HELIX-SOLAROPSIS. 177 



Group XIV. SOLAROPSIS Beck, 1837. 



Solaropsis BECK, Index Molluscorum, p. 27 (1837). ALBERS, 

 Die Heliceen, p. 127 (1850) ; 2d ed., p. 164 (I860). MORCH, Cat. 

 Yoldi, p. 8. H. and A. Ad., Genera Rec. Moll, ii, p. 204. 

 PFETFFER-CLESSIN, Noment. Hel. Viv., p. 185 (1878). KOBELT, 

 111. Conchylienbuch, p. 252. FISCHER, Manuel de Conchyl., p. 470. 

 Helicella SWAINSON, Malacol., p. 333 (1840). Ophidermis 

 AGASSIZ, in Charp. Cat. Moll. Suiss. (1837), teste Hermannsen, in 

 Indicis Generum Malaco. Prim., ii, p. 153. Psadara MILLER, 

 Mnhik. Bliitter, xxv, p. 162 (1878). Ophiospila ANCEY, The Con- 

 chologists' Exchange, i, p. 64 (1887). 



The species of Solaropsis are mostly forest snails, living on the 

 ground under stones and in hollow trees. The species form a series 

 too closely related to admit of the division proposed by Miller, who 

 separated the smaller, thinner forms under the name of Psadara. H. 

 rosarium and other species form a connecting link between the de- 

 pressed forms like H. selenostoma, and those grouping around H. 

 pascaUa, feisthameli, etc. Ancey has made a subgenus Ophiospila 

 for H. kiihni, andicola, etc. This division is, of course, wholly 

 worthless. 



The following grouping shows the affinities of the species. 



I. SHELL LARGE, RATHER SOLID, PERIPHERY CARINATED OR SUB- 



ANGULAR. 



Group of H. serpens. 

 Granulate above ; apex plane, pellisserpentis, serpens, vipera, 



monolacca, pellisboce, anguicula. 



Not granulate ; apex sunken at tip, gibbonsi, prcestans. 

 Group of H. braziliana. 

 Granules in more or less distinct oblique rows, braziliana, 



heliaca. 



Granulation obscure ; peristome dark, pascalia. 

 Densely plicatulate-striate above, feisthameli, amazonica, nap- 

 ensis. 



II. SHELL SMALLER, THIN OR FRAGILE, SPIRE LOW OR PLANE. 

 Group of H. rosarium (connecting the following group with that 



of H. braziliana). rosarium, castelneaudi, kulini, incarum, cateni- 



fera, nubeculata, monile. 



Group of H. andicola, andicola, qvadrivittata, diplogonia. 

 Group of H. selenostoma, selenostoma, iris, rugifera, tiloriensis t 



hians, marmatensis. 

 12 



