2 ' Spong, 
SPONGIIDA. 
7. [Duncan, P. M.] On an Organism which Penetrates and Excavates 
Silicious Sponge -spicula {Sjjongiophagus carteri). Ann. N. ,11. (5) 
viii. p. 120. 
8. . On a Padiolarian and some jMicrospongida from considerable 
depths in the Atlantic Ocean. J. R. Micr. Soc. (2) i. p. 173, pi. iii. 
9. Nassonow, N. Ueber das aushohlende Kraft und zum feinere Ban 
der Olione. Zool. Anz. iv. p. 459. 
10. Potts, E. Some new Genera of Fresh-water Sponges. P. Ac. 
Philad. 1881, p. 149. 
11. . The genus Carterella vs. Spongiophaga pottsi ; P. Ac. Philad. 
1881, p. 460. . , , , 
12. Ridley, S. 0. Spongida: in Account of the Zoological Collections 
made during the Survey of H.M.S. ‘Alert’ in the Straits of 
Magellan and on the Coast of Patagonia. P. Z. S. 1881, pp. 107-137, 
pis. X. & xi. 
Several new species are described and notes ate given on species of 
Lamarck, Bowerbank, &c. ; also tables of distribution, and of variation. 
13. — — . On the genus Plocamia^ Schmidt, and on some other Sponges 
of the Order Echinonemata, with Descriptions of two additional new 
Species of Dirrhopalum by P. M. Duncan. J. L. S. xv. p. 476, 
pis. xxviii. & xxix. 
14. Schulze, F. E. Untersuchungen uber den Bau und die Entwicke- 
lung der Spongien. X*® Mittheilung. Corticium candelabrum^ O. 
Schmidt. Z. wiss. Zool. xxxv. p. 410, pi. xxii. 
15. VosMAER, G. C. J. Aanteekeningen over Leucandra aspera, H. 
Bijdrage tot de kennis der Kalksponzen. Leyden: 1880, 8vo, 
2 plates. 
An Inaugural Dissertation in Dutch. After a review of the chief 
works on the Galcarea, gives a detailed account of the anatomy and his- 
tology of Leucandra aspera^ concluding with a discussion on the relation- 
ship of ihOiLencones to the other Calcarea^ and of the different groups of 
Sponges inter se, in which the characters of the canal system are strongly 
insisted upon. A German version by the author embodies the greater 
part of the above, under the title, Ueber Leucandra aspera, H., nebst 
allgemeinen Bemerkungen iiber das Canalsystem der Spongien : Tijdschr. 
Nederl. Dierk. Yer. v. p. 144, pis. iii. & iv. [The references below are to 
the German version.] 
16. Wright, E. P. On a new Genus and Species of Sponge {Alemo 
seychellensis) with supposed heteromorphic Zooids. P. R. Irish Ac. 
xxviii. p. 13, pi. i. 
Schulze, F. E. Ueber den Badeschwaum. MT. Yer. Steierm., 1881, 
p. xlviii. 
[Not seen by the Recorder.] 
