118 Transactions.— Zoology. 
EXPLANATION OF PLATE XII. 
Fig. 1. Struthiolaria papulosa. Male. 
Fig. > h js »  Branchial cavity laid open. 
„ Female. Branchial and abdominal cavities laid open. 
All ichs Meo are taken from spirit specimens. 
a, foot ; b, operculum ; c, rostrum ; d, penis; e, vas-deferens; f, oviduct ; 
g, renal duct; h, mantle; i, branchia; k, columellar muscle; l, siphon; 
m, stomach; n, anus; o, heart. 
Fig. 4. Struthiolaria papulosa. Dentition magnified 160 times. 
Fig. 5. » Opereulum magnified two diameters. 
Fig. 6. » airal. Living animal, after Quoy. (Female.) 
Art. VI.— Notes on some Branchiate Gastropoda. 
By Professor F. W. Hurron. 
[Read before the Philosophical Institute of Canterbury, 3rd August, 1882.] 
Plates XIII.-XVI 
Apiysta rRYONI, Meinertzhagen. Pl. XIII., fig. a. 
Dentrtton, 13-1-1838. Teeth quadrate, with basal and reflected portions. 
Reflexed portion of central tooth trilobed, with a single cutting-point on 
the median and two small ones on each of the lateral lobes. Interior 
laterals three-lobed, the interior one the largest, each with a smooth 
cutting-point. Outer laterals one-lobed, with a toothed cutting-point. 
The three outer marginals reduced to plates. 
The teeth figured are from a dried specimen collected at Napier, and 
given me by Mr. Tryon. 
. CALLIOPÆA FELINA, Hutton. Pl. XIII., fig. s. 
Radula consists of about eleven blunt oval teeth placed in a single 
series, and getting gradually smaller. 
The specimen figured came from Lyttelton. 
Murex octoconus, Quoy and Gaimard. Pl. XIII., fig. c 
Dentition.—Ceniral tooth with five nearly equal and equidistant cusps, 
the anterior surface concave, and the sides rounded. Operculum ovate, the 
nucleus subapical. 
I am indebted to Mr. T. F. Cheeseman for specimens from Auckland. 
TropHon Parvæ, Crosse. Pl. XIII., fig. D. ; 
Animal white, speckled with dead white. Foot slightly expanded and 
rounded in front, obtusely pointed behind. Tentacles approximated, the 
eyes on their external sides about two-thirds up from the base; siphon 
short, barely protruding from the canal. Dentition.—Central tooth with 
five pointed cusps, the middle one the largest, and those on each side of it 
