A. E. Verrill — Revision Genera and Species of Starfishes. 1*73 



Bivalve pedicellarise, with wide blades, occur on some of them, as 

 well as on the adambulacral and actinal plates. 



Adambulacral plates are covered with actinal granules in longi- 

 tudinal rows ; there are six or more prismatic spinules in a regular 

 furrow-series. Actinal plates are granulated and extend to near end 

 of rays. 



This genus is related to Peltaster, but differs in having the abac- 

 tinal plates all small and similar, and also naked centrally, and in 

 having the marginal plates mostly naked, except around the margin. 

 The large bivalve pedicellarise are similar in the two genera. The 

 character of the pedicellarife differentiates the genus from Tosia and 

 its closer allies. 



Eugoniaster investigatoris (Alcock). 



Pentagonaster investigatoris Alcoc'k, Ann. and Mag. Nat. Hist., xi, p. 88, 1893. 



This large species has, on the abactinal sui'face, " uniformly small 

 round tabular plates, which are distinctly isolated from one another 

 and are fringed with a single row of flat squamous, membrane-clad 

 granules flush with the general surface, but are otherwise naked, 

 except that some of the plates (perhaps one-fourth) bear a very 

 excentric or quite marginal, broadly bilobed pedicellaria." 



The marginal plates are also bordered with squamous granules and 

 bear bilobed pedicellarise ; some also have a central group of granules. 



Bivalve pedicellarise also occur on the adambulacral plates and 

 broad ones on the actinal plates near the jaws. 



Adambulacral plates bear crowded, graded actinal granules in two 

 or three longitudinal rows, and a furrow-series of six or seven prism- 

 shaped spinules. 



Antheniaster, gen. nov. Type, A. sar-issa (Alcock, sp.). 



This genus resembles Anthenoides Per. in having a thin, finely 

 granulous membrane over the abactinal surface of the plates, but it 

 differs so much in other respects that it cannot properly be referred 

 to the same genus. The pedicellarise are papilliform or spoon- 

 shaped ; not large and bivalvular as in the latter. 



It has two kinds of abactinal plates, which is not the case in 

 Anthenoides. The larger plates are " stellate or somewhat poly- 

 gonal," arranged in radial rows ; the small secondary plates are 

 " inlaid everywhere between the large plates." Papular pores exist 

 on large radial areas. Marginal plates are large and partly granu- 

 lated ; the dorsal distal plates are in contaqf medially and mostly 

 naked. 



