TABLE OF CONTENTS. 



Page. 



I. INTRODUCTION 11 



II. METHODS 11 



1. Soft parts 11 



2. Skeleton 12 



3. Spicules 12 



4. Graphic representation 13 



5. Measuring 13 



6. Biometry 16 



7. Nomenclature of the spicules 17 



III. DESCRIPTION OF THE SPECIES COLLECTED BY THE ALBATROSS . 19 



Hexactinellida 19 



Hexasterophora 19 



Edplectellidab 20 



Edplectellinae 20 



Holascus 20 



H. edwardsii (Plate 18, figs. 15-26; Plate 19, figs. 1-24; Plate 20, figs. 1-20) 21 



Holascella 29 



H. taraxacum (Plate 21, figs. 1-13; Plate 22, figs. 1-41; Plate 23, figs. 1-3) 29 



H. ancorata (Plate 23, figs. 4-25; Plate 24, figs. 1-9) .... 37 



H. euonyx (Plate 24, figs. 10-17; Plate 25, figs. 1-24) .... 44 



Caolophacidae 47 



Caulophacus 47 



C. schulzei (Plate 7, figs. 20-31; Plate 8, figs. 1-29; Plate 9, figs. 1-33; 



Plate 10, figs. 1-29; Plate 11, figs. 1-17) ... 48 



Caolophacella 64 



C. tenuis (Plate 12, figs. 1-19) 64 



Calycosilva 67 



C. cantharellus helLx (Plate 1, figs. 1-8, 20-24; Plate 2, figs. 3, 7-13, 15; 

 Plate 3, figs. 1-5, 8-30; Plate 4, figs. 23, 24; Plate 5, 

 figs. 1, 2, 4, 5, 7-9, 11-15, 18-20; Plate 6, figs. 5-21, 24- 



34; Plate 7, figs. 1-10, 12-14, 16, 17) ... 67 

 C. cantharellus simplex (Plate 1, figs. 9-19, 25-29; Plate 2, figs. 1, 2, 4-6, 14, 

 16; PlateS, figs. 6, 7; Plate 4, figs. 21, 22; Plate 5, figs. 

 3,6,10,16,17; Plate 6, figs. 1-4, 22, 23; Plate 7, 



figs. 11, 15, IS) 68 



C. cantharellus megonychia (Plate 4, figs. 1-20; Plate 5, fig. 21; Plate 7, 



fig. 19) 68 



Doubtful caulophacid (Plate 32, figs. 10-12) 92 



rossellidae .............. 93 



Rossellinae ............. 93 



Bathydorus 94 



B. laevis 94 



B. laevis spinosissimus (Plate 14, figs. 1-32; Plate 15, figs. 1-22; Plate 16, 



figs. 1-24) 94 



Landginellinae 103 



Lanugonychia 103 



L. flabellum (Plate 12, figs. 20-34; Plate 13, figs. 1-28) .... 103 



Acanthascinae . 112 



