354 Mr. H. J. Carter on some West-Indian 



Cliona mucronnta. Spinispirula 0*0006 inch long. C. 

 ensifera. Spinispirula the same. C. suhulata. Spinispirula 

 thinner and longer, measurement not given. (Sollas, ibid. 

 1878, vol. i. p. 54, pis. i. and ii.) 



Vioa Johnstonii, Sdt. (Spong. Atlant. Gebiet. S. 5, Taf. vi. 

 f. 8). Colour carmine. Spinispirula four bends, 10 to 15- 

 6000ths incli long. Type specimen in the British Museum. 



Vioa Schnidtii, Carter, = V. Johnstonii, Sdt. (Spong. 

 Adriat. Meeres, S. 78, Taf. vii. fig. 17). Skeleton-spicule 

 acerate ; flesh-spicule stelliform. 



Rhaphidliistia spectahilis, Cart. Mauritius ('Annals,' 1879, 

 vol. iii. p. 300, pi. xxviii. figs. 13 and 14). Skeleton-spicule 

 acerate ,• flesh-spicule a spinispirula of nineteen bends, l-300th 

 inch long. The longest and most beautiful that I have 

 seen. 



Vioa Carteri, E-idley (Proc. Zool. Soc. 1881, p. 129, pL xi. 

 figs. 2 and 2 h). Colour carmine. Spinispirula '0412 niillim. 

 long = 8-6000ths inch. " Victoria Bank," oft^ S. Brazil. 



It must not be thought that the foregoing list embraces the 

 whole of the Suberites proper (that is, the sponges which 

 belong to the four groups above mentioned), but rather only a 

 few of them, to show that the pin-like skeletal spicuk^. is often 

 accomjmnied by a spinispirular or otlicr flesh-spicule, as well 

 as often without it. There are, of course, scores of instances 

 in which neither might be the case, ex. gr. Suherites JistulatuSj 

 in which the skeleton-spicule is inflated at both ends and the 

 flesh-spicule an equianchorate (' Annals,' 1880, vol. vi. pi. v. 

 fig. 22). Or the skeleton may be acerate (pointed at both 

 ends) and the flesh-spicule a stellate, as just noticed in Vioa 

 Hclimidtii, Carter. Then, in general form, the species may 

 be furnished with long tubular appendages, as in S. fistulatus 

 also ; or the colour may be soot-black, as in S. fuliginosus 

 ('Annals,' 1879, vol. iii. p. 347, pi. xxviii. fig. 9). In short, 

 there are so many more sponges already described, and so 

 many more likely to be discovered which might be relegated 

 to one of the four groups mentioned, that, although in my 

 " Notes " &c. I have proposed to give a third part, in which 

 these and every other published species of sponges would be 

 catalogued, I must, for want of time, leave this useful compi- 

 lation to some one else, and content myself with the few sug-' 

 gestive remarks (notes) that I am now making. 



There is also the genus ^''Latranculia''^ of Bocage, in wliicli 

 an acuate or acerate skeleton-spicule, as the case may be, is, 



