220 Transactions. — Zoology. 



Whorls angled, -with six or seven distant spiral ribs ; varices very 

 numerous and close ; occasionally larger ones at regular intervals 

 (retiaria). 



A smaller and thicker shell than the last. The dentition and operculum 

 are figured in the Trans. N.Z. Institute, xv., pi. xiii., f. q. The operculum 

 is also figured by Quoy. 



Tkophon cheesemani, Hutton, New Zealand Journal of Science, 1882, 

 p. 69 ; Trans. N.Z. Institute, vol. xv., p. 131 (Purpura). 



Hab. Port Waikato. 



Whorls rounded, with five narrow spiral grooves, crossed by growth 

 lines ; right lip strongly toothed inside ; columella rounded. 



As the operculum and dentition of this species are unknown, it is 

 doubtful whether it should be placed here or in Polytropa. 

 Genus Kalydon, Hutton (1883). 



Shell purplish or yellowish brown, shortly fusiform, longitudinally 

 ribbed or undulated, and spirally striated. Operculum ovate, with the 

 nucleus subapical. Dentition as in Trophon. 



Differs from Trophon in wanting varices and from Urosalpinx in the 

 operculum. 



Kalydon duodectmus, Gray (Fusus) in Dieffenbach's New Zealand, ii., 

 p. 230 (1843). Fusus corticatus, Hutton, Cat. Marine Moll, of N.Z., p. 9 

 (1873). 



Hab. Auckland to Banks Peninsula. 



Shell with about twelve broad, rounded, rather close, longitudinal ribs ; 

 crossed on the body- whorl by about twelve narrow spiral ribs, of which the 

 anterior six are distant, the posterior five or six crowded. Canal moderate, 

 nearly straight. 



The operculum and dentition are figured in Trans. N.Z. Institute, xv., 

 pi. xiii., f. d. (paivce). 



This species appears to be allied to Fusus plumbeus, Gould, from Tierra 

 del Fuego. Trophon paivce, Crosse, belongs to the genus, but has only 

 eight or nine narrow longitudinal ribs, and the spiral ribs are closer. 



Dr. Gray's description is a compound of this species and Pisania vittata. 



Kalydon plebeius, Hutton, Cat. Marine Moll, of N.Z., p. 9 (1873). 



Hab. Auckland to Stewart Island. 



Shell with numerous narrow longitudinal ribs (sharp in the young) 

 crossed by ten to fifteen strong spiral ribs, giving rise to a latticed or sub- 

 nodulose appearance ; canal short, sharply bent. 



Dr. von Martens refers this to Fusus corrugatus, Eeeve, but our shell is 

 much smaller and differently marked, if Eeeve's figure is correct. 



The operculum and dentition are not known. 



