1892.] LAND-SHELLS OF ST, HELENA. 261 



lens it is seen that tliey are variegated with irregular radiating 

 blotches of red and white intermingled. The lines of growth are 

 distinct, finely hRir-like, arcnate and oblique on the upper surface, 

 and gently undulating on the body-whorl. The umbilicus is deep 

 but narrow, equalling about one fifth the diameter of the base. 



3. Patula dian^ (PfeifFer). (Plate XXI. figs. 2-2 b.) 



This species does not belong to the group Hyalina (= Vitrea), as 

 supposed by Wollaston, but falls naturally into Patula together 

 with the precedina; species, which it very closely resembles. 



Hab. Diana's Peak. Living (Pfr.). 



4. Patula persoluta, sp. nov, (Plate XXI. figs. 3-3 b.) 



Testa minuta, late et aperte umhilicafa, discoictalis, planorbi- 

 formis,pallide rufescens (?) ; anfractus S^,perconveo!i, sutura 

 profundissime discreti, suhceleriter accrescentes, lineis incre- 

 menti obliquis striati, ultimus tubiformis, roiundatus, antics 

 solutus et descendens ; apertura subcircularis, margine colu- 

 mellari leviter planato. 

 Diam. maj. 3| millim., min. 2|, alt. 2. 

 Hab. Side Path (Turton). Extinct. 



This is a very remarkable little species, at once recognizable by its 

 Planorbiform appearance, and the detached anterior portion of the 

 body-whorl. The upper whorls do not rise above the last, and the 

 suture is remarkably deeo. The umbilicus is very wide and open, 

 permitting the convolution of the whorls to be observed to the apex. 

 Both of the specimens examined exhibited traces of red towards 

 the apex, and there is every probability of the living shell having 

 exhibited more or less of that tint. 



5. Patula l^etissima, sp. nov. (Plate XXI. figs. 4-4 b.) 



Testa mimita, anguste umbilicata, depresse subconoidea, alba, 

 maculis radiantibiis rujls supra et infra picta ; anfractus Si, 

 lente accrescentes, superne convexiuscuU, sutura suhprqfunda 

 sejuncti, lineis incremeMti fortibus striati, ultimus ad peri- 

 pjieriam rotundatus, antice haud descendens ; apertura semi- 

 lunata, edentula ; peristoma tenue, simp/ex, marqine columel- 

 lari dilatato ; umbilicus profundus, angustus, diam. totius \ 

 adcequans. 

 Diaon. maj. A millim.^ min. 3|, alt. 2^. 

 Hah. Sngarloaf Ridge, near the top {Turton). Extinct. 

 This little species is remarkable for its small deep umbilicus, 

 the toothless aperture, rather well-marked lines of growth, the 

 rounded periphery to the body-whorl, and the red colour-markings. 

 These consist of radiating blotches on the upper surface of the 

 whorls, which become rather angular and wavy on the middle and 

 lower part of the body-whorl. 



