•^ CONTENTS. Xix 



Coelenterata. 



PAGE 



Haacke, W. — Radi'il Disposition of ^fedllsm and EcMnodennatn .. .. Part 1 48 



Pennington's (A. S.) ^British Zoophytes' ,, 49 



GoETTE, A. — Development of Awelia aurita and Cotylorhira horhonica .. ,, 81 



HuBRECHT, A. A. W. — 'New Japanese Pennatulid „ 81 



Marshall, Milnes — Sexual Organs of Hydra Part 2 256 



Metschnikoff, E. — Gastrula and Mesoderm of Ctewphores „ 256 



Fowler, G. H. — Anatomy of the If adreporaria ^ 256 



Chun, C. — Cyclic Development of Siphonophora Part 3 452 



Metschnikoff, E. — Medusae ^^ 453 



Allman, G. J. — New Hydroids ^^ 453 



^ Kyder, J. A. — New fresh-water Coelenterate — Microhydra L'yderi .. .. „ 454 



Erdmann, a. — New Zoantheas 454 



Danielssen, D. C, & J. KoHE-^'^North Atlantic Pennatididi .. .. ,, 455 



Brooks, W. K. — Origin of Metagenesis in Hydromcdnsx Part 4 625 



Bedot, M. — Nematocysts in the Siphonophora 026 



Sclater, W. L. — Stephanotrochus moseleyanus . . , 627 



Korotnefp, A. — Polypariinn ambulans 627 



Ussow, M. — New Form of Fresh-water Coslenterate Part 5 803 



Koch, G. v. — Relation between the Skeleton and the Tissues in Madrepores „ 805 



Claus, C. — Classification of the Medusx Part 6 998 



Haacke, W. — Ontogeny of Cvhomedusx 999 



Klaatsch, H. — Formation of a new stalk in Tuhidaria , 999 



'RlC^^.O'S,^. 3. — Clavularia viridis 999 



Fowler, G. H. — Anatomy of the Madreporaria , 999 



Glaus, C. — Ctenophora ^^ jOOO 



Porifera. 



Lendenfeld, R. v. — Australian Homocmla and the Hom-idermidx . . Part 1 82 



Petr, F. — Spongilla fragilis g2 



Potts, E. — Fresh-water Sponges from Mexico 32 



Vosmaer's (G. C. J.) 'S^owr/es g2 



Vejdovsky, F. — Observations on Fresh-water Sponges Part 2 257 



Carter, H. J. — Sponges from South Australia 258 



Pocta, P. — Siliceous Sponge-sp)icules from the Chalk 258 



,, „ Sponge-spicules from the Horn-stone of Briisan 258 



Schulze, F. E. — Relationship between Sponges and Choanoflagellata . . Part 3 455 



Schmidt, O. — Origin of new species owing to the loss of older characters „ 456 



Lendenfeld, R. v. — Nervous and Muscular Systems of Horny Sponges , 457 



Schulze, F. E. — Oscarella lobularis (0. Schmidt) var. cserulea .. .. 457 



Lendenfeld, R. v. — Sponge destructive of Oysters 458 



„ „ Australian Sponges 453 



Sollas, W. J. — Sponge Spicules , Part 4 628 



„ „ Artificial deposition of Crystals of Calcite on Spicides of 



Calci-sponge g29 



Frantisek, F. — Sponges of Bohemia g29 



Sollas, W. J. — Classification of Sponges 630 



Heider, K. — Metamorphoses of Oscarella lobularis Part 5 807 



GoTTE, A. — Relationship of Sponges gQg 



Wierzejski, A. — Sponge-gemm)des gQ,j 



"b 2 



