436 PYBAMIDELLID^. 



united leaf; in its congener they are more triangular, less, 

 though greatly, membranous, do not unite above half their 

 length, and have very obtuse terminations. The C. pusilla 

 has a palish purple streak on each tentaculum and on each 

 side the rostrum; this fact is not without its value, as it 

 proves pretty clearly that the rostrum belongs to the neck 

 and tentacula, and not to the foot : in the C. elegantissima 

 both the same parts are hyaline-white. They both inhabit 

 the same littoral levels at Littleham Cove, Exmouth. 



The addendum to the preceding species will apply to this ; I 

 have only to observe, that the constant variations in the colour, 

 contour, and texture of the shells have been verified by the 

 examination of nearly twenty live individuals of this species. 



CH. CLAVULA, Loven ? 

 Eullmella clavula, Brit. Moll. iii. p. 314, pi. 98. f. 8 ; and iv. p. 283. 



The animal inhabits a pearly-white, but not glossy shell of 

 five rather rounded volutions, including the moderately re- 

 flexed apex. The body-whorl is about half the entire length of 

 the shell, with a narrowish, elongated, oval aperture, quite free 

 from angularity. The animal is clear frosted- white. Rostrum 

 very narrow, rounded at the end, not bilobed nor grooved, and 

 carried just before the foot ; neck greatly protruded, showing, 

 on the march, an open canal formed of two parallel longitudinal 

 lines. Mantle even : no fold visible. Tentacula short, broad, 

 swelling out behind like a minute wide leaf; the auriform 

 folding nearly disappears on the march ; they are not diver- 

 gent ; indeed, I may say, they are borne so close and straight 

 as almost to hide the rostrum and proboscidal fissure ; they 

 may be termed small, short, triangular, and terminate each 

 with two white inflations, that is, one completely apical, the 

 . other close below it quite lateral, subsemicircular, and as if 

 soldered to the external sides of the points. I do not recollect 

 having before observed this tentacular peculiarity. The eyes 

 are at the internal bases, not very close together. The foot is 

 a very deceptive organ, from its quality of exhibiting different 

 appearances ; it is very little concave in front, and has long 



