VI 
Contents 
Part III. 
Plate I. Colour Variation in the Young of Holothuria 
Jloridana, Pourtales . . . . .to face p. 300 
•Plate II. Colour Variation in the Adult of Holothiiria 
jloridana, Pourtales ..... „ 300 
Plates III. — V. Papilla, pedicel, and calcareous spicules of Holo- 
thuria Jloridana, Pourtales .... „ 300 
Folding Plate. Holothuria Jloridana, Pourtales .... „ 241 
Part IV. 
Photographs of Negro and White Crosses 
350 
Special Supplement to Vol. VI. 
Pigmentation Survey of School Children in Scotland. Appendix 
to Report. By J. F. Tocher . . (Separate pagination) pp. 1 — 67 
Erratum. 
On p. 119, line 19, /or "Since log .-i^e-^ = -848,4081," 
o^ead "Since log .r^^e"^ = 3 526,3058." 
