list of publications. .Spong. 3 
18. 0 Polejaeff, N. Versuch eines naturlicher Systems der bekannten 
Spongien. St. Petersburg : 1885. 
19. Potts, E. Biology of Fresh- water Sponges. Am. Micr. J. ix, 3, 
pp. 43-46, and 4, pp. 74-77. 
Reprint of the introduction to monograph in P. Ac. Philad. ii, 1887. 
20. Priest, B. W. On some remarkable Spicules from the Oamaru 
Deposit. J. Quek. Club (2), iii, 22, July, 1888, pp. 254-256, 
pi. xix. 
21. Schmidt, — . Sponge Fisheries. Method of artificial propagation 
at Gratz. Nature, xxxvii, p. 595. 
22. Sollas, W. J. Report on the Tetractinellida collected by H.M.S. 
‘ Challenger,’ during the years 1873-76. Challenger Reports, xxv, 
clxvi & 458 pp., 44 pis., and 1 map. 
Contains description of all known species ; 33 new genera and 73 new 
species are defined. An appendix on the Monaxonida is added, with 
diagnoses of 2 new genera and 5 new species. 
23. . A contribution to the History of Flints. Sci. P. R. Dubl. 
Soc. vi, pt. i, pp. 1-5. 
24. Topsent, E. Sur les gemmules de quelques Silicisponges marines. 
C.R. cvi, No. 18, pp. 1298-1300. 
The author describes gemmules found in Chalina oculata , C. gracilenta, 
Cliona vastifica , and Suberites ficus. Extract in Rev. Sci. xli, No. 19, 
pp. 603 & 604, and in Ann. N. H. (6) i, pp. 457 & 458. 
25. . Notes Spongologiques. Arch. Z. exp4r. (2) vi, 3, pp. xxxiii^ 
xliii. 
Amended definition of genus Dendroryx , Gray. Description of D. 
luciensis , n. sp. The larval condition of Spongelia ( Dysidea ) fragilis 
exactly resembles that of S. pallescens. 
26. . Etude de la Faune des Spongiaires de Luc (3rd list). Bull. 
Soc. L. Norm. pp. 330-335. 
27. — — . Notes de Spongologie. T. c. pp. 34-41. 
28. . Contribution & l’6tude de la distribution des Sponges de la 
Manche. T. c. pp. 71-73. 
29. ** Contribution A l’6tude des Clionides. Paris : 1888. 
30. Tunis, Sponge Fishery at. Report of Consul. Nature, xxxviii, 
p. 349. 
31. Weltner, M. Ueber das Fortleben von Spongillen nach der 
Ausbildung von Scliwarmlarven. SB. nat. Fr. 1888, No. 2, pp. 18-22. 
32. . On the survival of JSpongillce after the development of Swarm- 
larvse. Ann. N. H. (6) i, 1888, pp. 340-343. 
The author opposes Lieberkiihn, Metschnikoff, and Gotte on various 
points. 
