BY G. I. PLAYFAIR. liSo 



Collector. 



The only species really resembling this is St. Rosei mihi; but 

 compare also St. gracile Ralfs, ^ curtum Nord., C. Braz, T. 14, f.53, 

 which has no superior processes; and St. hihrachiatuin Rein. vai-. 

 cymatium West, Alg. Madag. T.8, f.28, which is only biradiate. 



St. cuniculosum, n.sp. (T.iv. f.l8). 



St. mediocre, ellipticum, latius (cum processibus) quam longum, 

 medio sinu acutangulo levissimeconstrictum. Semicellulae cam- 

 panulatae, basi angustissimo, lateribus usque ad medium semi- 

 cellulae verticalibus, parte superiore semicellulae utrinque in 

 processum producto, dorso late-rotundato leviter verrucoso (vel 

 denticulato), processibus assurgentibus. Semicellulae lateribus 

 glabris, margine processuum inferiore glabro, superiore autem 

 denticulato; a vertice triangulares, lateribus glabris valde con- 

 cavis, in era quemque marginem serie unica denticulationum, 

 apicibus 3-4-fidis. 



Lonjif. 48; lat. c. proc. ^bfx. 



Botany. 



Somewhat like .S'^. cytocerum Breb., in Ralfs, T,22, f.lO, in 

 which, however, the rays are twisted; and also like St. cerastes 

 Lund, Desm. Suec. p.69, T.4, f.6, but not nearly so verrucose. 

 In end view the sides are quite smooth, and there are only den- 

 ticulations down the processes. The apices of the piocesses also 

 have the usual 3-4 teeth. I have seen no four-rayed form. This 

 is not the same as St. approximatum West, Fr. Alg. Ceylon, T.22, 

 f.5, a more slender form which also occurs here. 



St. sexangulare (Bulnh.) Lund, Desm. Suec. p.Tl, T.4, f.9. 



Forma 5-radiata. Marginibus radiorum inferiorum 3-4 denti- 

 culatis. Omnia specimina a me visa immatura fuerunt radiis 

 superioribus nondum formatis. 



Long. s. rad. 34, 36,40, 51, 60; lat. c rad. 72,80, 81,96, 100/x. 



Collector; Botany. 



Forma 5-radiata immatura, n.f. (Tab. v. f. II). 



{St. stellinum Turn., Alg. E. Ind. p. 11 9, T.15, f.6). 



