144 A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



Ray Lankaster (109) dwells en Chlorophyll and Amyloid deposits 

 in Spongilla. 



I published a short note on the growth of the Hornfibres of 

 sponges (Aplysinidse) (110). 



Polejaeff (111) dwells in detail on the Spenna und Sperma- 

 togenesis in Sycandra raphanns. 



In another paper (112) I gave the results of my researches on 

 three species of Australian Aplysinida3. 



Besides endorsing Schulze's discoveries, I was enabled to draw 

 attention to some new facts concerning the structure of sponges. 

 Gland cells producing a slimy covering on the surface of the 

 sponges when in unfavourable circumstances, similar to those 

 discovered by Merejkovsky (112a) in Halisarca, were described. 

 The formation and growth of ova and spermatozoa were studied, 

 and several doubtful points elucidated by my researches. 



Classification and Systematic Position. 



Continuing from page 141, we record the following papers on 

 this subject. 



Gray (113) publishes a classification of the sponges amended in 

 another paper. (114). 



(109). Kay Lankaster. On the Chlorophyll-corpuscles and Amyloid deposits 

 of Spongilla and Hydra. Quart. J. Micr. Sc, Vol. XXII., p. 229. 



(110). R. von Lendenfeld. Das ffornfaserwachsthum der Aplysinidce. 

 Zoologischer Anzeiger. Band V., Seite. 634. 



(111). N. Polejaeff. Ui bt r das S/> rma und die Spermatogenese bei Sycandra 

 raphanus. Sitznngsberichte der k. Akad. Wise. Wien. Math, nat Classe 

 I. Abth. 86, Band 3 5 Heft., Seite. 276—298. 



(112). K. von Lendenfeld. Ueber Ccelenteraten der Siidsee. II. Neue 

 Aplysinidce, Z.f.w.Z. Band XXXVIII., Seite. 234. 



(112a). Merejkovsky. Etudes sur les Epong dela mer blanche. Mem.de 

 VAcad, de Petersbg., 1S78. 



(113). J. Gray. On the classification of Sponges. Ann. Mag. (Series 4), 

 V T ol. XL, p. 442. 



(114). J. Gray. On the arrangement of Sponges. Ann. Mag., Vol. XIIL, 

 p. 284. 



