126 CERTTHIUM. 



Var. nodulosa, Phil., var. provinciate (sp.). Locard, var. alucaster, 

 Brocchi (fig. 40), and var. plicata, Phil. (fig. 49), which is the same 

 form, var. subvulgatum (sp.), Locard, and its synonym, C. spinosa, 

 Blainv. (fig. 41), var. Bourguignati (sp.), Locard, and its synonyms, 

 C. tuberculata, Phil., C. alucaster, Scacchi, and C. intermedia and (X 

 minima, Weink., var. Servaini (sp.), Locard, var. mutica, Bucq. 

 Dautz. et Dollf. (fig. 42), var. angustissima, Weink. = C. stenodeum, 

 Locard, var. protractum, Bivona, and its synonym var. graeilis, 

 Phil. (fig. 43), vars. hirta, seminuda (fig. 45) and longissima (fig. 44) 

 of Bucq. Dautz. et Dollf, var. inseriptum, Monts, (for var. repanda. 



B. D. D., not Monts., fig. 46), var. repanda, Monts., vars. albino,,, 

 citrina and melania, Monts., var. minuta, de Serres, var. pulchella, 

 Phil. (fig. 47). 



C. RUPESTRE, Risso. PL 21 , figs. 48-50. 



Shell spirally engraved, with subnodulous oblique longitudinal 

 low riblets, stronger at the suture and fading out below ; greyish, 

 numerously spotted and striped with chestnut. Length, 1 in. 



Mediterranean Sea. 



Always smaller, smoother and less angulated than the preceding 

 species ; the painting has frequently a minutely tessellated appear- 

 ance. The synonyms are C. lividulum, Risso, C. fuscatum, Costa, 

 C. Mediterraneum, Desh., C. tuberculatum, Blainv., C. variegatum, 

 Menke, C. doliolum, Weink., C. verrucosum, Renieri. As in the 

 case of C. vulgatum, several species and varieties have been manu- 

 factured out of forms of this shell, such as var. strumaticum (sp.), 

 Locard = - C. tuberculatum, Blainv. = = var. plicata, B. D. D. (fig.. 

 49), var. Massiliense (sp.), Locard = var. minor, B. D. D. (fig. 50), 

 and var. attenuata, B. D. D. 



C. ADUSTUM, Kiener. PI. 21, figs. 51, 52. 



Whorls angulated and tuberculated above, with sometimes two or 

 three inferior rows of small tubercles on the body whorl, closely 

 spirally striate, the strise sometimes granose ; columella with a heavy 

 posterior callus ; whitish, obscurely clouded with grey, with more 

 or less interrupted chestnut or chocolate spiral lines and macula- 

 tions. Length, l'5-2'25 in. 



Gallapagos Is., Panama to Mazatlan. 



The synonyms are C. nebulosum, Sowb. (fig. 51), C. maculosum, 

 Kiener. In the typical C. adustum the tubercles are obsolete, so- 

 that the shell is nearly smooth. 



