62 NATURAL HISTORY BULLETIN 



Between all the larger plates are a few small rounded plates, 

 either solitary or in small groups, and often bearing a single 

 bivalved pedicellaria. 



On the dorsal interradial areas, beyond the papulae, the plates 

 are smaller, closely imbricated, subtriangular or pelecoidal, thick- 

 ened, usually with a solitary small ossicle between their angles. 



Enoplopatiria marginata (Hupe) Yerrill. 



Asteriscus marginatus Hupe, Voyag. Oastelneau, Zool., iii, p. 100, 1857. 



Perrier, Pedicel!., p. 97, 1869. 

 Asteriscus 'braziliensis Liitken, op. cit., 1859, p. 57. 



Asteriscus stellifer Mobius, Hamburgur Abhand. Geb. Natur., iv, 1859. 

 Verrill, Trans. Conn. Acad., i, p. 343, 1867. 



Asteriscus minutus (pars) M. and Tr., System Aster., p. 41, 1842. (non L., 

 non Grmel., nec Gray, etc.) 



Enoplopatiria marginata Verrill, Eevis. Asterinin^e, p. 480, 1813; Star- 

 fishes N. Pacific, p. 263, 1914a. 



Plate vii ; figure 2. Brazil. 



Depressed, stellate, with short, rather obtuse rays, and rather 

 evenly incurved interradial margins. Becomes 65™™ or more in 

 diameter. Larger dorsal plates rather conspicuous with thick- 

 ened exposed portions, mostly broad crescent shaped. The larger 

 ones bear a curved single or double row of about six to twelve 

 spinules, not covering the whole surface, and usually several 

 forked pedicellariag, with a large rounded basal piece, nearly as 

 thick as the spinules. A similar pedicellaria is usually borne on 

 each of the small interpolated plates. 



Small specimens, up to 70™™ in diameter, usually have a dis- 

 tinct median dorsal row of subrhombic or shield-shaped plates, 

 flanked on each side by a row of obliquely placed plates of sim- 

 ilar size, but less symmetrical. Larger specimens usually show 

 the median row of plates proximally, but on the distal third or 

 half of the ray the dorsal rows of plates become confused and 

 crowded irregularly. 



The plates of the dorsal interradial areas are regularly im- 

 bricated in alternating rows, becoming thicker proximally, and 

 often have a small central boss. They bear a group of small 

 divergent spinules. 



The ventral or interactinal plates are regularly arranged in 



