ECHINODERMS OF CONNECTICUT. 145 



Ayres, W. O. 1851-1854. 



Notices of Holothurise and other Echinoderms. Proc. Bost. 

 Soc. Nat. Hist., Vol iv. 



Although written more than a half-century ago, the descrip- 

 tions of the natural history of many of our native species 

 are as interesting as any that have been published since. 

 Bather, F. A., assisted by Gregory, J. W., and Goodrich, E. C. 

 1900. 



The Echinoderma. Lankester's Treatise on Zoology, Pt. iii. 



One of the most valuable works on the general anatomy, 



relationships, and natural history of the group. 

 Brooks, W. K. 



Handbook of Invertebrate Zoology. 



A well-known guide to the laboratory study of invertebrates. 

 Clark, H. L. 1899. 



The Synaptas of the New England Coast. Bull. U. S. Fish 

 Commission. 



A clearly written and well illustrated report on our two 



native species of Synapta. 

 Clark, H. L. 1901. 



Synopsis of North American Invertebrates. XV. The Holo- 

 thuroidea. American Naturalist, Vol. xxxv, 1901. 



A brief account of the anatomical peculiarities of the holo- 

 thurians, followed by analytical keys to the genera and 

 species found on both the Atlantic and Pacific coasts of 

 North America. 

 Clark, H. L. 1904. 



The Echinoderms of the Woods Hole Region. Bull. U. S. 

 Fish Commission for 1902. 



Concise systematic descriptions of nearly all the species of 

 echinoderms found in the waters of southern New Eng- 

 land. Each species is illustrated by excellent photo- 

 graphs, most of which were made from living animals. 

 Fewkes, J. W. 1887. 



On the Development of the Calcareous Plates of Amphiura. 

 Bull. Mus. Comp. Zool., Vol. xiii, No. 4. 



An important contribution to the embryology of the ophiu- 

 rans. 



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