346 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



The liver is large and greyish ; there is no stomach outside it. 



There can, I think, belittle doubt that Eergh's Chr. figiirata (1905) 

 is the same as the earlier Chr. amcena (1885) of Cheeseman. The 

 agreement in colour and external features is as complete as can be 

 expected in two descriptions made, one from living and the other from 

 preserved specimens. Cheeseman's account of the radula, though 

 slight, is not inconsistent with the identification, though he describes 

 it as smaller (65 x 70 . 1 . 70). A rough sketch sent by Mr. Cooper 

 with the specimens represents a pale pinkish Chromodoris, with orange 

 blotches on the back and yellow spots on the sides. The rhinophores 

 and the 10 simply pinnate branchiae are violet-coloured. 



Chromodoris aureo-marginata, Cheeseman. 



Chromodoris aiireo-marf/inata, Cheeseman : Trans. New Zeal. Inst., 



vol. xiii, p. 223, 1880. 

 ? ^ Chr. marginata, Pease: Proc. Zool. Soc, p. 30, 1860 ; and Bergh, 

 Siboga Expeditie, Opisthobranchiata, p. 150, 1905. 



One small specimen from Takapuna, labelled Chr. aureo-marginata, 

 juv. It is therefore probable that when alive it agreed with 

 Cheeseman's description in coloration (pellucid white with a narrow 

 golden border), as it still docs in other respects. It is 12-5 mm. long 

 and 5 '5 broad, flattish in shape, with the mantle fairly wide at the 

 sides and amply expanded over the head. There seem to be traces of 

 small low tubercles on the back. The margins of the rhinophorial 

 pockets are somewhat raised. The branchial pocket is closed and 

 forms a small papilla. It contains 10 small, simply pinnate branchiae ; 

 the fifth plume on either side is minute. The foot is rather narrow, 

 with a simple groove in front. On cither side of the mouth is a knob- 

 like tentacle. 



The labial armature is rather faint. It is an imperfect ring composed 

 of close-set, short, mace-like rods, swollen and bent at the tips. The 

 radula consists of 50 rows, three of which are imperfectly developed, 

 containing about 45 teeth on either side of the rhachis, which bears 

 inconspicuous thickenings. Tlie first lateral is broad and appears 

 trifid, but the prominence on the inner side bears 2-3 denticles. The 

 second lateral is also broad, but lacks this prominence on the inner 

 side. Apart from its greater breadth it has the same shape as the 

 other teeth, namely, two large prongs at the apex, and below thera 

 3-6 denticles, which diminish in size downwards. The outermost 

 teeth bear about four denticles on the tip. 



This form is nearly allied to Chr. marginata (Pse.), and perhaps 

 merely a variety of it. The coloration is very similar and the radula 

 is rather narrow in both species, 50 X 45 . 1 . 45 in this specimen, and 

 54 X 35 . 1 . 35 in that examined by Bergh. But the similarity in 

 coloration is not complete, and there is a difference in the shape of the 

 teeth. In Chr. marginata Bergh found them simply hamate and 

 denticulate, but in this species the upper denticles are strongly 

 developed, and the teeth appear bifid as in Chr. hilaris and Chr. 

 panther ina. 



