Discodoris voniheringi Sp. Nov. 

 Plates XIII, XIV, XV; figs. 66-76. 



One specimen of this new species was taken at Riacho Doce 

 Alagoas, July 20, 1899, by Mr. Greeley. No color notes accom- 

 panied the specimen, which was killed in formalin, afterward 

 followed by alcohol. 



EXTERNAL CHARACTERS 



Form. The general body form is depressed, elongate, ellip- 

 tical, the ends equally rounded, the mantle margins rather wide 

 and thin, projecting far beyond the edge of the foot, the sub- 

 marginal space nearly equalling the width of the foot itself. 



Color. The ground color of the dorsum is pinkish gray, 

 sprinkled everywhere with minute dark brown, or black spots' 

 The under surface of the mantle and the sides of the body are a 

 lighter pinkish, thickly sprinkled with minute dark spots, giving 

 the surface a dusty appearance. Upon the under surface of the 

 mantle on either side is borne a longitudinal series of three to 

 four large round brownish blotches about midway between the 

 mantle edge and the sides of the body. The largest of these spots 

 reaches a diameter of 2.0 mm. Posteriorly this series is continued 

 around above the top of the foot by a series of six or seven much 

 smaller spots more irregularly disposed. 



Dorsum. The dorsum is rather firm, tuberculate, being 

 covered everywhere with low tubercules of varying size, inflated 

 at their tips and much thicker than the slender cylindro-conical 

 processes covering the dorsum of the preceeding species. The 

 largest of these tubercules reach a diameter of i.o mm., and 

 occupy the summits of slight elevations of the dorsal integument, 

 having smaller and lower tubercules irregularly grouped around 

 them. 



Foot. The foot is smooth, rounded in front, its anterior 

 margin deeply bilabiate, the upper lip projecting beyond the 

 lower, and deeply notched to a depth of 0.5 mm. The sides of 

 the foot are nearly parallel, gradually converging posteriorly to 

 the bluntly rounded tail, which does not project beyond the 



