Spong. 1 
SPONGIIDA. 
BY 
Stuart 0. Ridley, M.A., F.L.S., F.R.M.S. 
Chief Works on Recent Sponges. 
1. Bowerbank, J. S. A Monograph of the British Spongiadcc ; edited, 
with additions, by the Rev. A. M. Norman. Vol. iv. (supple- 
mentary). London : 8vo (Ray Society), 17 pis. 
This work contains a classified list of British Sponges, with minute sub- 
divisions of the genera, and descriptions of 35 species regarded as new 
by Bowerbank. The whole of the known British species recognized by that 
author are enumerated, with references and notes added in many instances 
by him, and also by the Editor, who gives tables of their vertical and 
horizontal distribution within the British Isles, and an appendix dealing 
with the described British species not recognized or referred to by 
Bowerbank in his “ Monograph,” also a comprehensive list of previous 
works on Sponges. Only the more important of the synonymical changes 
are given below. 
2. Carter, H. J. Some Sponges from the West Indies and Acapulco, 
in the Liverpool Free Museum, described, with general and classifica- 
tory remarks. Ann. N. H. (5) ix. pp. 266 & 346, pis. xi. & xii. 
Describes a number of Sponges of various Orders from various locali- 
ties, and gives a classified list of many of the typical Suberitidce , with short 
distinguishing characters. 
3. . Form and Nature of the Cirrous Appendages on the Statoblast 
of Carterella latitenta , Potts, &c., originally designated “ Spongiophaga 
pottsi .” Tom. cit. p. 390, pi. xiv. 
The appendages are not Spongiophaga , but apparently in some way 
analogous to it. 
4. . New Sponges, Observations on old ones, and a proposed new 
Group. Op. cit. x. p. 106, 2 woodcuts. 
5. . Spermatozoa, Polygonal Cell-structure, and the Green 
Colour in Spongilla, together with a new Species. Tom. cit. p. 362, 
pi. xvi. 
