330 PROCEKDINGS OF THE MALACOLOGICAL SOCIETY. 



which are either identical or very closely allied occur on the coasts of 

 California and New Zealand, e.g., Doridopsis citrina and D. fulva, 

 Rostanga muscula and R. pulchra. (3) There is a small element which 

 appears to be peculiar to New Zealand and the adjacent waters of 

 Australia, as far as our present records go. It is represented chiefly 

 by the remarkable genus Alloiodoris. Atagema also is not recorded 

 from elsewhere, but has less decided characters. On the other hand, 

 none of the remarkable Antarctic forms which have been recently 

 described, such as Bathydoris, Charcotia, NotcBolidia, Tritoniella, and 

 Trito7iio'psis, have yet been recorded from New Zealand. 



I have added to this paper a description of a fine species of 

 Arcliidoris from Australia which seems new. 



Stiliger felinus (Hutton). 

 CalUopcea felma, Hutton : Trans. New Zeal. Inst., vol. xv, p. 133, 1882. 



Eight specimens from Te Onepoto, South Island. They vary greatly 

 in colour, ranging from uniform dirty white to almost unbroken dark 

 brown of various shades. The foot, anal papilla, and at least in part 

 the rhinophores are white in all specimens. In a dark specimen, 

 which appears to have preserved the natural coloration, the dorsal 

 surface and the inner side of the larger anterior cerata are of a deep, 

 rich, purplish brown, almost black. The outer sides of the larger 

 cerata, the whole of the posterior cerata, and the sides of the body are 

 lighter brown. At the tip of each of the cerata is a lighter but not 

 very conspicuous spot. Conspicuous, however, and bright white are 

 the anal papilla and the tips and under-sides of the rhinophores. From 

 each rhinophorc a band runs downwards ; the two bands meet and 

 form a white border across the head. In the lighter specimens, either 

 from alcohol or from natural variation, the cerata and sides of the body 

 have become much lighter, while the back retains more or less dark 

 pigment. Two specimens are quite white. 



The largest specimens are about a centimetre long, 4"5 mm. broad, 

 and 3-3 mm. high. The largest cerata are about 3"5 high, with 

 a maximum breadth of nearly 2-5. They are set in from 6 to 10 

 transverse rows, consisting of from 2 to 3 cerata each, but the third 

 longitudinal line of cerata is not perfectly developed in any specimen. 

 The inner cerata are considerably larger than the outer, and in some 

 specimens one or two of them are markedly larger than the others. 

 In most specimens there is visible a large bare area down the centre of 

 the back. The pericardium is large and prominent. From it there 

 runs in all specimens a conspicuous, long bladder-like prolongation or 

 ridge, extending to nearly the end of the body. The rhinophores are 

 distinct, but not large ; entire, not pcrfoliated or grooved. The white 

 band whicli runs from them to the moutli appears in some specimens 

 to bo a ridge. They point outwards, right and left, and do not stand 

 vertically. The anal papilhx is dorsal, behind the pericardial promi- 

 nence, and slightly to the left of it. The genital opening is just 

 behind the rhinophores. The foot is fairly broad, white, truncated in 

 front, not grooved or notched, and not produced into tentacular 



