354 s. GOTO : 



specimen will reveal. The actual dlfifereuces are uot gi'eat, however, the 

 Jiiost striking being the form of the granules, the marginal pedicellarise, and 

 adambulacral armatiu'e. 



" Along with these specimens were taken one small and four large 

 examples of H. leiopeUa armata. Three specimens listed kurilensis are 

 possibly hybrids of this race and the typical form of Icurilensis. 



" The différences between leiopelta and kurilensis are at once apparent 

 on a comparison of figm'es. The latter has much higher pedicellarife, 

 heavily spined abactinals and marginals, marginal pedicellariae, and com- 

 pressed, rather spatidate fmTow spines, not stumpy conical ones. The naked 

 siu'face of the marginals in leiopeUa is also quite different from the condition 

 of kurilensis^ 



Neither the species nor the subspecies of this starfish is represented in 

 the collections mentioned at the outset. 



3Iediaster hrachiatus, n. sp, 



(PI. IX, figs. 142-152 ; PI. X, figs. 153-155.) 



This is a well defined species with long arms, of nearly the 

 same general form as in the already known species of this genus. 

 I have two specimens of different sizes, and the general appearance 

 of the two is somewhat conspicuously different. In the smaller speci- 

 men, which was originally preserved in formalin and has R=30 

 mm., the dermal armature is relatively finer than in the larger 

 specimen, in which R=56mm; the aboral side is also quite 

 inflated in the smaller specimen (Pi. IX, fig. 144, 145) ; but I take 

 this to be due to the action of formalin, which is known to 

 cause more or less swelling. But taking all points into considera- 

 tion there can be no doubt that the two specimens belong to the 

 same species. The area of the ventrolaterals is very spacious. 



