JOURNAL OF ENTOMOLOGY AND ZOOLOGY 65 



large, somewhat swollen plates, 80 to 100 in number, counting 

 the small ones, but excepting the central portion of 12-15 of the 

 largest, these are all concealed by a fairly uniform coat of granules, 

 about 50-75 per sq. mm. No radial shields can be distinguished. 

 The coat of granules extends along the upper surface of the arm to 

 the very tip and covers also most of the surface of the basal side 

 arm plates ; many of the upper arm plates are bare at the center, but 

 others are completely hidden. Interbrachial areas below covered 

 by a uniform coat of granules which extends clear to the very jaw 

 tips, completely concealing the oral shields (except the madreporite, 

 which is largely bare), the adoral and the oral plates. Oral papil- 

 lae, 10-12 on each side, large and thick, not at all, except the distal- 

 most, squamiform. Those near the tip of the jaw and the penulti- 

 mate are the largest, while the middle ones are somewhat smaller; 

 they are roundish and blunt, twice as long as thick. First under 

 arm plate small, triangular; succeeding plates longer than wide, 

 basal ones in contact, much wider distally than proximally and with 

 distal margin strongly convex and a little swollen; they are some- 

 what hexagonal, but the three proximal sides are very short, while 

 the distal lateral sides are long and concave. Side arm plates mod- 

 erately large and projecting; each carries a series of five short, 

 thick, almost conical, subequal spines, scarcely half as long as a 

 joint; the spine-ridge is near the middle of the plate and the spines 

 stand more or less straight out from it. Tentacle scales two, very 

 large and scale-like; on the terminal joints there is only a single 

 scale. Color (dried) dirty whitish, brightest orally; disk spotted 

 with minute brownish-red spots, widely and Irregularly spaced. A 

 smaller specimen, preserved in formalin, has the upper surface of 

 the arms quite pink or rose-colored and the spots on the disk are 

 distinctly red. 



This very remarkable brittle star was sent to me by Professor 

 W. A. Hilton, who discovered It among kelp "holdfasts" at Laguna 

 Beach, California, July 24, 1914. The holotype is In the collection 

 of the Museum of Comparative Zoology, Cambridge, Mass. (Cat. 

 No. 3914), while a paratype remains with Professor Hilton. The 

 resemblance to the Bahamas species, referred to above, Is particu- 

 larly marked In the oral view but in macidosus the madreporite is 



