K0LL1KER, OX VEGETABLE PARASITES. 179 



uished with sporangia. The calcareous skeleton, moreover, 

 contained numerous elongated cavities, placed in rows, and 

 forming elegant feather-like figures. These appeared to be 

 typical of the species, since they were always present, and 

 were too regularly disposed to allow of their being possibly 

 referred to a fungus. 



(c) Oculina diffusa. 



Fungus-filaments fine, scarcely exceeding OOOl"' in dia- 

 meter, in places much branched, so as to constitute figures 

 resembling a stag's horn. Sporangia indistinct, sometimes 

 round, sometimes appearing to occupy long tracts on the 

 filaments. A great many small cavities, of irregular dispo- 

 sition and form, existed, which are necessarily to be referred 

 to the fungus-filaments, and must not be taken to represent 

 sections of them. 



(d) Oculina. Sp. 



Fungus-filaments fine, some very minute, which latter 

 were frequently undulating in their course. No sporangia. 

 Numerous opaque, minute points were noticed, which, as in 

 the preceding species, are also probably to be referred to the 

 parasitic growths. 



(e) Millepora alcicornis. 

 As in Porites, except that the filaments, and sporangia 

 were less numerous. 



(/) Lobalia prolifera. 



Fungus-filaments very numerous, but extremely minute, so 

 that in most of them the canal and double contour could not 

 be distinguished. 



Course straighter. Branches rarely seen ; and the only 

 traces of sporangia consisted in irregular protrusions at the 

 extremities of the thicker filaments. 



(g) Alloporina mirabilis. 



Filaments still more minute, but numerous. More intimate 

 condition unascertainable. No sporangia. 



(h) Mceandrina. 



Fungi sometimes rare, sometimes very abundant. Fila- 

 ments thick, even of considerable dimensions up to 0*006, or 

 even 0-008'", branched. Sporangia apparently elongated, 

 but in my sections nowhere quite perfect. 



