26 ARIONID&. 
Genus, MILAX—Pfeiffer. 
Back keeled to the shield; dorsal shield granulated or shagreened, 
truncated, with two small pores on its hinder edge; shell convex. 
M. antipodum, Pfeffer; Cat. Pul. Brit. Mus. 177. Ovate, 
attenuated, rugose (in ‘spirits), brown, back sharply keeled to the shield ; 
back with parallel g grooves diverging from the shield, with short straight 
branches passing across from one to the other; shield short, oblong, 
rounded behind, smooth, with netted grooves; breathing hole rather 
behind the middle of the right side; foot in three bands, the central 
band rather the broadest, with series of grooves on each side from a 
a zig-zag central groove, the side bands with close parallel straight cross 
grooves. (Pfr.) 
Wellington and Dunedin. 
M. emarginatus, Yution, Trans. N.Z. [nstitute,xi., p. 331. Mantle 
slightly shagreened, short and emarginate behind. Pulmonary opening 
a little behind the centre. A depressed line circling the mantle in front 
from the pulmonary opening. Colour dark grey or olive above; foot 
and lower sides of the body yellowish-white. Shell small, nearly flat. 
Radula with 27 rows of rachis teeth, and about 25 on each side of 
lateral teeth. Transverse rows curved. 
Dunedin. 
FAMILY—ARIONID&. 
Lingual teeth numerous, uniform, close together. Animal elongate ; 
body not distinct from the foot. Eye peduncles and tentacles retractile 
under the skin. Mantle shield-like on the fore part of the back ; 
pulmonary opening on the right side. Jaw horny, lunate. A mucous 
gland on the upper side of the extremity of the tail. 
Genus, ARION—Ferussac. 
Animal elongate. Tentacles and eye-peduncles moderate, Repro- 
ductive aperture immediately below the pulmonary opening. Shell 
rudimentary. 
A.incommodus, Hutton; Trans. N.Z. Lnst.,X1., ~. 331. Mantle ru- 
gose, short androunded ‘behind. Pulmonary openingin front of the middle. 
Back rounded, not pointed posteriorly. Dark lead grey; a lateral stripe 
on the mantle, and a longitudinal band on each side, black. Some- 
times the whole upper part of the body greyish black. Foot yellow. 
Radula with 21 rows of rachis teeth, and about 22 on each side of 
lateral teeth. Transverse rows slightly curved. 
Dunedin. 
FAMILY—JANELLID&. 
Body elongated, slug-like. Tentacles none. Mantle rudimentary 
or absent. Pulmonary opening on the right side, close to the centre of 
