STKES : NON-MARINE MOLLUSCA OF NORFOLK & PHILLIP IS. 145 



18. Vertigo Norfolkensis, n.sp. PI. XIII, Fig. 13. 



Testa subperforata, pyramidato-ovata, flavida, subnitens, oblique 

 striata, apice obtusulo ; anfractus 5|, convexi, ultinms (cum peris- 

 toniate) | approx. altitudiuis testae sequans ; apertura ovata, 

 7-deutata, deutes 2 parietales, 2 columellares, 3 palatales (supreruus 

 minimus) ; peristoma album, incrassatulum, subrenexum, margine 

 exteriore angulum obtusum formante. Alt. 4, diam. max. 2*3 mm. 



Hah. — Norfolk Island, in tbe crevices of the bark of a Dracena 

 (coll. Brit. Mus.). 



An interesting little form, with tumid whorls ; six of the teeth 

 are about the same size, but the lower parietal and upper palatal 

 are very small. 



19. Omphalotropis Brenchleti, n.sp. PI. XIII, Fig. 18. 



Testa mediocriter umbilicata, ovata, solidula, flavido-cornea, obscure 

 longitudinaliter costulata, ad peripheriam carina obscura et lira 

 circa aream umbilicarem munita, apice acutulo ; anfractus 5-5|y 

 convexiusculi, ultimus ssepe lineis duabus rufis notatus ; apertura 

 elongato-ovata, peristomate incrassatulo, albido-navo. Alt. 55, diam. 

 max. 4 mm. 



Huh. — Norfolk Island (coll. Brenchley in Brit. Mus.). 



Belonging to the group of 0. nuvigutorum, but more inflated, 

 broader in proportion to its height, and with the sculpture less 

 marked, though similar in nature. 



20. Omphalotropis albocarlnata, Mousson. 



Omphalotropis alhocarinata, Mousson : Journ. de Conch., xxi, 1873, 

 p. 115, pi. vii, fig. 3. 



Huh. — Norfolk Island (Mousson) ; amongst dead leaves, one 

 specimen (coil. Brit. Mus.). 



This may prove to be a variety of 0. navigatorum, Pfr., in which 

 the sculpture has become obsolete. 



21. Omphalotropis cerea (Pfr.). 



Hydrocmna (Omphulotropis) cerea, Pfeiffer : Proc. Zool. Soc, 1857, 

 p. 112. 



Huh.— Norfolk Island (Pfeiffer, coll. Brit. Mus.). 



22. Omphalotkopis navigatorum (Pfr.). 

 Hydroccena navigatorum, Pfeiffer: Proc. Zool. Soc, 1857, p. 113. 



Huh. — Norfolk Island, amongst dead leaves and rotten wood (coll. 

 Brit. Mus.). 



