98 TETHYS—AUSTRALASIAN. 
Aplysia brunnea Hurr., Trans. N. Z. Inst., vii, p. 279, pl. 21, fig. 
(1875) ; Man. N. Z. Moll., p. 123. 
T. venosa Hutton. PI. 59, fig. 39. 
Animal yellowish-brown, veined with dark brown, about 6 inches 
in length. Shell membranous; the apex rather coarsely concen- 
trically striated, the rest of the shell smooth and polished ; epi- 
dermis pale straw color. Length 1:25, breadth 1 inch. (Hutton). 
Wellington, New Zealand. 
Aplysia venosa Hurt., Trans. N. Z. Inst., vii, p. 279, pl. 21, fig. 
(1875). 
T. rryonit Meinertzhagen. 
Animal a dark brown (kelp color), spotted all over with gray 
pepper colored spots. The edges of the lower lobe of the mantle 
marked evenly with alternate darker brown and gray. The lobe 
covering the shell striped with gray, all of which stripes point to, 
and narrow towards, the apex of theshell. Posterior sides of upper 
tentacles also a peppery gray color. Shell faintly but finely striated 
concentrically, horny and flexible at the edges. 
Length of shell 1°15 inches, breadth 0°65 in. Length of animal 
about 5 inches. 
The above animal appears to me to differ in coloring from A. 
brunnea, described by Capt. F. W. Hutton. The shell also appears 
to me to differ in its measurements from those given by Capt. Hut- 
ton, and in appearance from that figured in his plate, being much 
longer in comparison with its breadth. The coarse striations and 
shape of the shell of A. venosa leave no doubt that my specimens 
differ from that animal. 
All my specimens discharged the purple fluid (which is character- 
istic of the genus) on being placed in fresh water, or otherwise an- 
noyed. I noticed also that the lower lobes, which some authors say 
are used in swimming by this genus, are only used in that way by 
this species in a very qualified sense. They attach themselves to a 
rock or to sea-weed by their tails, and allow their bodies to drift 
about, simply guiding the direction of their bodies, and maintaining 
their upright position, by the movement of the lobes. 
Asin Parmophorus, Bulla and Haliotus, the shells of younger 
individuals were much larger in relation to their bodies than those 
of mature age. (Meitnert.) 
Waimarama, Hawke’s Bay, and Napier, New Zealand. 
