OF MOLLUSCA. 23 



Fam. V. TURRITIDiE. 



Head truncated. Tentacula moderate. Mantle enclosed. Siphon 

 produced, recurved. Foot simple. Operculum none. 



Shell fusiform ; spire conical ; pillar with large ohlique folds in 

 front ; canal distant, rather produced, bent up at the tip. 



1. TURRIS. 



Shell fusiform ; spire conical ; whorls compressed ; aperture 

 linear ; pillar lip obliquely folded ; outer lip striated within. 



1. T. corrugata, Quoy, t. 28. f . 2 ; t. 106. f. 7. 



2. T. caffra, t. 81 a. f. 3. 



3. T. stigmataria, t. 28. f . 8 ; t. 106. f. 3. 



4. T. paupercula, t. 128. f. 7. 



The penis of Turris caffra is elongate, bent up. The siphon mo- 

 derate, simple at the base. Proboscis not produced. Lingual mem- 

 brane elongate. Teeth 1*1*1; central transverse, rather angularly 

 produced in the centre, with nine teeth on the front edge, the lateral 

 largest; lateral teeth elongate, subulate, curved (semicircularly) . 



Fam. VI. CANCELLARLULE. 



Tentacles conical, subulate, close together at the base. Eyes ex- 

 ternal, basal. Proboscis ? Teeth ? Foot produced in 



front. Mantle enclosed. Siphon none? "not produced." (J)' Orb.) 



Shell ovate ; spire short ; whorls convex, striated or costated ; 

 mouth ovate, angular in front, with an indistinct siphonal notch ; 

 pillar lip with oblique plaits. Operculum ? 



1. Cancellaria. 

 Character of family. 



1. C. tuberculata, t. 89. f. 5. 



2. C. trigonostoma, t. 91. f. 5 (not good; perhaps altered from 



former). 



3. C. textilis, Adams, Gen. Moll. t. 29. f. 4. 



2. ?Admete. 



Foot large, longer than the shell, broad, truncated, sinuated in 

 front, lanceolate behind. Head small, rounded ; mouth simple, with- 

 out any proboscis or lingual membrane. Tentacles elongate, fili- 

 form. Eyes on minute tubercles on the outer side cf the base. 

 Operculum none. 



Shell ovate, diaphanous, brittle ; aperture ovate, scarcely nicked 

 in front ; pillar arched, obliquely truncated ; lip thin, acute. 



1. Admete crispa, t. 125. f. 1. 



