ELIOT : NUDIBKANCHS OF NEW ZEALAND. 343 



The labial cuticle shows a white granulation here and there, but no 

 armature. The radula consists of 36 rows, of which the three or 

 four in front are short and broken. The rest contain 50-60 hamate 

 teeth on either side of the naked rhachis. The innermost teeth are 

 smaller with long bases and low hooks. The hook of the first lateral 

 is often flat and irregularly-shaped, but no distinct denticulation was 

 seen. The teeth increase in size up to nearly the end of the row ; 

 the last 3-4 are lower, but not denticulate and not much degraded. 

 The salivary glands are rather short and thick, with thin ducts. 

 The oesophagus is thin and leads into an ample stomach, which has 

 thin walls and lies wholly outside the liver. This latter is covered by 

 the light-yellow hermaphrodite gland, which is thick and spread all 

 over it, above and below. The substance of the liver is rather darker 

 than the gland and is more diffuse than usual, containing many hollows. 



The spermatotheca is large and yellow, but broken. The spermato- 

 cyst could not be found, and was perhaps confused with the 

 fragments. There is a large prostate lying on the mucus gland. 

 The vas deferens consists of a couple of loose coils and bears many 

 prominences internally, but no. hooks or spines were found. 



There is no reason to doubt the correctness of the label which 

 describes this animal as Cheeseman's Boris luctuosa. It was caught 

 in the same place, and Cheeseman's statements about the external 

 characters and the radula are substantially applicable to the present 

 specimen. 



It has also all the characters of the genus Aphelodoris, and agrees 

 very closely with the type species A. mitillensis, except that the first 

 lateral has not a distinct denticle. But it has the chromodoridiform 

 shape, smooth back, raised rhinophore sheaths, grooved tentacles, 

 a prostate, and a radula as described for the genus. It might therefore 

 be called Aphelodoris luctuosa (Cheeseman). But Bergh has already 

 described (I.e.) under the name luctuosa an Aphelodoris horn Tasmania 

 which can hardly be the same species, since it is black and differs in 

 various details. It would seem that article 35 of the international 

 rules of nomenclature is applicable here. Although Cheeseman's 

 D. luctuosa dates from 1882, still, at the time when it is referred 

 to Aphelodoris, viz. 1907, there is already an Ajjhelodoris luctuosa 

 (1905) and Cheeseman's name must be rejected. The animal may be 

 renamed Aphelodoris Cheescmani. 



It is possible that this may be the animal described and figured by 

 Basedow & Hedley as Archidoris varia, which has a somewhat similar 

 coloration, a smooth back, grooved tentacles, elevated rhinophore 

 sheaths, and a similar radula (23 x 70 . . 70). The shape, however, 

 appears to be diff'erent. In any case A. varia seems to me to be an 

 !. Aphelodoris rather than an Archidoris, for it is one of the characters of 

 ^ the Archidorididae that the back is tuberculate, or at least granulate. 



Aphelodokis affinis, n.sp. 

 One specimen marked Great Barrier Island: 14mm. long, 8 broad, 

 8*5 high. It is shaped somewhat as Chromodoris : the sides are high 

 and the mantle-edge small. The colour is dirty white with irregular 



