Spong. 1 
XVII. SPONGLE. 
BY 
Professor E. A. Minchin. 
CONTENTS. 
Page 
Introduction 3 
I. Titles. ... 5 
II. Biology . 9 
A. Evolution ..... . . . . . 9 
b. Morphology 10 
(i) General Accounts 10 
. (ii) External .Characters 10 
(iii) Anatomy of Soft Parts. Canal-System . . 10 
(iv) . Skeletal System 10 
(a) General Accounts (vacant). 
(b) Material of the Skeleton (vacant). 
(c) Skeletal Elements, Morphology, Develop- 
ment, and Nomenclature of . . . 10 
(d) Skeletal Anatomy 10 
. (v) Histology 10 
(a) General Accounts 10 
(b) Special Organs or Tissues ... 10 
c. Physiology. . . 11 
(i) General Accounts (vacant). 
(ii) Nutrition 11 
(iii) Respiration 11 
(iv) , Secretion and Excretion, Pigments, Ferments, etc. 11 
(v) Irritability, Contractility, etc 11 
D. Bionomics (vacant). 
E. Reproduction, Development and Growth . . . 11 
(i) Germ-Cells, Fertilization 11 
(ii) ' Embryology II 
(a) General Accounts (vacant). 
(b) Early Stages, Larva?, and Metamorphosis 11 
(c) Post-Larval Development, Organogeny 
(vacant). 
