'1 \ 



form a transition to the Tritoniadai 

 the liolohepatic and the cladohepatic nudibranchiata, 



mi the dorsal side quite like that of the Dorididae, in which 

 eciall) strongly contracted; but this cleft and the j^ill itself 

 id the .iiiu> has moved from the dorsal side down on (the right) sidi ol 

 stic gives them a resemblance to the Tritoniadae, which form the 

 •ik of the Cladohepatica. And this resemblance is still greatei bj the fact that the strong 

 bulbus | prodded with powerful mandibles situated on il ide as in the Trito- 



Bj th« mandibles 1 ) the Doridoxidae arc otherwise nearly related to the 



e, with which they alx. correspond with regard to the structure of the radula, this also 

 median tooth-plates, a feature otherwise rather van- in the Dorididae 

 Hitherto the family contains only the genus 



Doridoxa, Bgh. N. gen. 

 and this genus contains only the one species, described below. 



Doridoxa Ingolfiana, Bgh. n. sp. 

 PL II. figs. 3-15; PL III, figs. 1-3. 



One specimen of this species was taken in [895 at a depth of 55 fathoms, at station 34, Le. 



f I. at. X. 5.1 17' I.011- W. 



It was generally of a yellowish white colour, the back more whitish. The length was 12""" 

 1 breadth of j : " : " and a height of 5"""; the- length of the foot was i<fc, im " by a breadth the 



breadth of the head was 5""", of which breadth rs 1 "" 1 belongs to each tentacle; the height of the 

 rhinoph ', the breadth of the mantle-brim 1175""". The consistency of the animal 



rati: 



The intestines were nowhere to he seen from without. 



The form was oval, the hinder end a little move pointed (pi. II, fig. 3). The hack was evenly 

 ■ rly between the rhinophores it joined the somewhat projecting hinder margin of the 

 ';; it was everywhere rather densely covered with small and quite small, semiglobular, and more 

 1 papulae. The margin of the hollows of the rhinophores was slightly projecting, everted and 

 lightly projecting) club of the rhinophores was perfoliate; tin dorsal brim was only a 

 littli ting, the mar-in rather sharp, the lower side smooth. The head was rather large, some- 



what fl with a rather projecting hinder edge, a little produced on either side; witli rather 



like tentacles; the outer mouth was round (pL II, fig. 3). The sides of the body 

 and behind, otherwise rather high, quite smooth; anteriorly to the right is seen 

 ipilla witli the prominent little penis, and behind this the vulva (fig. 3); at the 

 • fourth part of the length <>i the body was the projecting anal papilla, 

 his the smaller renal papilla (fig. 3). Tin foot was powerful, hut narrower than 



tic group quite siniilai mandibles are sun. in Bornella, S< Uiroidae, 



