21 Echin. Structure and Physiology. 1007. 1011 
5. Skeletal anatomy. 
Tegmen of Onychocrinus, migration of 
radianal in Iclitliyocrinidae, IBB of 
Calpiocr., IBr of Flexibilia , anal area of 
Flexibilia and perisomic plates generally ; 
Springer. 
6. Vacant. 
7. Other body-cavities and their con- 
tents. 
Coelom, general account ; Hamann 
(1495). 
8. Digestive system. 
Gut, general account ; Hamann (1502). 
9 and 10. Vacant. 
11. Axial organ. 
General account ; Hamann (1496) 
12. Generative organs and gonads. 
General account; Hamann (1505). 
Ovary Anledon (450), so-called “yolk- 
cells” (451), oogonia (451), oocyte (452- 
492) ; Chubb, 2. 
g. Cystidea. 
5. Skeletal anatomy. 
Pores in test of Aristocystis ; Bather, 
4, (10). 
h. Blastoidea. 
1. Skeletal anatomy. 
Oral septa in Penlremites ; Smith 
(1235, pi. 47). 
PHYSIOLOGY. 1011 
1. General. 
Cell-metabolism, oocyte of Antedon; 
Chubb, 2. 
2. Circulation. 
Vacant. 
3. Respiration. 
Forced respiration by movement of 
radial plates, Ophiothrix ; MacBride, 1. 
4. Alimentation and Digestion. 
Vacant; but see 1019, 4. 
5. Excretion and Secretion. 
Mucus secreted on irritation of skin 
differs in II. poll from II. tubulosa : Pig- 
ment in skin of Holothuria, uranidine ; 
Briot, 2. 
Action of poison radioles in Echino- 
thuridae; Schurig (301). 
Skin glands, Echinaster, Cribrella ; 
Barthels. 
6. Sensation. 
Cutaneous epithelium and pigment 
cells as a diffused sense-organ for per- 
ception of light, Holothuria. Polara 2 : 
cf. Polara, 3. 
7. Miscellanea and Experimental. 
Action of light on motion of Asterias ; 
Bohn. 
Action of temperature on development 
of Ech. ; Marcus. 
Geotropism of larvae, see 1015, 5, c. ; 
Lyon, 2. 
Movements of pedicellariae ; Henri 
& Kayalof. 
Phagocytosis by amoebocytos of 
perivisceral fluid in Paracentrotus and 
Sphaerechinus ; Cemovodeanu & Henri. 
Perivisceral fluid of Spatangoids, by 
coagulating, forms patches to mend small, 
punctures in tube of intestine ; Henri : 
Also stops small holes in test, in Echinus , 
Parechinus, Paracentrotus ; Cu4not. 
Green fluorescence in alcohol extract 
of Holothuria integument ; Dubois. 
Function of Stewart’s organs in 
Echinothuridae ; Schurig. 
