202 Mr. E. A. Smith on the Land- and 



8. Helix [Geotrochus) louisiadensis, Forbes. 



Helix louisiciihnsis, Forbes, Voy. ' Rattlesnake,' vol. ii. p. 37G, pi. ii . 

 figs. 8 a, 6 ; Reeve, Oonch. Icon. fig. 1449. 



Hob. Suclest Island [MacGilUvray). 



9. Helix {Geotrochus) millicentm^ Cox. 



Helix millicentm, Cox, Proc. Zool. Soc. 1871, p. 323, pi. xxxiv. figs. 2- 

 2 a. 



Hob. Louisiade Islands {Cox). No special island men- 

 tioned. 



10. Helix {Geotrochus) Thomsoni. 

 (PI. XIII. figs. 12, 13.) 



Testa iraperforata, subconico-globosa, roseo-purpurea, pallido-luteo 

 maculata et variegata, leviter nitida, incrcmcnti lineis striisque 

 obliquis minutis corrugatis confortis sculpta ; anfract. 4^, convesi- 

 usculi, ccleritcr cresceutes, sutura simplici scjuncti, ullimus prime 

 cariuatus (carina antice obsoleta), prope aperturam siibito de- 

 flexus, pone labium constrictus ; apertura obliqna, clongata, iutus 

 roseo-purpurea ; perist, albidum, cxpansum et reflexum, margiue 

 superiore antice sinuato, columellari lato, apprcsso, iutus oblique 

 rectiliueari. 



Diam. maj. 27, min. 20, alt. 18 millim. 



Var. Testa subdiaphana, luteo maculata ct variegata. 



Hal). St. Aignan. 



This species, H. louisiadensis^ and //. millicentoi are all 

 closely allied, but exliibit certain differences which probably 

 will prove constant, being confined to specimens from parti- 

 cular islands. 



11. Helix {Geotrochus) Dampieri^ Angas. 



Helix {Geotrochus) Dampieri, Angas, Proc. Zool, Soc. 1809, p. 47, 

 pi. ii. fig. 6 ; Pfeiff'er, Mou. Helic. vol. vii. p. 310. 



Hah. Louisiade Archipelago {xingas). No special island 

 mentioned. 



12. Helix {Geotrochus) Boyeri^ Fischer and Bernardi. 



Helix Boyeri, Fisch. & Bern. Journ. de Oonch. 1856, vol. v. p. 297, 

 pi. ix. tigs. 8, 9 ; Pfeiflfer, Mon. Helic. vol. iv. p. 201, vol. v. p. 270, 

 vol. vii. p. 312. 



Hah. Admiralty Islands {F. tO B.) ; Louisiade Islands 

 {An gas ^ fide Pfeiffer). 



