330 Transactions.—Zoology. 
APPENDIX. 
The following additional species are said to occur in New Zealand:— 
Balanus trigonus, Darwin, l.c., p. 223. 
Coronula balenaris, Gml. L. balenaris, Gray, in Dieffenbach’s New Zealand, 
II., p. 269. 
Tubicinella trachealis, Shaw. Gray, in Dieffenbach's New Zealand, II., p. 269. 
Anatifa elongata, Quoy and Gaimard, Voy. Astrol. IIL., p. 635, pl. 93, f. 6. 
Darwin, l.c., p. 374. 
Bay of Islands. 
Anatifa tubulosa, Quoy and Gaimard, l.c., III., p. 643, pl. 98, f. 5. Alepas 
tubulosa, Darwin, l.c., p. 169 
Tolaga Bay, attached to a living Palinurus. 
Dollicipes sertus, Darwin, l.c., p. 327. 
Art XXXV.—On a new Infusorian parasitic on Patella argentea. 
By Prof. F. W. Hurron. 
[Read before the Otago Institute, 8th October, 1878.) 
Lasr month, while investigating the structure of Patella argentea, Quoy and 
Gaimard, I discovered numerous specimens of an infusorian attached to the 
branchiz, of which the following is a description :— 
Body campanulate, naked, devoid of cilia, hyaline, highly contractile ; 
sessile or subsessile; mouth surrounded by a spiral ring of rather coarse 
cilia, which are Sp of being moved or held motionless at the will of the 
animal. Length, zl, inch. These little animals were attached to all parts 
of the branchie, and closed up suddenly, in the manner of Vorticella, when 
touched by any foreign body. 
The absence of a carapace and of a stalk would appear to put this 
species into Trichoda, Ehr., but the disposition of the ciliaround the mouth 
precludes this; and I am inclined to regard it as a Cothurnia, in which the 
lorica has become obsolete owing to its commensual habits. I therefore 
propose to call it Cothurnia patella. 
