84 OPISTHOBRANCHIATA OF BRAZIL 



6. Peltodoris rubescens Bergh. 



Malay Archipelago. Bergh, Siboga Exp. 1905. 



To this list is to be added the following new species, taken 

 by Mr. Greeley at Riacho Doce, Alagoas, July 28, 1899. 

 Peltodoris greeleyi Sp. Nov. 

 Plate XV, figs. 77-82. 



But one specimen is in the collection, no notes save that of 

 locality and date accompanying it. The animal was rolled up in 

 a loose coil, and was apparently not much shrunken by the pre- 

 serving fluid. 



EXTERNAL CHARACTERS. 



Color and form. The color of the alcoholic specimen is very 

 pale yellowish pink everywhere, there being no special markings. 

 The dorsum is villous, quite velvety to the touch and quite 

 similar to Diaulula in this respect. It is equally rounded in front 

 and behind, the general body shape being oblong elliptical, with the 

 wide, rather fleshy mantle edges projecting well beyond the foot. 



Branchiae and rhinophores. The thirteen branchial plumes 

 are short, simply pinnate and arranged in a complete circle about 

 the anus, which occupies the summit of a low papilla, the minute 

 pore-like renal opening being situated as usual, a little to the 

 front and right. The branchiae were completely retracted within 

 the branchial pocket, the thin margin of which is prominent, 

 minutely villous, and slightly inrolled. The antero-posterior 

 diameter of the opening is 2.8 mm., the transverse slightly less. 

 The margins of the sheath of the deeply retracted rhinophores 

 are similarly villous. The clavus of the rhinophores is club 

 shaped and perfoliate, with sixteen leaves on either side. The 

 tentacles are short, conical and dorso-ventrally flattened. 



Foot. The foot is broad and muscular, contracted, the 

 anterior end rounded and bilabiate, the upper slightly notched. 



Dimensions. The approximate length of the partly rolled 

 up specimen is 18.0 mm., with a maximum width of 10.0 mm. 



INTERNAL ANATOMY. 



Integument. The dorsal integument is thin, strengthened 

 everywhere with minute spicules. Around the base of each 

 papilla of the velvety surface of the dorsum is arranged a radial 



