The Echinoderm Fauna of Month Africa. 263 



the upper .series exactly except that the bare area is smaller, while 

 in form they are perfect complements of the adjoining superomarginals 

 Actinolateral plates numerous and crowded, arranged in about eight 

 series parallel to the adambulacrals ; first series extends from oral 

 plates to sixth inferomarginal and is made up of about 21 plates, 

 which, excepting 2 or 3 at each end, are distinctly wider than long; 

 succeeding series very crowded and hard to distinguish, the component 

 plates about square; all the plates are covered by a close granulation 

 like that on the iriferomarginals but becoming coarser on the series 

 near the adambulacrals. 



Adambulacral plates about 33 in each series, not much wider than 

 long (if any) and not specially crowded. Each plate carries a series of 

 i or 5 stout spines on the furrow margin ; these spines are about a milli- 

 meter long, blunt and thickened at tip, more or less compressed ; when 

 4 are present, the middle pair are a trifle longer than the others; if a 

 fifth spine occurs it is proximal in position and much smaller than the 

 others; back of this marginal series, there are, on the oral surface 

 of each plate, parallel with the furrow, three series of spinelets, of 

 which two have three spinelets each and the outermost usually has 

 four; the outermost series is no larger than the adjoining granules 

 of the actinolateral plates, while the other series are slightly more 

 spine-like; near the mouth, the outer series merges with the third 

 or disappears altogether; distally the number of spinelets in each 

 series is reduced. Just beyond the middle of the ray the distal 

 spinelet of the second series is somewhat larger than its fellows : 

 this disproportion increases as the tip of the ray is approached and 

 the number of spinelets decreases, until, on the last ten or a dozen 

 adambulacral plates, this spinelet is a conspicuous subambulacral spine, 

 about a millimeter long and half a millimeter thick. Oral plates not 

 at all swollen ; on the free margin is a series of 9 stout, prismatic 

 spines, the innermost stoutest; parallel to the sutural line between 

 the two plates is a series of 8 crowded spinelets, of which the distal 

 ones are scarcely larger than the granules of the adjoining actino- 

 lateral plates; a secondary series of 6 smaller spinelets runs irregularly 

 parallel to this sutural series and there are 2 additional spinelets 

 between it and the marginal series. There seem to be no pedicellariae. 

 Colour of dried specimen, dingy brownish-yellow. 



P.F. 15366. Cape Point N. 16 E., 10 miles, 85 fms. Gm. m. 

 1 specimen; adult, 



Holotype, South African Museum, no. A 6413. 



This handsome goniasterid is very near patagonicus of the same 

 size from Alaska. Dr. Fisher has kindly compared them and finds 



