274 Transactions. — Zoology. 



Fam. Helicidae. 



40. Vitrinoidea dimidiata, Pf. Under rotten logs; prefers 

 the outskirts of the bush. The animal is almost always found 

 with its tail brought forward to the right side of the head. I 

 am inclined to consider this peculiar form which the animal 

 assumes as mimicry, imitating certain not uncommon out- 

 growths on logs. 



41. Phrixgnathus maria, Gray. On rotten wood, &c. 

 Scarce. 



42. Phrixgnathus conella, Pf. On rotten wood, &c. Scarce, 

 especially alive. 



43. Phrixgnathus rcgularis, Pf. On rotten wood, &c. 

 Very rare. 



44. Phrixgnathus cclia, Hxitt. On rotten wood, &c. Scarce. 

 Near Mauriceville only. 



45. Laoma marina, Hutt. {= L. 7ier is sa, Hutt.). Amongst 

 dead leaves, on bark, &c. Not uncommon. 



46. Maoriana pseudoleioda, Sut. Not common. Under 

 rotten wood. 



47. Maoriana luairarapa, Sut. Not common. Under rot- 

 ten wood. 



48. Maoriana hectori, Sut. Under loose bark, together 

 with P. coma, P. hianca, and P. buccinella. 



49. Maoriana microundulata, Sut.- The rarest of the group. 



Fam. Pupidae. 



50. Pupa (Isthmia) neozelanica, Pf. Eather common 

 throughout the bush, though adult specimens are seldom met 

 with. Under bark and pieces of wood. 



(&.) Elasmognatha. 

 Fam. Janellidse. 



51. Janclla hitentaculata, Q. and G. Found everywhere, 

 especially under rotten logs. 



52. Janella hitentaculata, Q. and G., var. papillata, Hutt. 

 Eather scarce. 



Ord. PROSOBRANCHIATA. Sub-Ord. PECTINI- 



BRANCHIATA. 



Group BASOMMATOPHOEA. 



Sec. T^NIOGLOSSA. 



Fam. Hydrobiidae. 



53. Potamopyrgiis antipodum, Gray. Common in creeks. 



54. Potatnopyrgus cumingiana, Fischer. In the large creek 

 near Hastwell, on stones. The adult specimens deprived of 

 spines. Large specimens are found in the Euamahanga Eiver, 

 near Mauriceville. 



