ASTEEOIDEA Or H.M.S. ' OHALLEN&ER ' EXPEDITION. 259 



ing aratlaer large tabulum, on which 1-3 low granules are placed ; 

 and the smaller ones have about 8, with one central. The paxillse 

 are smaller and very compact in the centre of the disk, and a 

 prominent conical peak is present. 



The madreporiform body is transversely oval in form, and not 

 more than its own breadth, distant from the marginal plates. 



The terminal plate is large and broad, very deeply channelled 

 anteriorly, and with 2 or 3 short robust spinelets, which curve 

 slightly over the furrow. 



Colour, in alcohol, very light ochre-brown, almost verging 

 towards grey. 



Station 75. Lat. 38°37'N.,long. 28°30' W. Depth 450 fms. ; 

 sand. 



ASTROPECTEN PONTOPOR^FS, n. sp. 



Eays five. i2=3'5 r app. ; i2=53 millim., r=15 millim. Eays 

 rather broad throughout, and only sKghtly tapering until near 

 the extremity, which, although pointed, is rather obtuse. Breadth 

 of a ray at the base 16"5 millim. luterbrachial angles subacute, 

 or with a faint tendency to rounding. 



Supero-margiual plates 27 or 28 in number from tbe interbra- 

 chial angle to the tip, broader than long ; height about equal to 

 breadth at mid arm, but greater in the inner portion of the ray. 

 The plates are well rounded and tumid, which gives them a crested 

 or subtubercular appearance and clearly defines tbe separate 

 plates. The plates are covered with small papilliform granules, 

 which decrease in size towards the margins ; and each plate nor- 

 mally bears an elongate granule or aborted spinelet, situated 

 rather low down on the rounding between the dorsal and lateral 

 surfaces of the plate ; but not unfrequently two or three may 

 be present, and these stand in transverse line along the median 

 line of breadth. 



Infero-marginal plates broad, rather sharply rounded on to the 

 actinal surface, and do not protrude beyond the level of the 

 superior series. Marginal spines 4 or 5 in an oblique line, only 

 slightly inclined to the axis of the ray, passing from the adoral to 

 the aboral side of tbe plate. The spines are sbort, cylindrical, 

 tapering, and pointed ; the third or fourth from tbe adoral end 

 of the line is the longest, although there is no great disparity in 

 the length of any of them excepting tbe first, which is very small. 

 Two or three irregular rows, with the spinelets in each shorter 

 than those in the preceding row, stand behind the marginal 



