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enlarged very robust blimtl}' pointed spinnles stand in a transverse oblique, 

 or longitudinal series (only one spinule in medium-sized and small speci- 

 mens). Between them and furrow series is a semicircular row of three or 

 fom- shorter, blunt, stout, papillifonn spinelets or sometimes very strongly 

 flattened spinelets ; these sometimes absent ; on outer part of x^late are 

 several smaller three or four-sided unequal clavate spinelets. Exclusive of 

 fuiTOw series there are al30ut fifteen to twenty-two spinides and spinelets to 

 each plate, the outermost ver}- irregular in distribution and on distal part 

 of ray showing a tendency to group themselves about the two or tlu'ee 

 larger spinules. 



" Mouth plates prominent actinally, with a bristhng armatm'e of robust, 

 shoii, untapered blunt spines disposed in a marginal and two actinal series. 

 Of the latter one stands on the border of the median sutm'e, while the 

 second, an intermediate shorter irregular series, is located between it and a 

 continuation of the marginal series on the edge adjacent to the first adam- 

 bulacral. Tliese spines are subquadrate, subterete, occasionally spatulate, and 

 are longer than on outer end of x^lates. They are also variable in number 

 according to age and locality. The true marginal series consists of about 

 seven rolmst spines in addition to a large median unpaired spine at the 

 inner angle of the combined plates. The three adjacent to inner angle are 

 usually graduated in size, then the next four are stouter and longer. This 

 is the plan of the fmTow series ; the spine counts vary. 



"Actinal interradial areas large, the intermediate plates extending to 

 the tenth to seventeenth inferomarginal, or one-fom*th to a little over one- 

 tliird length of ray measured along side from interradius ; j)lates arranged 

 in rows running from adambulacrals to inferomarginals. From inner side 

 these plates are oval and imbricate with all tlie sun-oimding plates. Plates 

 armed with unequal, sAvollen, more or less crowded gi-anules, those in centre 

 robust and clavate, often with slightly flaring tips bent outward, the peri- 

 j)heral smaller, round-tipped, occasionally subprismatic, very unequal and 

 in-egular, and radiating over naiTOw shallow gi'ooves between the plates. 

 These channels lead in an iiTegular coui-se from the inferomarginal fascioles 

 to those between the adambulacral plates. In some specimens they are 



