20 Remarks on Certain Species of 



" Hah. — In Honduras (Dyson). 



" Obs. — Spec. 6 vidi. Species nullo raodo cum H. Dorfeuilliana Lea 

 confundenda, qu£e, ultimo anfractu subtus devio umbilicum tantum spu- 

 rium et rimalem ostendente, revera solummodo perforata est. Differt 

 insuper H. Dorfeuilliana Lea, dente parietali magno, fere tetragono, 

 linguiformi, peristomatis margina jungendo. H. Dorfeuilliana Lea (ad 

 specimen unicum descripta) vix nisi H. Troostiana Lea varietas. H. 

 Dysoni H. fallaci et Hopetonensi proxirae affinis videtur." 



Sliuttleworth gives no measurements. 



In January, 1856, Mr. Sliuttleworth wrote to me, acknow- 

 ledging receipt of some shells sent to him for examination, and 

 which I had not then determined. 



As to one, agreeing with my figure 26 on PL ix., he said, 

 " this is II. Dorfeuilliana Lea, which I had never seen, but I 

 find Albers has it unnamed from Texas, and I was on the point 

 of describing it as a new species, so little does Lea's figure 

 agree." The shell referred to may be a variety of Lea's species, 

 to which certainly it is allied ; it is distinct, however, ivovafati- 

 giata^ Troostiana^ and HazaTdi. 



With respect to another shell, the same as my figure 25 a. 

 PI. ix., Sliuttleworth remarked, " this is, I suppose, the true 

 H. plicata Say, but not being able to compare Say's descrip- 

 tion, I am not sure, — it is at all events distinct from S. Dor- 

 feuilliana \iQSi^ fatigiata Say, and Troostiana Lea." 



I find on examination of Mr. Lea's original specimen of 

 Dorfeuilliana, that it entirely agrees with the form supposed 

 by Mr. Shuttleworth to be jpUcata Say. The magnified figure 

 of the aperture (PL ix. fig. 25 a.), taken from a specimen in 

 my cabinet, agrees nearly with Mr. Lea's figure (PL ix. 

 fig. 25). 



Pfeiffer refers in the Synonymy of his Dorfeuilliana to the 

 figures in Chemnitz and Reeve, of which I annex copies (PL 

 ix. fig. 31, 32), in order to show how widely they difi*er from 

 Lea's species, and inasmuch as Shuttleworth refers to the 



