ÖPVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1895, N:0 1>. ()27 



Fig. I, «. cujus diameter disci super at longitudinem ipsius 

 corallii', Stella vero plauhtscula margine instruitur latissimo, 

 centro parum excavato, raddis e medio cavitatis ad circumferen- 

 tiam ductis integris omnihus. 



In the subsequent editions of Amoen. x\cad. nothing is 

 added, and in Ed. X of Syst. Nat. p. 793 all the varieties 

 are called Madrepora turbinata. This species occurs also in 

 Fauna Suecia p. 536. In S. N., ed. XII, p. 1272, the de- 

 scription is thus far altered that it stånds »Stella haemisphserico- 

 concava». 



The description coincides so exactly with Ptychophyllum pa- 

 tellatum ScHLOTH., that, in my opinion it is evident, this species 

 has been intended. The figure, however, is not so exact as those 

 formerly given by Bromell;') but it cannot be applied to any 

 other Gotland fossil. 



Var. ß. Fig. II, the long description together with the 

 figure point to the common rugose coral, for which exclusively 

 M. Edwards & Haime''^) have kept the Linnean name turbi- 

 natum, placing it in Rafinesque's genus Omphyma. M. Edw. & 

 H. also refer fig. T to this species. 



Var. /. Fig. III represents no doubt a small specimen of 

 the very common Omphyma suhturbinata D'Orbigny, described 

 by him as a Cyathophyllum in Prodr. de Palseontologie 1, 47. 

 It abounds especially in the shale beds of the isle of Stora 

 Carl SÖ. 



Var. d. Fig. IV is probably a variety of Cyathophyllum 

 articulatum Wahlenberg. The constrictions of the polypierite 

 are not so evident in this as in several other specimens of the 

 typical ones, but this depends on the circumstance that it is 

 Single. 



Var. £. Fig. VII. The description comprehends a number 

 of the small Cyathophyllidae and various other hornlike corals. 



') Lithographia svecana n:o 7, p. 445 and n:o 16, p. 463. 

 2) Histoire Nat. Coralliaires III, 394. 



