34 Echin. 
XIV. ECHINODERMA. 
seen in the multiple madreporites of many Ecliinoderms ” ; 
Willey (255) p. 313. 
7. Coelom and other Body-cavities :—Vacant. 
8. Digestive System:—Vacant; but see b, 8. 
9. Nervous Systems:—Vacant. 
10. Mesodermal tissues (exc. Skeletal) :—Vacant. 
11. Axial organ or Ovoid gland :—Vacant. 
12. Genital System :—of Hoi. and Crin. contrasted with that of 
Ech., Ast., and Oph.; Russo (204), see under iv, a. 
b. HOLD TH ULUO IDE A. 
1, 2 & 3. Vacant. 
4' Skeletal tissue :—Spicules of Synapta roseola and 8. inhaerens, 
difference of size in different regions of body in S. inhaerens; 
Clark (57) pp. 23, 24, 26, pi. xi. 
5. Skeleton :—Calcareous ring of Synapta roseola and S. inhaerens ; 
Clark (57) p. 23, pi. xi. 
6. Hydrocoel &c. Respiratory Trees :—Respiratory trees of 
Holothuria and Stichopus ; Bordas (43). 
7. Coelom and other Body-cavities :—Ciliated funnels of 
Synapta roseola and S. inhaerens , size, distribution; Clark (57) 
p. 24, pi. xi. 
8. Digestive System : —Cuvierian organs homologous with 
stomachic caeca of Asteroids, their histology ; Russo (203). 
9. Nervous System:—“Otocysts” of Synapta roseola and 
S. inhaerens ; Clark (57) p. 28. 
10 & 11. Vacant. 
12. Genital System :—Anatomy and histology of generative 
organs of Hoi ., esp. Holothuria tuhulosa and H. impatiens ; 
Bordas (44). 
c. EC HI NOIDEA. 
1 — 3. Vacant. 
4- Skeletal tissue or Stereom :—Crystallography of plates 
of test of Echinocorys vulgaris, partially silicilied, and of spines 
of undetermined Echinoid, both from Senonian of Glons, 
Belgium ; Cesaro (54) p. 99. 
5. Skeleton :—Evolution of the following features in the test of 
Micraster in Upper Cretaceous time : interporiferous area of 
ambulacrum, general shape of ambulacrum, length, breadth, 
and height of test, elevation outline, rostrum and carina, 
apical system, anteal sulcus and ambital notch, position of 
mouth, labrurn, peristome, periplastronal area, sub-anal fasciole, 
and minor points ; Rowe (202). 
Ambulacra,—compared with those of Ast. and Mesocystis 
(p. 706), of PalceodisciLS (pp. 703, 705), of Echinocystis (p. 708 & 
figg. 12-14): Sollas (216).—Atrophy of pores in anterior 
ambulacrum of n. g. Lamhertia; Oppenheim (186). 
Buccal armature,—homologies discussed (p. 710), of Palceo- 
discus (pp. 703, 713), of Echinocystis (p. 707); Sollas (216). 
Periproctal plates of Discoides, figd. and distinguished as 
‘opercular,’ ‘valvular,’ ‘central,’ and ‘intermediate’ ; Lambert 
in Fortin (91) p. 21.—Number and distribution of genital 
pores in genera of exoeyclic Ech., especially Plesiospatangas ; 
Gauthier (102) p. 344, text-fig. 1. 
General anatomy of spines ; Uexkull (235) p. 74.—Pedicel- 
lariae described and figd.; Uexkull (234). 
6-12. Vacant. 
