CONTENTS. XIU 



PAGE 



Brisinga Part 5 631 



Ano-tomy of Holothurians ,. ,, 632 



Eeteractinisra in Echinodermata Part 6 788 



Circulatory Apparatus of Eegular Uchinoids „ 789 



Structure wad Devehp/ment of Opihiuroids „ 789 



FormulcB for CoraatididcB „ 791 



Holothuroidea of the Nonxegian North Sea Expedition .. „ 791 



Histology of Digestive Canal of Holothv/ria „ 792 



Ccelenterata. 



Prodrome of the Anthozoo.n Fawna of Naples Part 1 57 



Metamorphoses of Cassiopieia borhonica „ 58 



Development of Geryonopsida and Eucopida ,, 58 



Fission of Phialidium varidhUe „ 59 



Cramhessa tagi „ 59 



Sexua.l Cells of Hydroida ,, GO 



Spermatozoa of Eydrozoo, „ 60 



Characters of Stinging-Cells of Coslente-rata Part 2 200 



Development of the Ccelenterata „ 201 



Nervous System of Eydroid Polyps „ 202 



Per/MrkaMe Orga,n in Eude-ndrhxm ra;mosum „ 203 



Sipjhonophora of the Bay of Na/ples „ 204 



Ctenophora of the Bay of Naples „ 204 



Clavularia prolifera Part 3 849 



Develop/meat of Calcareous Skeleton of Asteroides .. .. Part 4 514 



Development of Mquorea „ 515 



Tissues of Sipihonopihora Part 5 633 



Development of Tubularia cristata .. „ 634 



American Acaleph(B „ 634 



Sense of Smell in Actinice „ 635 



Studies on Ccelenterates Part 6 792 



Organization of Hydrmd Polyps „ 793 



Hydra „ 794 



Vital Phenomena of Actinice „ 794 



Ovaries of Actinice „ 795 



Skeleton of Madrepores .. „ 795 



Studies on Gorgoniadce „ 796 



Development of Alcyonaria „ 797 



Porifera. 



Attempt to Apply Shorthand to Sponges Part 1 61 



Spcmges of the Gulf of Triest Part 3 350 



Spongiojjhaga in Fresh-water Sponges „ 350 



New Fresh-water Spjonges „ 351 



Hybridization in Fresh-water Spxmges Part 4 515 



Boring Spjonges „ 516 



Manual of the Sponges Part 6 797 



Development of Reniera filigrana „ 798 



New Fresh-water Sponges „ 798 



Protozoa. 



Flagelhta Part 1 62 



