2 Echin. 
XIV. ECHINODERMA. 
Page 
iii Secondary Sexual Characters :— 
a. Differences of Form or Structure . . 43 
b. Differences of colour ..... 43 
c. Protection of young ..... 43 
c. Physiology :— 
i General ........ 43 
ii Circulation ..43 
iii Respiration ........ 43 
iv Alimentation and Digestion .... 43 
v Excretion and its Products . . . 43 
vi Sensation ........ 43 
vii Miscellanea and Experimental .... 43 
D. Bionomics :— 
i General Accounts ...... 44 
ii Special habits ....... 44 
iii Habitat (in Classes a—li, as under IV) . . 44 
iv Feeding (ditto) (ditto) . 44 
v Defence and Protection, (a. Active, b. Con¬ 
cealment. c. Protective coloration, d. Other 
protective adaptations) .... 44 
vi Locomotion ....... 45 
vii Autotomy and Regeneration .... 45 
viii Parasites and Commensals (in Classes a—h, as 
under IV) ....... 45 
ix Echinoderms as Food.46 
x Echinoderms as Geological Agents ... 46 
e. Miscellaneous :— 
i Research and Instruction (a. Preservation, b. 
Methods of research, c. Museum exhibits 
and Collections. d. Instruction) . . 46 
ii Economics . 47 
iii Bibliography.47 
iv Historical, Popular notions, &c. ... 47 
f. Auxology : — 
i General principles ...... 47 
ii General accounts.47 
iii Formation of Gonads.47 
iv Oviposition, Fertilisation, Segmentation . . 47 
v Larval stages.48 
vi Organogeny, 1-12, as under II, b, i . . . 48 
vii Post-larval growth-stages ..... 48 
viii Developmental mechanics and Experimental 
Embryology ....... 49 
(Under each of the above a—h indicate Classes as 
under IV.) 
III.—Distribution. 
a. Geographical :— 
i General ........ 50 
ii Atlantic Ocean and adjacent Seas ... 51 
iii Indian Ocean and adjacent Seas . . . 51 
iv Pacific Ocean and adjacent Seas ... 52 
v Arctic Ocean and adjacent Seas ... 52 
vi Antarctic Ocean and adjacent Seas ... 53 
