imperfectly-hnown Species oj Corals. 21 



somewhat doubtful by the unusual thickening of the walls, as 

 well as by the free intercommunication between adjoining 

 corallites. 



The single specimen of F. ? inosculans that I have examined 

 does not exhibit any part of either the upper or lower surface 

 in its original condition ; and the preservation of the corallum 

 in a remarkably soft and splintery rock (dolomite ?) renders 

 its microscopic examination peculiarly difficult. At the same 

 time its minute structure is quite characteristic, and suffici- 

 ently separates it from any allied type with which I am ac- 

 quainted. 



Horizon and Locality. Inferior Devonian, Chalonnes. 



Species of Corals associated with the preceding. 



It may be of advantage if I append the following brief 

 notes upon some of the remaining corals which were contained 

 in the collection submitted to me by Mons. ffihlert, and 

 which are associated with the new forms previously described. 



1. Favosifes, sp. A form like F. (jofJilandicus, Lam., in 

 general shape, having a massive corallum composed of regu- 

 larly prismatic corallites of tolerably uniform diameter, their 

 ordinary width being about 2 millims., or rather less. As 

 seen in tangential sections the walls are moderately thin, and 

 no septa can be detected ; but in long sections the walls are 

 sharply undulated, or show well-marked spiniform and in- 

 wardly directed processes. The mural pores are of consider- 

 able si^e, sometimes uniserial, sometimes in two alternating 

 rows on each prismatic face of a corallite. Tabula well 

 developed, mostly half a millimetre or less apart. — Horizon and 

 Locality. Inferior Devonian, St. Malo. 



2. Favosites gothlandicus, Lam. Two specimens, which 

 differ little from the ordinary Devonian examples of this 

 species. 



3. Favosites Forhesi, E. & H., var. (?). Corallum small, 

 rounded, subhemispherical or spheroidal, mostly about an inch 

 in diameter. Corallites of very unequal sizes, the larger ones 

 averaging about 2 millims. in diameter, their walls being thick 

 and their shape cylindrical. The smaller corallites are nume- 

 rous, from rather more than a millimetre to half a millimetre 

 in diameter, very variably shaped, but almost always angular. 

 The tabulee are strong, remote, and approximately horizontal, 

 No traces of septa or septal spines detected. External surface 

 of the tubes marked with numerous fine, slightly-curved 

 stria3. Mural pores of large size, sometimes uniserial, some- 

 times in two subalternate rows on each prismatic face. 



This may be provisionally regarded as a variety of F. 



