Asteriitlw fro)ii Kr/yncle/t's Islaiul. 109 



nata ; margines ventrales lateralcs sjjiuis brevibus compressis ad 

 apices truncatis,unasupraquamque tessellam(qu3e sulci slinoaribus 

 notatae) laciniati ; spintc ambulacrales biseriatas ; exteriores in- 

 terionim longitudinem diiplam a3quaiites, latae, ad apices (jnadrate 

 truncatfB, extra sulco parvo, aspectum ipsis duplicem praibentc, 

 insculpta) ; spinae interiores exterioribus porro longe breviorcs, 

 multo quoqiio gracib'ores ; tessella raadreporitbrmis rotundato- 

 ovalis, paulo propius a centro quam a raargine sita ; anus centralis, 

 papillis spinteformibus circiter 12 brevissimis circumdatus. Color 

 carneus vel sanguineus. 

 Diam. maxim. 90 millim., minim. 48, 



This species is rather closely related to the northern Porania 

 pulvillus of Miiller. From this, however, it may be distinguished 

 by the diiferent immber and character of the marginal s])ines ; 

 and also the ambulacral spines offer some distinctions : P. ind- 

 villus has three or four spines on each of the marginal plates 5 

 and these are much smaller than the single one found in the 

 ])resent species. The furrow on the exterior of the outer ambu- 

 lacral spines exists chiefly in the skin wliich clothes them. 

 The minute tubercles on the back do not disjjlay any regular 

 arrangement ; there are about a dozen on the central portion 

 of the disk, and a few on the short conical arms. 



Astrogonium meridionale^ sp. nov. 



Discus 5-radiatus, latitudine radiorum longitudinis ^ adajquaus, de- 

 pressus, superne infraque leviter convexus ; radii ad basim lati, 

 versus apicem aliquanto rapide attcnuati ; spinse ambulacrales 

 quadriseriatse, intimis ad apices quam basi latioribus, quadrateque 

 truncatis, coeteris longitudinis "a^qualis, simplicibus, cyliiadricis, ad 

 apices rotundatis ; anguli oris interradiales spina unica crassa 

 conica,et earn infra lacinia spinarum G-8parvarum intiis directarum 

 muniti ; radiorum et disci superficies inferior faseiculis spinarum 

 brevium aliquanto acuminatarum ornata, faseiculis in soriebus 

 a sulci s ambulacralibus usque ad margines radian tibus ; latera 

 seriebus duabus angustis spinarum in fasciculos parvos quadratos 

 confertos dispositarum (20 supra radium) marginata ; spina) 

 seriei inferioris iis superficiei infei'ioris similes, seriei superioris 

 lis dorsi ; superfcies dorsalis faseiculis numerosissimis fere con- 

 tiguis spinarum circiter 10-20 munita, spinis tubercularibus, ob- 

 tusis, pedunculatis ; interstitia inter spinarum fasciculos su[)ra et 

 infra uuda, pedicellarias numerosas magnas gerentia; radii tuber- 

 culo unieo magno superne terminati ; tessella madreporiformis 

 circularis, prope medium inter centrum et mai-ginem lateralem 

 sita ; anus subcentrahs. 



Disci diam. 24 millim., crass. 10 ; radiorum longit. 29. 



This sj^ecies belongs to that section of Aslnxjoainm which 

 includes A. jnixiUo.suiu as described by Gray, Proc. ZooL Hoc. 

 1847, p. 79, but it is not so flat either above or beneath. 



