Mr. W. H. Benson on new species of Helix. 253 



any of its associates. H. inversicolor, when possessing only three 

 whorls, is double the diameter of H. Barclayi, is acutely carinated, 

 and distinguished by its dark colour. The young pupae are um- 

 bilicate, not perforate, are more conoidal, and are characterized 

 by the bold sculpture which obtains in all the IVIauritian species 

 of that genus. 



Having been the unwilling cause of the erasure of a nominal 

 species bearing the name of Barclayana, Pfr., from the catalogue 

 of Helices *, I have much pleasure in dedicating the present shell 

 to the old friend and successful conchological collector on whose 

 grounds I detected it, and who, occupied with the richer and 

 more obvious forms which the island presented to him, had not 

 then directed his attention to the minuter laud species. 



4, Helix 23 aliidicola, nobis, n. s. 



Testa perforata subgloboso-depressa, tenui, striatula, opaciter albida, 

 punctis translucentibus fasciisque strigisve purpureo-fuscis oruata ; 

 spira elevatiuscula, fusco-rubente, apice obtuse, fusco ; anfractibus 

 5-5i subarcte coiivolutis, convexis, ultimo iuflato, toto iuterdum, 

 fere versus aperturam duntaxat purpureo-fusco ; apertura rotun- 

 dato-lmiari, intus fusca, peristomate simplici, acuto, margine colu- 

 mellari dilatato, reflexo. 



Diam. major 5\ mill., minor 5 mill., axis 3\. 



Hah. iu palude prope Baszaarm's Kraal, inter Diep Rivier et Muy- 

 senberg Prom. Bon. Spei, in floribus Zantedeschite ^tbioplcse, et 

 ad margiuem paludis humidum, cum Succineae specie reptans. 



This little species, which is allied to, but very distinct from 

 H. Capensis, Pfr., and H. Uitenhagensis, Krauss, I found on the 

 1st of September 1846, in tolerable abundance on the border of 

 a marsh between the 12th and 13th milestones, on the road 

 from Cape Town to Simonstown. It was chiefly on the wet 

 ground bordering the marsh, the centre of which was then flaming 

 with broad tracts of a gorgeous scarlet-flowered Tritomanthe ; a 

 few specimens were in the throat of the corolla of Zantedeschia 

 ^thiopica, or Pig-lily of the colonists. Although this plant was 

 abundant in every ditch near the Cape at that season, the shell 

 appeared to be confined to the marsh in question. On the 24th 

 of October, v.hen I went to procure a larger supply, very few 

 specimens were to be found. 



5. Helix munda, nobis, n. s. 



Testa aperte et profunde umbilicata deprcssa, tenui, rugoso-plicatula, 

 trausluceute, nitidiuscula, cerea, vireuti-cornea ; spira vix elevata, 



* ' Ann. and Mag. Nat. Hist.' for September 1848. Pfeiffer has adopted 

 this view, ' Zeitschrift fur Malak.' 18-19, p. 71- " No. 305, H. Barclayana, 

 Pfr., ist ganz zu stieicheu, (hi es iiach Benson's Mittheilungen der Jngend- 

 ziistand von Pvpa Pac/ndu ist." 



