A. JEJ. Yerrill — Hevision Genera a7id Species of Starfishes. 161 



T. mag7iifica (M. & Tr.), Ast., p. 53, pi. iv, figs. I, a, b, 1842. 

 Tasmania. 



7\ astrologorum M. & Tr., Ast., p. 54, Australia. A variet}-^ has 

 peclicellariae {t. Perrier). 



bb. — The actinal plates are usually entirely covered with granules. 



T. aurata Gray, Synop., p. il, pi. 16, fig. 2 {■= Astrogonium 

 anstralis M. & Tr., non Gray, t. Perrier). Australia. 



Peclicellariae size of granules on abactinal plates. 



T. grandis Gray, Synop., p. 11, pi. 3, fig. 1. West Australia. 



T. tubercidata (Gray). Port Natal. 



Section B. PUnthaster. — Peclicellariae .with narrow blades are pres- 

 ent, of small size, about equal to the grannies, or but little larger. 

 Adambulacral plates are wider, about as large as the actinal plates, 

 and bear many crowded spinules ; usually four to six in the furrow 

 series. Marginal and abactinal plates usually naked in the middle 

 and often areolated. Three to five of the dorsal marginal plates are 

 usually in contact medially. Atlantic. 



T. Perrieri (Sladen) = P. Perrieri Perrier, 1894, p. 391, pi. 25, 

 figs, la, lb. 



Off Morocco, 930 to 1590 meters. 



Pedicellariae occur on the abactinal and on both series of marginal 

 plates. They are set in special bilobed pits. Upper marginal and 

 abactinal plates are granulated only around the edges. 



T. compta Ver. West Indies, 683 fathoms. 



T. nitida Ver. West Indies, 335 fathoms. 



Section C. Ceramaster. — All the plates, above and below, are 

 usually granulated nearly or quite all over, unless rubbed ; in some 

 species the marginal plates may often have a small, naked, central 

 area. Adambulacral plates with four to six furrow spines. Atlantic. 



c. — Pedicellariae absent or not recorded. Only one or two dorsal 

 marginal plates are usually in contact medially. 



T. granularis (Retz.). Arctic Ocean and both coasts of the North 

 Atlantic, 20 to 750 fathoms. 



The variety Deplasi Per. (1894, p. 401) has some of the marginal 

 plates naked in the middle; the same occurs in some of our examples. 



T. simplex Ver., 1895, p. 135. Off Martha's Vineyard, 640 fathoms. 



The type of this species has a small naked spot in the middle of 

 the marginal plates, above and below. 



T. eximia Ver., 1894, p. 264. Off Nova Scotia, 80-122 fathoms. 



T. Greenei (Bell, 1889) ; 1892, p. 74, fig. Off Ireland, 1000 fathoms. 



T. placenta (M. & Tr.). Mediterranean, 40-50 fathoms. 

 T. mirabilis (Per.). Mediterranean. 



Trans. Conn. Acad., Vol. X. August, 1899. 



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