AMPHIURIDAE 269 



Amphiura grandisquama, Lyman 



Amphhira grandisquama, Lyman, 1869. Prelim. Report on the Ophiuridae and Astrophytidae 

 dredged in deep water between Cuba and the Florida Reef. Bull. Mus. Comp. Zool., i, 10, p. 334. 



A. longispina, Koehler, 1898. Echinides et Ophiures de r Hirondelle'. Camp. Sci. Monaco, xii, 

 p. 52, pi. ix, figs. 45-6. 



A. grandisquama, Mortensen, 1933. Echinoderms of St Helena {other than Crinoids). Papers 

 from Dr Th. Mortensen's Pacific Exped., 1914-16, Lxvi (Vid. Medd. Dansk Naturh. Foren., 



93). P- 451- 

 For other literary references see the last paper quoted. 



St. 399. iS. V. 30. Off Gough Island, 102-141 m. 6 specimens. 



The specimens are all quite small ; but I do not think there can be any doubt that they 

 belong to A . grandisquama. 



Since the species was known from St Helena and from off the Natal coast, its occur- 

 rence at Gough Island was to be expected. 



Amphiura grandisquama, var. guineensis, n.var. 

 Amphiura grandisquama, Koehler, 1914. Meeresfauna Westafrikas. Echinoderma, p. igo. 

 St. 283. 14.viii.27. Off Annobon, Gulf of Guinea, 18-30 m. Several specimens in poor condition. 



Koehler has identified directly as A. grandisquama some specimens from lie de Rolas, 

 Gulf of Guinea, stating that "lis ne differaient en rien " from specimens from the West 

 Indies or the Bay of Biscay. I find, however, that the present specimens differ from 



a b 



Fig. 10. Amphiura grandisquama, var. guineensis, n.var. Part of oral side (a) and dorsal side (b). X24. 



typical A. grandisquama in having much finer disk scales, in having often six arm spines 

 on the proximal joints, and in the outer mouth papilla being in general more rounded, 

 scale-like. Also the ventral arm plates are somewhat different from those of typical 

 grandisquama (compare fig. 10 with fig. 19 of my Echinoderms of St Helena). Further, 

 the interradii bulge conspicuously outwards between the arms. The spines show more 

 or less distinct traces of brownish colour in their basal part. 



