202 Mr. E. A. Smith on the Land- and 
8. Helix (Geotrochus) louistadensis, Forbes. 
Helix lowuisiadensis, Forbes, Voy. ‘ Rattlesnake,’ vol. ii. p. 576, pl. ii. 
figs. 8a, 6; Reeve, Conch. Icon. fig. 1449. 
Hab. Sudest Island (MacGillivray). 
9. Helix (Geotrochus) millicente, Cox. 
Helix millicente, Cox, Proc. Zool. Soc. 1871, p. 323, pl. xxxiv. figs 
2a. 
Hab. Louisiade Islands (Cox). No special island men- 
tioned. 
10. Helix (Geotrochus) Thomson. 
(Pl. XIII. figs. 12, 13.) 
Testa imperforata, subconico-globosa, roseo-purpurea, pallido-luteo 
maculata et variegata, leviter nitida, incrementi lineis striisque 
obliquis minutis corrugatis confertis sculpta ; anfract. 44, convexi- 
usculi, celeriter crescentes, sutura simplici sejuncti, ultimus primo 
carinatus (carina antice obsoleta), prope aperturam subito de- 
flexus, pone labrum constrictus ; apertura obliqua, elongata, intus 
roseo-purpurea ; perist. albidum, expansum et reflexum, margine 
superiore antice sinuato, columellari lato, appresso, intus oblique 
rectilineari. 
Diam. maj. 27, min. 20, alt. 18 millim. 
Var. Testa subdiaphana, luteo maculata et variegata. 
Hab. St. Aignan. 
This species, H. lowisiadensis, and H. millicente are all 
closely allied, but exhibit 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. 1869, p. 47, 
pl. ii. fig. 6 ; Pfeiffer, Mon. Helic. vol. vii. p. 310. 
Hab. Louisiade Archipelago (Angas). No special island 
mentioned, 
12. Helix (Geotrochus) Boyert, Fischer and Bernardi. 
Helix Boyeri, Fisch. & Bern. Journ. de Conch, 1856, vol. v. p. 297, 
pl. ix. figs. 8,9; Pfeiffer, Mon. Helic. vol. iv. p. 201, vol. v. p. 270, 
vol. vii. p. 312. 
Hab. Admiralty Islands (7. & B.); Louisiade Islands 
(Angas, fide Pfeiffer). 
