98 Mr. A. A 1 cock on 



]\rac1rc])oriform plate completely hidden. Amis central. 

 Colour in the fresh state pale yellowish pink. 

 Bay of Bengal, 1748 fathoms, Glohi<jeriiia-ooz.c. and 

 pun)iee. 



32. Paragonaster^ sp. 



Paragonast^r, sp., Aim. & ^lag- Nat. Hist., Dec. 1891, p. 43G. 



A specimen too much mutilated for description was taken 

 with the above; it is characterized by having the pa|)ulffi in 

 distinctly circumscribed papularia, over which the paxilhi; are 

 singularly large and prominent. 



Mediaster, Stinipson. 



33. 3fediaste7' roseus^ sp. n. 

 Mediaster, sp., Ann. & Mag. Nat. Hist., Jan. 1891, p. 1;3. 



Hays 5. 11 = 4 r. R = 42 niillini. in (he 

 type specimen. 



Disk small, tlat ; rays flat, tapering, rigid. 



Abactinal surface of the disk covered with ))a.\;Illiform 

 plates which in the centre and interradii are small, irregular 

 in shape, and crowded together, but which in the radial areas 

 are large and regularly hexagonal and arc arranged in 

 regular longitudinal parallel rows; the plates are surmounted 

 by large flat-topped hexagonal granules of unequal size, whicii 

 fit close together to form a mosaic for each separate [)late ; 

 abactinal surface of the rays formed principally by the 

 supero- marginal plates, which, however, are separated 

 throughout the ray by at least three rows of small irregularly 

 hexagonal paxilliform plates. 



Marginal plates massive, closely covered with hexagonal 

 flat-topped granules, and forming on both aspects a very 

 broad border to the disk and rays; they number thirty-live 

 in each series, and the two series correspond plate to plate ; 

 the infero-marginals of the interbrachia have a median 

 vertical series of distant pajjilliform spinelets or pedicellarite. 



The large adambulacral jdates have each a radiating 

 furrow-series of seven or eight flattened prismatic spinelets, 

 slightly decreasing in size in each series from the ends to the 

 middle, and actinally three unequal longitudinal series of 

 close prismatic granules. Mouth-[)lates narrow and elongate, 

 each with a furrow-series and a suture-series of coarse papilli- 

 form spinelets, which increase in size from periphery to 

 centre. 



