48 NATURAL HISTORY BULLETIN 



of their actinal surface is covered with smaller, short, obtuse 

 spicules, resembling granules. 



Perrier recorded this species from the Blake Expedition from 

 off West Florida,^^ in 101 fathoms, and off Barbados in 150 

 fathoms. I have seen it, also, from Blake station 297, in 123 

 fathoms, off Barbados. The Bahama Expedition dredged it off 

 Havana, in about 200 fathoms. 



This may be only a variety or form of H. antillarum. Such 

 differences as have been noticed may be due to the variations 

 caused by autotomous division. The possession of six rays can- 

 not be regarded as a specific character, especially in autotomous 

 species. 



Henricia microspina Verrill, sp. nov. 



A small species with a small disk and five very slender terete 

 rays. Radii of the type 4.5"^™ and 23"^" ; ratio, 1 :5.1. 



The dorsal surface is evenly covered with very small irregular 

 plates many of them roundish, forming a finely but rather 

 evenly riticulated structure, in which the plates and ossicles are 

 narrower than the sunken papular areas between them. The 

 papulae are mostly solitary. The madreporic plate is small, 

 somewhat raised, nearly destitute of spinules. 



The spinules are remarkable small and thin, almost micro- 

 scopic in size, very slender and short. They are rather nu- 

 merous on the larger plates, but are not crowded, partly owing 

 to their thinness. 



Plates of both marginal rows are very distinct, transversely 

 oblong, nearly equal, and covered with numerous very minute, 

 spaced spinules like those of the dorsals but a trifle larger. The 

 two rows are separated only by a narrow naked groove distally, 

 but at the base of the rays a few intermarginal plates lie between 

 them. 



The interactinal plates form a single regular row. They are 

 squarish, about half as large as the marginals, and spinulated in 

 the same way. There is a simple row of minute papular pores 

 each side of the interactinal row of plates. 



10 Perrier gives this station erroneously as No. 47. It should be No. 45. 

 He also errs in giving the longitude as 33° 21' East. It should read 83° 21' 

 East. It is in N. lat. 25° 33', Northwest of Dry Tortugas. 



