79 



lobe of the fout, thouL;li niucli reduced, is yet present. The fins are pointed, the proximal 

 anofle extendingf farther tlian the distal one. 



Three species may be distinguished. The only specimen in the Siboga-material belongs 

 tü a new species, a description of which follows here. 



I. Clione piinctata n. sp. (PI. V, fig. 142). 

 Stat. 165. Daram Island. i spec. 



Body: pointed at the back, not much elongated. 



H e a d : depressed, rather broad ; neck very short. 



Foot: anterior lobes thick, semi-hmar, attached throughout nearly their whole length, 

 and terminaling into an obtuse angle. Posterior lobe very short, pointed. 



Fins: short and broad (but much contracted in the specimen). 



B u c c a 1 appendages: there is only one pair of buccal cones, disposed in the ustial 

 manner. Their shape is cylindrical, not conical as in Cliotie liiiiaci7ia. 



R a d u 1 a and Hook-sacs: not investigated. 



C o 1 o u r : the skin is transparent and quite colourless ; the visceral mass exhibits a pale 

 yellowish colour, and so does the head, though here the colour is somewhat darker. The fins 

 are whitish. Very remarkable are chromatophors, scattered all over the visceral mass and the 

 head, even over the cephaloconi. The shape of these chromatophors (fig. 143) varies very 

 much; they are black, and, as I have convinced myself, they are not situated in the skin itself, 

 but beneath it. 



The specimen has been preserved in formol 4°/o. 



Length: 4 mm. 



Remarks: As I had only one specimen at my disposal, I have not ventured to 

 investigate the radula and hook-sacs, as dissection would have damaged the animal seriously. 

 I, therefore, must restrict myself to the indications noted above, in order to distinguish Clione 

 ptmctata from other species of this genus. The presence of only one pair of buccal cones, 

 and the occurrence of chromatophors has not yet been recorded in Clione. The skin which 

 is very thin and wholly transparent, consists of a pavement epithelium of polygonal cells 

 with smal! nuclei, and of a small number of unicellular glands ; muscular fibres run beneath 

 this epithelium. 



Orov and Gaimard recorded a new species of "Cy/cZ' from the harbour of Amboina. 

 This form was called by them Clio pyramidalis '), but description and figure are very obscure. 

 The fins are "ovalaires, largement fixées au corps". I should be inclined to think, that we 

 have to do with some Aplysia or Xotarchiis. At any rate I wanted to draw the attention 

 to this form. 



i) Voyage de TAstrolabe, vol. II, p. 371, pi. 27, figs. 37. 



