630 LINDSTRÖM, ON THE »CORALLIA BALTICA>^ OF LINN^US. 



1873 Streptelasraa Milne Edwardsii, Dybowski Zeitschr. 



Deutsche Geol. Ge- 

 sells. p. 410, Taf. 

 XIII, f. 5—10, 12. 



1873 Ptychophylliim truncatum Lindström Under-Siluriska 



Koraller, Öfvers. Vet. Aks 

 Förhaiidl. n:o 4, p. 29. 



There can not be the slightest doubt that LiNN^us meant 

 this species as bis description and figure sufficiently show- 

 Wahlenberg's truncatus is an Acervularia. 



P. 24, N:o V. Madrepora composita, corporibus proliferis 

 e centro solitariis, coadunatis, stellce margine dilatato. Fig. 

 XI, n:o 4. 



1749 » » Am. Ac. I, p. 94. 



1758 Madrepora stellaris S. N. ed. X, p. 795. 



1761 » » F. Su. ed. II, 536. 



1767 » » ^ S. N. ed. XII, 1277. 



1768 Madreporus (Helminthol.) stellaris S. N. ed. XII, pars 



III, 67. 

 1820 Strombodes stellaris Schweigger Handb. 418. 

 1851 » >: M. Edw. H. Pol. pal. 431. 



1874 Spongophyllum contortiseptatum Dybowski Monographie 



p. 228, pl. IV f. 2, 2 a. 

 1885 Ptychophyllum stellare Lindström List of Fossils U. 



Sil. Form. of Gotland, p. 19. 

 1894 Endophyllura contortiseptatum and var.pra?cursorWEISS- 

 ERMEL Korallen der Si- 

 lurgeschiebe Ostpreus- 

 sens etc. p. 601 — 603, pl. 

 48 f. 1—3. 

 This most characteristic coral is found in the eastern parts 

 of Gotland and is pretty common in the strata called </, in situ 

 as well as in large detached blocks. There is no justifiable reason 

 why the old Linnean names which have been in use from 1758 

 till 1874 should be set aside for new ones, which the ignorance 



