Cheeseman. — On the Mollusca of Auckland Isthmus. 165 



Columbellidaei 

 37. ColumheUa choava, Eeeve. Under stones and on seaweeds 

 near low water-mark. A variety, nearly or altogether 

 black, is almost as common as the type. 



Sub-Order 8. Tcenioglossa. 

 Pomatiidae. 



88. Realia egea, Gray. Sheltering under decaying leaves of 

 Brachyglottis, etc, Mt. Wellington and Mt. Eden lava 

 streams ; gullies near St. John's College ; Kangitoto. 

 Fast becoming scarce. 



39. R. turriculata, Pfeiffer. With tho preceding, but much 



rarer. 



Cyclophoridse. 



40. Cydophorus cytora, Gray. On fronds of ferns, but appa- 



rently very rare. 



Rissoidae. 



41. Rissoina annulata, Hutton. On corallines and other sea- 



weeds in tide-pools. 



42. Rissoa rugulosa, Hutton. Under stones near low water- 



mark. Abundant. 



43. E. nana, Hutton. With the preceding, and also on sea- 



weeds. 



44. R. fiammulata, Hutton. Dead shells are not uncommon on 



the sandy beaches near Lake Takapuna. 



45. R. limbata, Hutton. On seaweeds. 



Hydrobiidae. 



46. Potanwpyrgiis cumingiana, Fischer. Lake Takapuna, One« 



huDga 8piings, etc. Abundant. 



47. P. corolla, Gould. With the preceding, but not quite so 



plentiful. 



48. P. antipoclum, Gray. Abundant in both fresh and brackish 



water. 



49. P. pnpoides, Hutton. Brackish water. Not uncommon, 



but easily overlooked. 



Littorindse. 



60. Littorina cincta, Quoy et Gaim. Very scarce near Auck* 

 land. Faces of tidal rocks on the coast near Lake Taka- 

 puna. 



51. L. mauritiana. Lam. Abundant everywhere on the faces 

 of rooks and chffs near high water-mark. 



