62 MISS J. DONALD ON" THE GENFS ACLISIIfA. [Feb. 1 898, 



specimen in Dr. Hunter- Selkirk's collection has the protoconch 

 entire ; it is figured in PI. IV, fig. 12, and consists of ten whorls in a 

 lenoth of 3| mm. The protoconch (PI. IV, figs. 12 a&h) is composed 

 of little more than one smooth revolution, coiled somewhat obliquely 

 and rather overhanging the highest whorl of the conch, but not 

 detached from it nor standing as erect as in some species ; its 

 junction with the conch is marked by a slight rib, but the surface 

 is too much worn to show where the ornamentation begins. 



The largest example is in Dr. Hunter-Selkirk's collection ; both 

 apex and base are broken, leaving only nine whorls, which measure 

 5 mm. in length. Besides these Dr. Hunter-Selkirk possesses two 

 other specimens, Mr. Bennie and Mr. Smith each two, and I one, 

 which was given to me by Dr. Young. The last-named shell is 

 imperfect, but six whorls are left, which measure 3| mm. I would 

 suggest the name striatissima for this variety. 



Resemhlances. — Both the type and variety somewhat resemble 

 A. elongata var. cingulata^ but the whorls are higher and less com- 

 pactly coiled, the ornamenting threads are finer, and the protoconch 

 is less elevated. It ma}^ be distinguished from A. tenuistriata by 

 having higher whorls, and by the fine threads continuing all over 

 the conch, instead of being coarser on the earlier whorls. 



Locality and Horizon. — Lower Limestone Series (<^^), at Law, 

 Dairy. 



ACLISINA ELEGANTULA, Sp. nOV. (PI. IV, figS. 13, 13 «, 6 & C.) 



Description. — Shell elongated, composed of about thirteen gradually- 

 increasing whorls. Apex blunt ; protoconch consisting of little 

 more than one smooth whorl, slightly raised from the highest whorl 

 of the conch. Whorls convex and rather ventricose, ornamented 

 by eight raised threads almost equally disposed, the two uppermost 

 finer and placed a little nearer together than the others ; one or 

 two additional threads on the body-whorl. Sutures deep. Aperture 

 subovoid. Inner lip reflected on the body-whorl. Columella 

 slightly thickened, nearly straight. Base convex, imperforate. 



Resemblances. — This species may be distinguished from A. elongata 

 by the whorls being higher in proportion to the width, less flattened 

 above and slightly ventricose, the sutures more oblique, the orna- 

 menting threads differently disposed, and the protoconch more 

 depressed. 



RemarJcs. — In the collections of Mr. Bennie and Mr. John Smith 

 there are numerous specimens. The collection of the latter contains 

 the largest (PL IV, fig. 13) ; this consists of twelve whorls, whose 

 length =10| mm., width=2| mm. The usual size appears to be 

 about half this. Five examples in Mr. Bennie's and one in 

 Mr. Smith's collection have the protoconch preserved; they are all 

 much worn, so that the junction with the conch is very indistinct, 

 and the point of commencement of the ornamentation is not seen. 

 Two specimens belonging to Mr. Bennie are remarkable for having 



