dredged up from the Gulf of Manaar. 53 



different form, but the whole composed of one only, viz. pin- 

 like, and that, too, not characterized by any one in particular 

 being longer than the rest. It often presents a bluish-green 

 tint (now dry) like that of a similar species on the rocks here 

 (Budleigh-Salterton) ; but the head of the latter is different in 

 form, viz. globoconical followed by an inflated ring like that 

 of Suberites (Halichondria, Johnston) carnosa. It may be 

 remembered that the colour of the British species (which, when 

 fresh, is cobalt-blue) is owing to the presence of a minute 

 parasitic Oscillatoria, for which I have proposed the 

 name of " Hypheothrix ccerulea" ('Annals,' 1878, vol. ii. 

 p. 164). How far this, as well as the British species, may 

 be that which, under other circumstances, grows into a larger 

 and distinct form of Suberite, I am not able to state ; all that 

 I can say is that both are frequently found under the condi- 

 tions above mentioned. 



Suberites fstulatus, n. sp. (PI. V. fig. 22, a, b.) 



Irregularly globular, elongate, sessile, appendiculate, the 

 appendages consisting of long tubular extensions of different 

 sizes, irregularly scattered over the surface, which is otherwise 

 even. Colour now pinkish brown. Internally cavernous, 

 densely charged with two forms of spicules, viz. : — 1, linear, 

 fusiform, slightly curved, and inflated at both ends, which 

 are microspined, 23 by i-1800th (PI. V. fig. 22, a) ; 

 2, equianchorate (flesh-spicule), naviculiform, 8-6000ths long, 

 comparatively large and numerous (fig. 22, b). The tubular 

 appendages are prolonged from large vents, which are in 

 connexion with the cavernous structure of the body. Size of 

 specimen 3 inches long, 3 broad, and 1\ high. 



Hab. Marine. On hard objects. 



Log. Gulf of Manaar, and Freemantle, S.W. Australia. 



Obs. Having found a minute portion of this sponge on one 

 of the Melobesian nodules of the Gulf of Manaar, I at once 

 recognized in it the spiculation of the sponge above de- 

 scribed, which is in the general collection of Dr. Bowerbank's 

 sponges purchased by the British Museum. The cavernous 

 and cork-like consistence claims for it a place among the 

 Suberitida. 



Placospongia melobeswides, Gray (Proc. Zool. Soc. Jan. 1867, 

 p. 127, woodcut, fig. 1). 



General character largely and irregularly placophorous, 

 hard, petrous, Geodia-like, dichotomously branched ; branches 

 angulatcd irregularly and therefore variable in diameter. 



