circiter 7, 

 superne leviter concavi, oblique imbricato plicati, inferne 

 obtuse angulati, muricato-squamati ; basis valide imbricato- 

 costata ; apertura rotunde ovata, obliqua. Operculum ovale, 

 extus albidum, valde convexum, granosum. — A fine species, 

 approaching rather more nearly to the typical form of Turbo 

 than others of the group, the margin being not so pronounced 

 and angular, and the base more convex. — Hab. West Indies. 



101. AMERICANUS, pi. ix. f. 98, Gmelin, Syst. Nat. 3581 ; 

 Chemnitz, Conch. Cab. vol. v. p. 33, pi. clxii. — plicato- 

 nodosus, Chemnitz. — Testa subpyramidali-conica, infra leviter 

 planata, imperforata, albida ; anfractus circiter 8, declives, 

 leviter concavi, longitudinaliter corrugate -lirati, ad marginem 



