dredged up from the Gulf of Manaar . 51 



Hab. Marine. On hard objects. 



Loc. Gulf of Manaar. 



Obs. Like the last species but for the form of the skeleton- 

 spicule no. 1. Named after Mr. T. J. Moore, the assiduous 

 Conservator of the Liverpool Free Museum. 



Hymedesmia spinatostellifera, n. sp. 

 (PI. IV. fig. 13, a-d.) 



Laminiform, extremely thin, spreading, smooth or hirsute. 

 Salmon-colour. Spicules of two forms, viz. : — 1, pin-like, 

 very long and slender, smooth, curved, head at first round 

 and smooth, then elongated transversely by a convex ad- 

 dition to both sides, and, finally, by similar growths all 

 over so as to become tuberose, shaft 130 by l-1800th, head 

 much larger than the shaft (PI. IV. fig. 13, a and b) ; 

 2, stellate, multiradiate, rays conocylindrical, spined in an- 

 nular rows towards the extremity, fixed on a body which 

 is about one third of the diameter of the whole stellate, 

 10-6000ths in diameter (fig. 13, c and d). Linear spicules, 

 where exposed, imbedded among the stellates, but erect 

 and projecting where protected. Size variable ; that of speci- 

 men extending over the whole of a Melobesian nodule upwards 

 of an inch in diameter. 



Hab. Marine. On hard objects. 



Loc. Gulf of Manaar. 



Obs. This species is characterized by its pink or salmon- 

 colour, the peculiar tuberose form of the head of the linear 

 spicule when fully developed, the large size of the stellate, 

 and the peculiar form and microspination of its rays. 



Hymedesmia capitatostelltfera, n. sp. 

 (PI. IV. fig. 12, a-c.) 



Laminiform, extremely thin, spreading, sparsely hirsute. 

 Colour snow-white. Spicules of two forms, viz. : — 1, pin- 

 like, curved, smooth, long, setaceous, head oval and wider 

 in diameter than the shaft, which is 80 by l-1800th 

 (PI. IV. fig. 12, a) ; 2, stellate, with large globular body, 

 multiradiate, rays terminating in a globular, inflated, and 

 spined head with constricted neck, 12-6000ths in diameter 

 (tig. 12, b and c). Pin-like spicule fixed by its head in 

 the sarcodic layer of the sponge, which is densely charged 

 with the stellates. Size variable, that of specimen about 

 ] inch in horizontal diameter. 



Hab. Marine. On hard objects. 



Loc . Gulf of Manaar. 



4* 



