318 A. H. Clark. 



examplos from the Canaries and from tho Equatorial Island, Rolas, in the 

 Gulf of Guinea, are doubtless of the same nature. They have been describ- 

 ed as Antedon rosacea, and I find some difficulty in differentiating the 

 Madeira specimens aniong the many forms of this protean species. One 

 of the chief characters of Böhlsche's type is the presence of a minute plate 

 between the first costals (second radials, auct.) {i. e., the I Br^ and 

 I Br.,). But this intercostal (i. e., interprimibrachial) plate is not well 

 marked in the ,,Challenger" specimens of A. düheni, though it reappears 

 in all those from Madeira, in which also the first two brachials have sharp 

 and straight outer edges. The latter feature, however, is very characteristie 

 of the Naples variety oi' Antedon rosacea, in which, too, the intercostal plate 

 sometimes appears, while both peculiarities occur in examples of this type 

 from Ilfracombe, Müford Haven, the Shetlands, and the Faroe Channel 



The Madeira specimens are unquestionably identical with those 



from Brazü 



In the ,,Challenger" report Carpenter gives an exceUent figure 

 (plate 37, fig. 2) of the type specimen of Böhlsche's Antedon dübenii, en- 

 larged six times, and a similarly enlarged figure (plate 37, fig. 3) of the 

 arm base and the first two pinnules. These figures bring out very well 

 the general characteristics of the form. P , has twenty-four segments ; the 

 cirri have 14, 13, 12 (twice) and 10 segments; the arms are between 

 35 mm and 40 mm long. 



It is evident from what Carpenter says that the specimens of Ajite- 

 don from Madeira belong to the di'ihenii-moroccana type of the genus and, 

 on account of the proximily of the Islands to the African coast, I have, 

 guided by what Carpenter has said, referred them to A. moroccana. 



The specimens from the Azores and all avaüable specimens from 

 Portugal should be reexamined. The former probably and the latter possi- 

 bly represent A. moroccana. 



