ECHINODERMA. 



On the number of rays 



Bermuda. 



Amer. Natural. Vol. XL— IX Jan. 1915. H. 



Davenport, G. C. 59.39. 



Variation in the Madreporic Body and Stone of Canal of 



Asterias vulgaris. 



Science N. S. Vol. XIII. 1901. 



Edwards, Ch. L. 59.39. 



Variation, Developement and Growth in Holothuria floridana 



Pourtales. 



Biom. Vol. VI. 1908-1909. S. 



Mac Intosh D. C. 59.39. 



Meristic variation in the Common Sun Star, Solaster papposus. 



Proc. Roy. Phys. Soc. Edinburgh Vol. 17. 1907. 



Tennent, D. H. 59.39. 



Variation in Echinoid plutei. 

 Journ. Exp. Zool. Vol. IX p. 657—714 Taf. 8. 1910. 

 Tennent, D. H. 59.39. 



The Dominence of Maternal or of Paternal Characters in 

 Echinoderm Hybrids. 



Arch. f. Entwicklungsni. Bd. XXIV. Leipzig 1910. 

 Tennent, D. H. 59.39. 



The correlation between Chromosomes and particular Characters 

 in Hybrid Echinoid larvae. 

 Amer. Natural. 1912. H. 

 Walter, H. E. 59.39. 



Variations in Urosalpinx. 

 Amer. Nat. Vol. XLIV p. 577—594 3 Fig. 12 Taf. 1910. H. 



