200 EULIMID^. 



certainly be desirable to have a uniform mode of spell- 

 ing. Some purists contend that the specific name given 

 by the discoverer, if subsequently adopted as generic, 

 ought to be also retained ; so that our shell would be 

 Stilifer stilifer. Examples of such a reduplication of 

 the name under similar circumstances occur in Volva 

 volva and Turricula turricula. But it would be very in- 

 convenient to substitute the generic name for that of 

 Turtoni, which is so familiar to all conchologists, — to say 

 nothing of the inelegance of this method of nomencla- 

 ture, or of its being contrary to one of the rules recom- 

 mended by a committee of the British Association. 

 Dr. Johnston called this species Stylifer globosus, and 

 Brown Sty lifer astericola : the latter confounded it with 

 the tropical species of that name. 



Family XIX. EULI'MID^, H. & A. Adams. 



This, too, is a case where the description of the typical 

 genus will suffice. I do not know any other ; Leios- 

 tracttj H. & A. Adams (not Leiostracus, Albers), which 

 has Eulima bilineata for its sole representative, is un- 

 distinguishable from Euliina. 



Genus EULI'MA^ Bisso. PI. III. f. 3. 



Body spiral and smooth : mantle having a rudimentary bran- 

 chial fold : snout forming a bilobed flap or mentum : proboscis 

 long, cylindrical, and retractile ; it consists of an outer and 

 inner tube : tentacles awl-shaped, approximating at their bases : 

 eyes almost sessile, placed at the external bases of the tentacles, 

 or nearly behind them on the neck : foot lanceolate, double- 

 edged, as well as truncated and usually bilobed in front : gills 

 supposed to consist of a single plume. No tongue. Male organ 

 small, flat, and curved like a sickle. 



* A compound of a Greek and a Latin word, signifying finely polished. 



