396 Mr. H. J. Carter on 



are divergent around the central one, which is also straight; 

 rays microspined, straight and pointed, or florally arranged and 

 capitate, the whole rosette about 15-6000ths in. in diameter, 

 but variable in size, the smallest being those in which the 

 rays are most numerous, florally arranged, and capitate. 

 As the dermal sexradiate, together with its structure in situ, 

 has, of course, been destroyed, the former is only met with 

 here and there in the body-structure, where, as usual, it is 

 characterized by the external ray having been reduced to a 

 mere tubercle. Size of specimen (not including the expanded 

 base, which, after having been much reduced in size by frac- 

 ture, is still 3f in. in its longest diameter) 4£ in. high. 

 Stem 1 in. long by 7-8ths in. in diameter close to the head, 

 increasing downwards towards the foot ; head about 4 in. high 

 by 3| in. in diameter at its upper part, diminishing in this 

 respect towards the stem; excavation 4 in. deep by 1 5 in. 

 wide at the brim ; fenestral openings of the clathrous struc- 

 ture, which surrounds it, varying a little below ^ in. in 

 diameter. 



Hub. Marine. 



Loc. Japan ; Misaki, at the entrance to the Bay of Tokio 

 (Yedo). 



Obs. Having long since received, through the kindness of 

 Dr. W. Marshall, of Leipzig, a copy of his description, photo- 

 graphed representation, and forms of the spicules of his Peri- 

 phrageUa Elisce, in the Imperial Museum at Leyden, originally 

 obtained at the Moluccas (Zeitschrift f. wiss. Zool. xxxv. Bd. 

 Suppl. p. 177, Taf. xii. B, and xiv. figs. 26-31), together 

 with a type specimen of the spiculation itself on a slide, I 

 have no hesitation whatever in identifying with this species 

 the above specimen from Japan ; sufficient, together with its 

 general form, having been extricated from it for this purpose. 

 The characteristic globular heads of the rays on the scopuline 

 spicule, with their short angular spines, are retained in the 

 half-incorporated fragment to which I have alluded ; and 

 the barbula, although much reduced, like the rest of the 

 structure, by that process of disintegrating dissolution which 

 attacks these glassy sponges after death, is easily recognized. 



Periphragella Elisce, in its general form, differs from most 

 specimens of the Euritidse in the presence of a cup-like exca- 

 vation in the midst of the tubo-branched structure, together 

 with diminution in size of the branches of the latter towards 

 the outer and lower parts of the head, and in its spicular 

 forms, chiefly by that of the scopula or " Besengabel," which 

 up to this time is peculiar in this respect. 



It is, like the rest of the Euritida 1 , analogous to the Kera- 



