19 Echin. 
General and Structure. 1003, 1007 
STRUCTURE. 1007 
(a~h refer to the Classes, as under 1031). 
a. General. 
2. Symmetries. 
Metamerism and polymerism in 
relation to life of Echinoderms ; Leh- 
mann. 
10. Mesodermal tissues exc. skeletal. 
Connective tissue, pigment, and 
general integument of Uolothuria ; 
Polara, 2. 
Integument, esp. sclerohlasts, Cucu- 
maria ; Woodland. 
11 and 12. Vacant. 
b. Holothurioidea. 
1. General. 
Anatomy. Uolothuria nigra (561-567, 
figs.) and general Iiol. ; MacBride, 2. 
Inner anatomy <S ynapta minuta adult 
and young ; Becher, (507). 
Pelagobhuria ; Herouard, 3. 
2 and 3. Vacant. 
4. Skeletal tissue. 
Spicules of Cueumaria, Tliyone ; 
Woodland, (pi.). 
Spicules Synapta minuta, Labidoplax ; 
Becher, (506). 
c. Echinoidea. 
1. General anatomy. 
Echinus esculentus (504-529, figs.), 
and general Ech. ; MacBride, 2. 
Macroscopic and microscopic anat. 
of skeleton and internal organs of 
Phormosoma, Hygrosoma, and Spero- 
soma, comparison with Asthenosoma ; 
Schurig. 
2. Symmetries. 
Proposed new notation for genital 
plates ; Stfguin, 1, 2. 
Notation of rays, Loven’s method 
preferred to S^guin’s ; Lambert, 4. 
3 and 4. Vacant. 
6 and 6. Vacant. 
7. Other body- cavities and their con- 
tents. 
Contractile rosettes in body-cavity, 
Synapta, Rhabdomolgus ; Becher, (508). 
Brown bodies of Hoi., contents, 
pigment; Briot, 1. 
8. Vacant. 
9. Nervous system and sense-organs. 
Central nervous system, Synapta ; 
Bochenek. 
Cutaneous nerves and sense-cells of 
Uolothuria ; Polara, 2. 
Russo’s corpuscles and podia modified 
as sense-organs, Uolothuria ; Polara, 3. 
Sense-cells, distrib. in tegument, 
Mesothuria, Cueumaria, Synapta ; Ret- 
zius, (figs.). 
(n-9720 m) 
5. Skeletal anatomy. 
Test, Phormosoma, Hygrosoma, Spero- 
soma ; Schurig, (308). 
Ambulacra, pore- groupings, compound 
plates ; Valette, 2. 
Floscelle and phyllodes, definition, 
origin; Lambert, 4, (29). 
Radioles, esp. poisonous, histology ; 
sphaeridia ; pedicellariae, in Eehino- 
thuridae ; Schurig, (300-300). 
Pedicellariae, structure, differences, 
distribution, taxonomic value ; Doeder- 
lein, 2, (65-81, 90, et passim). 
Pedicellariae, number, attachment, 
Paracentrotas, Arbacia, Sphaer echinus, 
Spatangus ; Henri & Kayalof. 
6. Hydrocoel and appendages, Res- 
piratory organs. 
Podia, Phormosoma, Hygrosoma, no 
suckers, no mouth-tentacles ; Schurig, 
(306). 
b 8—2 
