219 

 Serpula — continued. 



costalis. . angulated, loosely contorted, base subspirated, smooth, 



longitudinal. 

 dentifera. . round, contorted, with two or three dentiferous 



longitudinal folds. . Italy. 



Balanus. 



sulcatus. . conical, obtuse long grooves ; radiating transverse 



striae. 

 tintinnabulum. . conical, subventricose ; longitudinally lineated, 



transverse striated rays ; rostrated backwards. . Italy. 

 cylindraceus. . narrow base, elongated, subventricose. . Turin. 

 miser. . gregarious, short, valves straight, back in the lower 



part with two or three grooves ; opening dilated ; valves 



of operculum pointed, . Italy. 

 pustularis. . short, subconical ; valves smooth, six rays, two 



solitary, the rest in pairs. . Piedmont. 

 crispatus. . conical ; five distinct rays ; valves naked at the 



apex, muricated at their base. . Italy. 



Clavagella. 



echinata. . ventricose, echinated all over ; on one side with 

 tubular spines. . Grignon. 

 Fistidana ecMwo^a. Ann. duMus. Tom.vii. p. 429, Pl.xii. fig. 43. 

 cristata. . a crest of tubular spines on one side, . Grignon. 

 tibialis. . naked, compressed ; valve discoverable. . Grignon. 

 Brocchii. . pyriform, set with short tubes. . Italy. 



Fistulana. 



ampullaria. . sheath ampuUaceous, produced, opening bicari- 



nated. . Grignon. 

 pyrum. . sheath pyriform, plain. . Italy. 



Teredina. 



personata. . straight, sinous and lobules like a mask. . Courtagnon 

 baccillum. . solid, straight, and round. . Italy. 



Solen. 



vagina. . linear, straight ; one tooth. . Grignon. 



coarctacus . . oblong, transversely striated, contracted in the 



middle. 

 fragilis. . analogue of solen cidtellus ? 

 effusus. . ovato-oblong, straight, smooth, subangulated forward. 



Somewhat resembling solen vespertinus. 

 strigilatus. . ovato-oblong, with oblique imbricating striae. 

 appendiculatus. . elliptical, smooth ; an appendicular part at the 



base. . small. 



Glycimeris. 



margaritacea. . ovate, truncated forwards. . Grignon. 



