MUSEUM OF COMPARATIVE ZOOLOGY. 25 



double concave outline near the middle of test. Color of test black ; spines 

 of same color mixed with spines of straw-color. — Society Islands. 



Echinoneus Van- Phel. 

 Echinoneus elegans Des. Monog. des Galerites. — Hayti. 



Echinocyamus Van Phel. 

 Echinocyamus angulosus Lkske, Addiment. ad Klein. Ech. — Norway. 



Fibularia Lamk. 

 Fibularia volva Ao. Cat. Rais. — Red Sea. 



Clypeaster Lamk. (emend.). — Echinanthus Gray (non Des.). 

 Clypeaster rosaceus Lamk. An. s. Vert. — Florida. 



Stolonoelypus Ac. 



Stolonoclypus placunarius Ag. 



Syx. Clypeaster placunarius Lamk. An. s. Vert. — Red Sea. 



Stolonoclypus prostratus Ag. 



Syx. Clypeaster prostratus Rav. Cat. Echin. So. Car. — Florida. 



Stolonoclypus rotundus A. Ag. 



Closely allied to S. prostratus, from which it differs by its almost circular 

 outline, its thin edge, the great size of the ambulacral rosette, and width 

 of the ambulacral system. — Acapulco. 



Rhaphidoclypus A. Ag. 



Rhaphidoclypus scutiformis A. Ag. 



Syx. Clypeaster scutiformis Lamk. An. s. Vert. — Red Sea. 



Rhaphidoclypus microtuberculatus A. Ao. 



Differs from R. scutiformis by its elongated ambulacral rosette, and the- 

 great number and small size of the closely crowded tubercles. — Kingsmills 

 Islands. 



Rumphia Des. Synop. Echin. Foss. — Polyaster Mien. Guer. Rev. de 

 Zool. 1859. — Michelinia Dcj. et Hupe, Ech.'n. 



Rumphia Lesueuri A. Ac 



Syx. Laganum Lesueuri Ac. Cat. Rais.; Polyaster elegans Mien. Guer. 

 Rev. de Zool. ; Michelinia elegans Duj. et Hupe. 



This species is mentioned by Professor Agassiz as coming from Guade 

 loupe ; this is probably a mistake. There are no specimens of his L. Lp 

 sueuri in the Museum, and the present species is identified with the figures 

 in his Monog. des Seutelles. It is undoubtedly the Polyaster elegans of 

 Miehelin. — Hong-Kong. 

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