ELIOT : NTJDIBEANCHIATA FROM CAPE VEED ISLANDS. 135 



The larger specimen is very flat and much bent. It is about 15 mm, 

 lono^, 7 mm. broad, and 4 mm. high. The dorsal surface is covered 

 with warts of various sizes, bearing smaller prominences. The integu- 

 ments are full of spicules, which are fairly straight rods, not branched, 

 but jointed. The pockets of the rhinophores and branchiae do not 

 project, and their margins bear tubercles which are similar to those 

 wliich cover the rest of the dorsal surface, and are not specially 

 developed to act as lobes or delerices. The branchiae are ten in 

 number, long and simply pinnate. The foot is large, nearly as long 

 as the bodv, and 6 mm. broad. It is grooved in front, but not notched. 

 The tentacles are much as in ArchtdoriH tnherculata. 



No labial armature was found. The radula consists of 38 rows, 

 -^^ith a formula of about 30 . . 30, The teeth are hamate, rather 

 straight and stout, with long bases. The innermost and outermost 

 are not so large as those in the middle of the half-row, and the two or 

 tliree outermost are quite small. 



No armature was discovered in the genitalia. 



The common S. verrucosa shows great variation in the size and 

 number of the dorsal tubercles, and these specimens might be regarded 

 as a variety in which the usual protective valves of the rhinophores 

 and branchiae have not been developed. I hesitate, however, to take 

 tills view without further evidence, because the dorsal tubercles in the 

 present specimens are not smooth and clavate, but low, rough wai-ts 

 l»earing secondary projections. The radula also is narrower than is 

 usual in S. verrucosa. 



DiscoDORis, Bergh. 



This genus consists of rather large animals of a flat shape, with 

 a granulated or minutely tuberculate doi-sal surface, and usually 

 a wide mantle margin completely covering a moderately broad foot. 

 A labial armature is present. The radula has no central tooth, but 

 bears a considerable number of simply hamate laterals. There is no 

 armature in the genitalia, but a prostate is present. 



Platydoris somewhat resembles Discodoris in general appearance, 

 but has a peculiar hard consistency, a characteristic armature in the 

 genitalia, and no labial armature. 



Bergh, in his System der Nudibranchiaten Gasteropoden, enumerates 

 eighteen species, to which the following have since been added : 

 (19) D. Edwardsi, Vayssiere ; (20) tristis, Bergh; (21) erubescens, 

 Bergh ; (22) maculosa, Bergh ; (23) duhia, Bergh ; (24) egena, Bergh ; 

 (25) Heathi, MacFarland ; (26) labifera, (.Abraham); (27) Z). (??) 

 Sibogce, Bergh; (28) Z). (?) Uturata, Bergh; (29) i). (?) lutescens, 

 Bergh ; (30) I). (?) versicolor, Bergh ; (31) Z>. (?) rubra, Bergh. The 

 last live forms are regarded by Professor Bergh as only doubtfully 

 referable to Discodoris, and it must be admitted that many of the 

 species described agree only incompletely with his original definition 

 of the genus. 



Most of the species are recorded from the Indo-Pacific, but D. notha 

 and muta are from the West Indies, B. Edwardsi from the west coast 

 of Morocco, D. tristis from the Azores, D. erubescens from Naples, 



