1863.] rev. h. b.tristram on guatemalan mollusks. 411 

 9. Supplemental Catalogue of Terrestrial and Fluvia- 



TILE MoLLUSKS COLLECTED IN GUATEMALA BY O. SaLVIN, 



Esq., M.A., F.Z.S. By the Rev. H. B. Tristram, Cork. 

 Mem. 



In a communication made to this Society on May 28, 1861, I re- 

 ported that Mr. Salvin's collection of Guatemalan shells, made during 

 his first visit, comprised forty-nine species, then enumerated. Mr. 

 Salvin has since kindly entrusted to my care the produce of his 

 second visit, which enables me to make considerable additions to the 

 former list. Of the forty-nine species already enumerated, and which 

 were chiefly collected in the immediate neighbourhood of Duenas, 

 thirty reappear in Mr. Salvin's later and much smaller collection, 

 formed chiefly in the district of Vera Paz and the Lake Peten. This 

 region has supplied all the novelties of the present catalogue. The 

 numbers are in continuation of the former paper. 



Former Species. 



4. Helix euryomphala, Pfr. Very large and fine specimens, 

 in the second collection from the mountain-forests of Vera Paz. 



11. SucciNEA (puTRis?) is S. sollcana, Pfr. 



14. AcHATiNA (species doubtful). Has been identified by 



Dr. PfeifFer as A. ti'ypano'ides, Pfr. 



Additional Species. 



50. Helix vitrinoides, nov. spec. 



T. peranguste umbilicata, depressa, apice subinfosso, pellucida, 

 aspera, tenuissinia, vix setosa ; spira plana, immersa ; an/rac- 

 tus 4^ / sutura profunda ; anfract. ultimus rotundatus, rapide 

 crescens, et dimidium testae occupans, antice descendens ; aper- 

 tura rotunda, expansa ; peristomium rectum, simplex. 



Diam. maj. 13 mill., min. 11 mill., alt. 7. 



Hab. Forests of Vera Paz. 



.51, Helix almonte, nov. spec. 



T. profunde umbilicata, depressa, semiglobosa, tenuis, cornea, de- 



licatissime striata ; spira paullulum elevata ; sutura profunda ; 



anfract. 5^, leviter accrescentes, turgidi ; apertura j)(irum oh- 



liqua, subcircularis ; peristomium rectum, margine columellari ad 



perforationem reflexiusculo. 

 Diam. maj. 1 1 mill., min. 9| mill., alt. 6 mill. 

 Hab. Vera Paz. 



52. Helix salvini, nov. spec. 



T. profunde umbilicata, conica, trochiformis, rufo-cornea, acute 

 carinata ; spira conica, vertice nitido ; sutura profimda ; an- 

 fract. 7, convexiuscidi, regulariter accrescentes, liris transversis 

 acutis et forte conspicuis nee continuis regulariter superne 



