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



lens it is seen that they are variegated with irregular radiating 

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

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

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

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



3. Patula dian^ (PfeifiFer). (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 preceding: species, which it very closely resembles. 



Hab. Diana's Peak. Living (P/r.). 



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



Testa minuta, late et aperte umbilicata, discoidalis, planorbi- 

 formis,pallide rufescens (?) ; avfractus 3^,perconvexi, sutura 

 profundissime discreti, suhceleriter accrescentes, lineis incre- 

 menti ohliquis striati, uUimus tuhiformis, rotundatus, antice 

 solutus et descendens ; apertura subcircularis, margine colu- 

 mellari leviter planato. 

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

 Eab. Side Path (Tvrton). 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 deep. 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 re;l towards 

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

 exhibited more or less of that tint. 



5. Patula LiETissiMA, sp. nov. (Plate XXI. figs. 4-4 b.) 



Testa minuta, anguste umbilicata, depresse subconoidea, alba, 

 maculis radiantibus rufis supra et infra picta ; anfractus 5|, 

 lente accrescentes, superne convexiusculi, sutura suhprofunda 

 sejuncti, lineis incrementi fortibus striati, ultimus ad peri- 

 pheriam rotundatus, antice haud descendens ; apertura semi- 

 lunata, edentula ; peristoma tenue, simplex, margine columel- 

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

 adaquans. 

 Diam. maj. 4 millim., min. 3|, alt. 2^. 

 Hub. Siigarloaf Ridge, near the top (Tartan). 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. 



