Aphelodoris.] GASTROPODA. 577 



3. Aphelodoris (?) purpurea, Bergh, 1905. 



Aphelodoris (?) purpurea, Bergh, Semper's Reise Philipp.. Malae. Vnters., 

 vi, 2, 1904 (1905), 77. 



The only specimen, preserved in alcohol, was soft and much bent ; 

 its form most likely oval, somewhat depressed, back flat, mantle-edge 

 moderately broad. Colour of the back purplish ; the clubs of the 

 rhinophores reddish-yellow ; branchiae on the outer side of the same 

 colour, inner side reddish-brown ; under-side yellowish. The pockets 

 of the rhinophores are round. The round branchial opening 5 mm. 

 wide, with raised margin. Bronchia? 6, tripinnate ; the anal papilla 

 posterior, and not much raised. Tentacles lappet-shaped, with a longi- 

 tudinal groove of 1-5 mm. length. Foot rounded anteriorly. Tail short. 

 Mantle and lamellse of the rhinophores without spicules. (Bergh.) 



Length, 22 mm. ; breadth. 15 mm. ; height, 10 mm. 



Dr. Bergh supplies some information on the internal organs, but 

 the radula was not examined. 



Hal). Between Kaipara and New Plymouth, by trawl (Professor 

 Benham). 



Remarks. The fragmentary investigation of the animal, especially 

 the omission of an examination of the radula, leaves the generic position 

 of the animal doubtful. It resembled somewhat the Chromodoridce, 

 and belongs perhaps to the genus Aphelodoris. (Bergh.) 



Fam. DORIOPSID^J 



Dondopsidce. 



The members of this family are simulating the true Dorididce, 

 but may be recognised by the poriform mouth and the very small 

 adherent oral tentacles. The form is mostly plump, not elongated, 

 the dorsal surface smooth or tuberculate. Mantle-edge rather broad, 

 wavy, covering the head and sometimes the tail. Pockets of the 

 rhinophores mostly with a smooth margin, the rhinophores completely 

 retractile, usually with 25-35 lamellso. Branchiae arranged in a circle 

 round the anus, situated on the dorsal surface above the mantle-border, 

 their number varying from 4 to 8, tri- or quadri-pinnate. Jaw and 

 radula are wanting, the pharynx being suctorial. Genital pore on the 

 right anterior side. 



They inhabit mostly tropical and warmer seas. 



Genus 1. DORIOPSIS, Pease, 1860. 



Doriopsis, Pease, P.Z.S., 1860, 32. Type: Doris limbata, Cuvier. Doridopsis, 

 Alder and Hancock, 1864. Haustellodoris, Pease, 1871. Rhucodoris, 

 Morch, 1863. Hexabranchus, Gray ; not of Ehrenberg. Dendrodoris, 

 Ehrenberg. 



The external characters are very similar to Doris, but of a softer 

 consistency and with an undulating mantle-edge ; the mouth is a 

 fine pore. The buccal ganglia at the posterior end of the pharyngeal 

 bulb in front of the salivary glands. The spawn is ribbon-shaped. 



19 Moll. N*./.. 



