Mr. W. Clark on some of the Animals of the Chemnitzise. 203 



is opake frosted white, with a rather large patch of dull claret- 

 red on the neck. The mantle has the usual fold at the upper 

 angle of the aperture. The rostrum is short, cloven to the eyes, 

 with the segments arcuating as in C ohliqua. The tentacula 

 coalesce at their bases, and are very broad and short, which con- 

 dition may, in some measure, be owing to the margins not 

 being folded in the auriform fashion on the march ; they termi- 

 nate in very small white slightly inflated tips ; the eyes are close 

 together at the internal bases. The foot appeared short and 

 broad as the animal moved in slow march, but perhaps, if the 

 pace had been accelerated, it might have been somewhat ex- 

 tended ; in front it is gently concave with blunt auricles, close 

 under which it becomes a little constricted, and terminates in a 

 deep regular emargination carrying on a plain lobe a remarkably 

 thin, light, horn-coloured, narrow, subelongated, obliquely stri- 

 ated operculum. 



It inhabits six miles from shore at Exmouth, in a shelly bot- 

 tom of 14 fathoms water. It has not been examined before. 



Chemnitzia Warrenii, Brit. Moll. 

 Chemnitzia decorata, nonnull. 



Animal inhabiting a white subturreted shell of four compressed 

 volutions, with oblique sutures ; the basal part of the body whorl 

 being finely, superficially, and irregularly spirally striated. The 

 mantle is even with the shell, but has the power of relaxing 

 itself so as to produce a small conduit at the upper angle of the 

 aperture. The rostrum is short, cloven as far as the eyes, having 

 the segments curved to the right and left; the tentacula are 

 short, triangular, bevelled, not broad, attenuating to a fine point, 

 and armed with small white inflated tips; they are carried in 

 front of the head with an angular divergence of about 75°; the 

 eyes are close together at the internal united bases. The foot is 

 short, concave in front, slightly aurided, posteally terminating 

 obtusely with a light, horny, thin, obliquely striated operculum, 

 seated on a simple lobe that is scarce distinct from the upper 

 part of the foot near its junction with the body. 



Habitat as in the two preceding species. This animal is now 

 noticed for the first time. 



Chemnitzia interstincta, Mont, et auct. ; Annals, N. S. vi. 458. 



Animal inhabiting a closely plicated white shell of five and a 

 half flattish volutions, the body not being half the length of the 

 shell ; the apex is less reflexed than usual ; the aperture has 

 generally a visible tooth, and there are one or two rows of crenae 



