522 Land and Freshwater Shells from Rotuma Island. 



S. veniista, Gould, from the Hawaiian Islands. Like many 

 other so-called species of this genus, the present one offers 

 very slight distinguishing features from several others. 



Family Helicinidse. 



8. Ilelici'na modesta^ Pfeiffer. 



Helicina modesta, Pfr. Proc. Zool. Soc. 1853, p. 52 ; Mon. Pneumon. 

 vol. ii. p. 186; Sowerbv, Thes. Cojioli. vol. iii. pi. cclxxi. figs. 221, 

 222 ; id. Conch. Icon. vol. xix. pi. xxix. figs. 259 a, b. 



Hah. Solomon Ishmds and New Hebrides. 



9. Helicina falgora^ Gould. 



Helicina fulgora, Gould, U.S. Explor. Exped. vol. xii. p. 97, Atlas, 

 figs. 10 i, c ; Pfeiffer, Mon. Pneumon. vol. i. p. 401. 



Hah. Samoa, New Hebrides, Tonga Island, Namuka ; 

 Kotuma {Gardiner). 



H. articnlata, Pfr., H. zehriolata^ Pfr., and //. Brenchleyi^ 

 Baird, appear to be .synonyms of this species. 



Family Cyclostomatidae. 

 10 Omphalotropis rotumana. 



Testa ovata, superne acuminata, anguste umbilicata, rufescens vel 

 fuscescens, albo irregulariter pieta et strigata, interdum ad peri- 

 pheriam albo vel rufo cincta ; spira elongata, conoidea, ad apiceni 

 mediocriter acuminata ; anfractus sex, lente accrescentes, cou- 

 vexiusciili, sutura subprofunda sejuncti, lineis increraenti striati, 

 ultimus ad peripheriam tenuissime carinatus et circa nmbilicum 

 carina altera crassiuscula instructus ; apertura piriformis, iutus 

 rufescens vel fuscescens, longit. totius | baud ajquans ; peristoma 

 intus leviter incrassatum, continuum, marginibus columellari et 

 basali leviter expausis. 



Longit. 6| millim., diam. 4 ; apertura 3 longa, 2g lata. 



Larger than 0. solidula, Pfeiffer, from Lord Howe's Island, 

 with more varied colour-markings, a wider umbilicus, and a 

 stronger keel ; also larger than 0. vitierisis, Liardet, from 

 Fiji, broader in form and narrower in the umbilicus. 



Family Auriculidse. 

 11. Pythia scarabceus, Linn. 

 Eather a small form. 



12. Melompus luteus, Quoy and Gaimard. 



