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., pl. xiii., f. q. The operculum 
is also figured by Quoy. 
TropHon 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. 
ers from Trophon in wanting varices and from Urosalpinx in the 
operculum. 
KaLyDoN pvopecimus, Gray (Fusus) in Dieffenbach’s New Zealand, ii., 
p. 230 (1848). Fusus corticatus, Hutton, Cat. Marine Moll. of N.Z., p. 9 
(1878). 
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., 
pl. xiii., f. n. (pawe): 
This species appears to be allied to Fusus plumbeus, Gould, from Tierra 
del Fuego. Trophon paive, 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 (1878). 
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, Reeve, but our shell i is 
much smaller and differently marked, if Reeve’s figure is correct. 
The operculum and dentition are not known. 
