1096 A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



curved and irregularly amassed on the summits of the ciliated 

 tubes. In each group 610 long, acerates - 96 — 1 x 005, and 

 very numerous ; shorter ones 0*02 — 0"04 mm. long of the same 

 thickness. All these are inflated at the distal ends. The terminal 

 knobs form a hard pavement. They have a diameter of 

 008— 0-1 mm. 



Locality : East coast of Australia ; Sydney, Frauenfeld ; Port 

 Jackson, von Lendenfeld ; South Coast of Australia ; Bass's 

 Straits, Wendt ; Moncoeur Island, Challenger ; Port Phillip, von 

 Lendenfeld. 



16. SPECIES. SYCANDRA ALCYONCELLUM. Haeckel (I.) 



Alcyoncellum gelatinosum. de Blainville (2.) 

 Alcyoncellum gelatinosum. T. E. Gray (3.) 

 Sycidium gelatinosum. E. Haeckel (4.) 

 Grantia gelatinosa. T. S. Bowerbank (5.) 

 Grantia virgultosa. T. S. Bowerbank (6.) 



Radial tubes prismatic, mostly octagonal, coalesce with their 

 edges throughout the whole length to the low distal conus, 

 between them narrow quadrangular prismatic inter-canals are 

 situated. Dermal surface smooth, plain, regularly pannelled. 

 Gastral surface covered thickly with bristles and spines. 

 Acerate spicules forming only at the distal conus of each 

 tubus, a dense and short reversed conic bundle, the base 

 of which is a hexangular dermal pannel. Acerate spicules 

 partly club-shaped, partly nail-shaped. The inner ends are thin 



(1.) E. Haeckel. Die Kalkschwamme. Eine Monographic Band II., 

 p. 333. Band III ; Taf. LIIL, figs. 2o-2d ; Taf. LVIII. 



(2.) M H. de Blainville. Manual d'Actinologie ou de Zoophytologie, 

 Paris 1834, p. 529, pi. XCIL, fig. 5. 



(3.) T. E. Gray. Notes on the Arrangements of Sponges with the 

 Description of some New Genera. Proceedings of the Zoological Society, 

 1867, p. 557. 



(4.) E. Haeckel. Prodromus eines Systems der Kalkschwamme. 

 Jenaische Zeitschrift fur Medicin und Naturwissenschaft. Band V., Heft 

 2, p. 245. 



(5.) T. S. Bowerbank, On the Generic name Alcyoncellum. Annals and 

 Magazine of Natural History, 1869. Vol. III., p. 84. 



(6.) T. S. Bowerbank. Manuscript. 



