1867.] TATE — SOUTH-AFEICAN POSSILS. 163 



Serptjla (Yeemilia) Pii^-CHrN^iAK-A, spec. Fiov. PL IX. figs. 10 a, 10 &, 1 c. 

 " Ser^ula, sp. Large single tube" (Sharpe, Geol. Trans. ?.c.p.202). 



Tube round, partly attached by a slightly expanded suiface ; 

 rampant ; free portion straight ; surface with transverse irregular pli- 

 cations. The outer diameter of the free portion equals 84 millims. 



The unattached portion resembles the same part of the tube of 

 Seij)ula quadristriata, and of S. voluhilis of the Oolites ; but in 

 each of these the fixed part is convoluted. It has close afiinity to 

 Vei'miUa awpuTlacea and V. antiquata of the Cretaceous rocks, but 

 differs from the former in being very perfectly round, and from the 

 latter by the absence of annular rings. 



Loc. On Trlgonia Serzogii, Sunday's Eiver {Bain and AtJier- 

 stone) ; Sunday's Eiver Mouth {Euhidge). 



Serpula eilaeia, Goldfuss. 

 Sunday's Eiver {Bubidge). 



Seepula plicatilis, Goldfuss. 

 Sunday's Eiver {Bain). 



Cidaeis pfstulieeea, spec. nov. PI. YIII. figs. 9 a, 9 h. 



The materials at my disposal, illustrative of this species^ are 

 many interambulacral plates, some with portions of the ambulacral 

 areas, exhibiting the poriferous zones, and numerous primary spines. 



The amhidacral areas are narrow, with two rows of small granules ; 

 poriferous zones narrow, pores circular, and the septum between the 

 pores forming an elevated moniliform Hne. 



Interamhidacral plate (fig. 9 5) large and thick ; boss prominent, 

 and its summit smooth ; the areola is elliptical, around the margin 

 of which are a great number of closely set, imbricating, scrobicular 

 granules, which diminish in size towards the edge of the plate. 

 Interambulacral polar plates (fig. 9 a) thin, the areolas circular. 



Primary spines cylindrical ; margin of acetabulum smooth ; head 

 of spine with a prominent finely crenulated ridge ; stem of spine 

 cyKndrical, covered with granules or spiny tubercles having a linear 

 arrangement. 



Loc. Saltpans near Uitenhage {Euhidge'). 



The species described above belongs to that type of the genus 

 characterized by the smooth and uncrenulated bosses of the tuber- 

 cles ; species of this type exist at the present time, and are found 

 in Tertiary and Cretaceous rocks; species of the type with cre- 

 nulated bosses characterize Oolitic deposits. There are, however, 

 some exceptions to these rules; and for the present the African 

 species maybe regarded as another exceptional example. 



Pucoedes clavatus, spec. nov. 



" Fucoid? ", &c., Sharpe, op. cit. p. 202. 



Prond cyKndrical, dichotomous; branches one inch in lengthy 

 nearly equal, clavate. 



Loc, In grey sandy limestone, Sunday's Eiver. 



