94 VERRILL 



and more tapering. The characters of the adoral carina and oral 

 spines are also peculiar. 



VARIATIONS. 



A very large dry specimen of this species has been sent to me by 

 Dr. C. F. Newcombe from the Provincial Museum of British 

 Columbia. It was dredged in ten fathoms, off Victoria, 1894. 



Its radii are 64 mm. and 330 mm. ; ratio, i : 5.14. 



The disk is distorted in drying and is probably larger than the 

 normal size. The rays are thick at base, but taper to long and 

 relatively slender tips. The dorsal surface is covered with a thick 

 integument, dark reddish brown in the dry specimen, and has but few 

 distant spines. But numerous large, stout, thick, unguiculate pedi- 

 cellariae are scattered over the surface, which is also covered with 

 small minor pedicellariae, thickly scattered over nearly the whole 

 surface and also forming wreaths around the bases of the spines. 

 Probably a large part of these may have been rubbed off by repeated 

 dustings, for the specimen has evidently been exposed to dust and 

 mold; and owing to its great size, it probably was not very well 

 preserved originally. Hence it is probable that the dermal minor 

 pedicellariae originally existed in still larger clusters, as they do in 

 depressed spots, where the coating of dust and mold has not been 

 removed, especially distally. But as numerous large major pedi- 

 cellariae are still scattered over the surface, it is evident that no 

 severe cleansing has taken place, sufficient to remove all those on 

 the spines. 



The dorsal skeleton is coarsely and irregularly reticulated, but 

 the ossicles are concealed by the thick integument. 



The spines are mostly conical and acute or subacute, about 1.5 mm. 

 to 2.5 mm. long, with but few smaller ones. They form distinct but 

 incomplete simple radial rows, in which they usually stand 2 mm. to 

 5 mm. apart, where continuous. A very few similar spines are 

 irregularly scattered over the disk and rays. The madreporic plate 

 is large, with fine gyri, its diameter is 13 mm. 



The superodorsal plates are well down on the sides of the rays. 

 They are relatively small and not very distinct, and bear a simple 

 row of spines, rather larger than the dorsals, many of them blunt 

 with grooved tips. They are close to the inferomarginals, except 

 in the interradial areas, where they diverge a little, leaving a spine- 

 less area. 



The ventral spines proximally consist of four or five rows close 

 together and nearly equal. They are short (3 mm. to 4 mm. long), 



