118 PYRAMIDELLID.E. 



puckered appearance to the upper part of each whorl ; the 

 colour is often yellowish in fresh specimens ; the whorls are 

 6 or 7, and flatter or more compressed than in 0. nivosa ; the 

 suture is channelled, and gives a turreted aspect to the spire ; 

 the mouth is longer in proportion to its breadth ; the outer lip 

 is emarginate or notched near its junction with the body-whorl; 

 the tooth is plait-like or twisted ; and the operculum is con- 

 spicuously striated. L. 0-175. B. 0*065. 



Habitat : Among trawl-refuse from Plymouth (Bar- 

 lee and Jordan), and Falmouth (Miss Vigurs, fide 

 Cocks) ; dredged in St. Mawe's Creek, near Falmouth 

 (Hockin) , and in 20 f. on the Turbot-bank, near Larne, 

 co. Antrim (J. G. J.). 



The proportion of length to breadth varies con- 

 siderably in the Plymouth specimens. Mr. Clark called 

 this a variety of the last species. But each has its own 

 characters, and I have not yet seen any connecting link ; 

 the difference of size also, considered with regard to the 

 habitat (see vol. iii. p. 27), would disincline me to unite 

 these species. The present species is in shape not un- 

 like the young of Truncatella truncatula. 



4. O. clavula*, Loven. 



Turbonilla clavula, Lov. Ind. Moll. Scand. p. 18. Eulimella clavula, 

 F. & H. iii. p. 314, pi. xcviii. f. 8. 



Body clear frosted-white : neck greatly protruded, showing 

 on the mouth a canal or groove bounded by two parallel lon- 

 gitudinal lines : snout very narrow, not grooved nor bilobed, 

 but rounded at the extremity [rounded, bilobed (Loven)], 

 carried just before the foot: tentacles extraordinarily short and 

 broad [mutually connected in front, and vibrating very actively 

 (Loven)J, swelling out behind like a minute leaf; they are not 

 divergent, but borne straight and close together ; each termi- 

 nates in two white inflations, viz. one quite apical, and the 

 other immediately below it, both being nearly semicircular and 

 as if soldered to the external sides of the points or tips : eyes 



* A twig ; more correctly clavulus, a small nail ? 



