186 DEVONIAN FAUNA. 



Remarks. — It is exceedingly hard to say whether these interesting but 

 indistinct little fossils all belong to one species or, on the other hand, whether 

 they are merely fragments of fossils which, if fully preserved, would present a 

 different aspect. It seems the simplest plan in the present state of our 

 knowledge to record them by themselves under one heading, without attempting 

 to decide the species or even their genus further than to say that Dr. Gregory 

 considered them more likely to belong to Penniretipora than to anything else, 

 and tluit in that opinion 1 am inclined to bow. 



2. Penniretipora, sp. 



Description. — Stalk rather thick, with occasional alternating secondary 

 branches, which seem generally very short and rounded, but are occasionally 

 longer. Eight branches in 10 mm. 



Size. — A fragmentary specimen measures 8 mm. long. 



Locality. — Lummaton. There is one specimen in my Collection. 



Remarks. — This obscure fragment seems in shape like a Penniretipora, but 

 the arrangement of its pores is unknown. Its peculiarity is the rounded form of 

 its branchlets. 



5. Genus. — Ramipora, Toula, 1875. 



Mr. R. Etheridge, jun., 1 states that Dr. Toula 2 separated a Synocladia-like 

 polyzoon, in which a main stem gives off large branches at the same level on 

 opposite sides, trending upward, and themselves giving rise to shorter and 

 slighter dissepiments on each side, which meet each other and form arched 

 fenestrules. The stem and branches are keeled on each face, and the cells open 

 only on one side, and form longitudinal rows. 



Mr. Etheridge 3 further remarks that the genus is distinguished from Synocladia 

 by (1) the absence of dichotomization of the stem and primary branches; (2) the 

 presence of bilateral symmetry ; (3) the cells all opening on the same plane on 

 each side of the median keel instead of being divided by several longitudinal 

 carinae ; (4) being keeled on both faces; (5) the dissepiments not being all 

 regularly celluliferous. 



One species only has been described from the Permo- Carboniferous rocks of 

 Spitzbergen, and a variety of it from the Caradoc of Wales. 



1 1878, K. Etheridge, jun., 'Quart. Jouro. G-eol. Soc.,' vol. xxxiv, p. 625. 



2 1875, Toula, ' Neues Jahrb. f. Min.,' p. 230, pi. x, figs. I a, b. 



L879, K, Etheridge, jun., ' Geol. Mag.,' dec. 2, vol. vi, p. 211, pi. vi, figs. 1—3. 



