OF MOLLTJSCA. 41 



whorl very large ; mouth large, ovate ; canal suddenly recurved ; 

 outer lip more or less thickened, waved internally ; pillar lip rather 

 twisted, veined (figs. 22, 23). 



Kg. 22. — Dolium perdue, with proboscis exserted and siphon recurved. 



1. D. galea, t. 16. f. 1, t. 93. f. 1. 



2. D. olearium, t. 17. f. 1 ; Adams, Gen. Moll. t. 20. f. 6. 



3. D. perdix, t. 15. f. 1. Teeth (fig. 23). 



Fig. 23. — Teeth of Dolium perdix. 



2. Malea. 



Shell subglohose like Dolium, but outer lip thickened, toothed in- 

 ternally ; pillar-lip thickened, with two or three very large ridges. 



1. M. Pomum,t. 17.f. 2. Teeth 1,Adams,Gen.Moll.t.2Q.i.7. 



The Malea live under and between stones at extreme low water 

 mark.— C. B. Adams, 298. 



3. RlNGICULA. 



Shell ventricose ; spire short ; mouth contracted, with a notch in 

 front; pillar-b'p thickened, strongly plaited; outer lip thickened, 

 reflexed. Eyes on the outer side of the base of the subulate tentacles. 

 Operculum none ? — Adams. Teeth ? 



1. R. buccinea. 



