C E R I T H I U M . 



Plate XIX. 



Species 132. (Mus. Cuming.) 



Cerithium trociiiforme. Cerith. testa minutd, fusco- 

 nigrescente, trochiformi, longitudhialiter pUcatd ; an- 

 fractibus paucis, subventricosis, plicis qiiadrititber- 

 cttlatis, anfractu ultimo sublus subplanulato, leviter 

 costato ; aperturd sublrigond, columella angudd, elon- 

 gatd, acuta. 



The top-shaped Cerithium. Shell miaute, blackish- 

 brown, trochiform, longitudinally plaited ; whorls few, 

 rather veutricose, plaits Ibur-tubercled, last whorl 

 rather flat beneath, lightly ribbed; aperture rather 

 trigonal, columella narrow, long, pointed. 



SOWERBY. 



Hab. California. 



In form this minute species resembles C. iota, but, 

 whereas in the latter the sculpture is most prominent in a 

 spiral direction, in the present species the vertical plaits 

 are the most distinct. 



Species 133. (Mus. Cuming.) 



Cerithium lima. Cerith. testa oblongo-eylindraced,fulvd, 

 loHgitudinaliter leviter plicatd, spiraliter liris nume- 

 rosis rubris, minute crenutatis, albo-punctatis cinctd ; 

 anfractibus numerosis, subventricosis, superne ad su- 

 turam acute creuulatis, suturd excavatd; aperturd 

 sube.vpansd, cannli brevissimo, aperto. 



The file Cerithium. Shell oblong-cylindrical, pale- 

 brown, longitudinally lightly plaited, spirally girt 

 with numerous red, minutely crenulated, white-spotted 

 lines ; whorls numerous, slightly ventricose, acutely 

 crenulated above at the suture, suture hollow ; aper- 

 tiu"e rather expanded, canal very short, open. 



Bruguiere, Enc. Meth. ; Lamarck, Auim. sans vert. 



Hab. Mediterranean. 



A well-known shell, distinguished from others of the 

 same form by the sharp crenulations on the upper edge of 

 the whorl. 



Species 134. (Mus. Cuming.) 



Cerithium reticulatum. Cerith. testd obhngo-cylhi- 

 draced,fulvd,plicis lungitudinalibus et costis spiralibus 



ad angula nodosis cancellatd ; anfractibus numerosis, 

 rectiusculis, suturd profunda ; aperturd subquadratd, 

 columella redd, brevi, canali brevissimo, aperto. 



The reticulated Cerithium. Shell oblong-cylindri- 

 cal, light-brown, canceUated with longitudinal plaits 

 and spiral ribs, with nodules at the angles ; whorls 

 numerous, rather straight, suture deep; aperture 

 rather square, columella straight, short, canal very 

 short, open. ' 



Costa. 



Hab. British Coasts and Mediterranean. 



Species 133. (Mus. Cuming.) 



Cerithium granaeium. Cerith. testd oblongo-cylindraced, 

 solidd,fulvo-rufescente, leviter longitudhialiter plicatd, 

 spiraliter costis rubris moniliformibus distantibus cinc- 

 td; anfractibus brevibus, rectis ; aperturd ovatd, ca- 

 nali brevi, aperto. 



The granary Cerithium. Shell oblong-cylindrical, 

 solid, reddish-brown, lightly plaited, longitudinally 

 spirally girt with distant, beaded, red ribs ; whorls 

 short, straight ; aperture oval ; canal short, open. 



Kiener, Coq. viv. pi. xix. f. 3. 



Hab. Swan Kiver. 



The whorls are straight, and not crenulated at the 

 edsies as in C. lima. 



Species 136. (Fig. a, b, JIus. Cuming.) 



Cerithium zebrum. Cerith. testd oblongd, alba seu 

 fuhd,fusco-rubescente bifasciatd, minute seriatim gra- 

 nulatd ; anfractibus subventricosis ; aperturd ovatd, co- 

 lumella crassd, brevi, subtortuosd, canali brevi, aperto. 



The zebra Cerithium. Shell oblong, white or fulvous, 

 with brown-reddish bands, minutely and regularly 

 granulated ; whorls rather ventricose, aperture ovate, 

 columella thick, short, somewhat twisted, canal short, 

 open. 



KlE.\EK, Sp. Coq. viv. 



Hab. Gallapagos Islands. 



A pretty little dark shell, with dark spiral bands. 



December, 1865. 



