APPENDIX. 273 



Vol. iii. p. 220. Aclis supranitida. 



We cannot determine from the description, avowedly taken 

 from an immature specimen, to what the Turbonilla reticulata of 

 Macgillivray (Moll. Aherd. p. 327) should he referred. The 

 synonyms indicate Cerithium reticitlatum, but the characteristics 

 mentioned (rounded whorls, and an umbilicus) scarcely permit 

 this conclusion. An excellent conchologist who has examined 

 the specimen, declares it to be a young Aclis : but the expressions 

 " reddish brown," and " ridges crossed by transverse grooves," are 

 against this hypothesis. 



Aclis supranitida was taken alive by Mr. Hanley in Guernsey 

 this summer. It is entirely white, except the jet black eyes 

 which are placed far back, sessile and rather distant. It has no 

 true muzzle. The tentacles are subulate and truncated. The 

 tail is simple and obtuse. There are short lateral lobes. We 

 have figured the head of this animal in Plate MM. fig. 5. 



Vol. iii. p. 222. Aclis unica. 



Mr. Barlee has sent us a broken specimen, which agrees with 

 this species in most particulars ; the ribs, however, are rather 

 more elevated than usual, and the spiral lines almost entirely 

 obsolete. It may possibly prove, however, a distinct species. 



Vol. iii. p. 231. Eulima polita. 



The nitida here spoken of is that which was indicated but not 

 described by W. Thompson, in the Annals of Natural History, 

 New Series, Vol. iii. p. 352. 



Vol. iii. p. 239. On Chemnitzia, Odostomia, and Eulimella. 



It is requisite to notice the elaborate papers* by Mr. Clark, 

 on the Chemnitzia?, which are of high interest in a malacological 

 point of view. In his last paper (Sept., 1852) he has abandoned 

 many of his earlier and rasher assertions, so that his present 



* Ann. Nat. Hist., new ser. 1851, 1852. 

 VOL. IV. N N 



