OLIVID^E. / 



animal figured by D'Orbigny as Oliva auricularia the name of 

 Scaphura. 



These shells sometimes have an elevated shelly cross band. 

 Lamarck had a specimen of Oliva porphyria (Hist. viii. 418) 

 so marked. It is not uncommon in O. guttata, where it has 

 been regarded as a specific character ; but it is often found 

 in other species. 



A further study of the figures of the animals given by authors 

 has induced me to revise this arrangement and propose the 

 following 



Synopsis op the Genera. 



I. Head exposed ; tentacles elongate, subulate ; eyes distinct, sub- 



basal. Foot elongate, dilated, front lobes semicircular. 

 Operculum none. Shell with the front belt narrow. 



* Spire simple, with sutural groove open to the tip. 



Pillar lip simple, not covering the front belt ; inner lip cross 

 grooved. 1. Strephona. 



Pillar lip simple, not covering the front belt ; inner lip thick- 

 ened the whole length, with two or three slight grooves in 

 front. 2. Ispidula. 



Pillar lip simple, not covering the front belt ; inner lip with a 

 series of transverse parallel grooves in front extending over 

 the pillar. 3. Ramola. 



Pillar lip expanded so far back as to cover the front belt, and 

 with an oblique raised ridge in front ; inner lip grooved. 



4. Carmione. 



* * Spire callous, obliterating the suttiral grooves, except on the last 

 or lowest whorl. 



Shell ovate or obconic ; aperture wide ; pillar lip expanded ; 

 pillar twisted and grooved in front ; front belt broad. 



5. Claneophila. 



Shell subcylindrical ; spire small ; aperture linear ; pillar lip 

 simple, defined ; inner lip grooved ; front belt narrow. 



6. Galeola. 



II. Head scarcely exposed ; tentacles short ; eyes none. Foot elon- 



gate, dilated in front, one-coloured. Shell with the sutural 

 groove open. 



Shell subcylindrical or subovate ; aperture oblong, thickened ; 

 front belt broad, double. 7. Anazola, 



