Rev. G. F. Whidbonie — Devonian Fossils, Devonsliire. 539 



Cladochonus cf. ScHLxTTERi, Holzapfel. (PI. XVIII. Fig. 11.) 

 Cf. 1895. Cladochonus Schluteri,'B.o\zSiT^ie\: Abh. k.p. Geol. Landes.,N.s., pt. xvi, 

 p. 305, pi. xii, figs. 1, 2, 4, 5, 7. 



Two specimens of Cladochonus come very near to Holzapfel's 

 species, which Schliiter had before referred to CI. alternans, 

 F. A. Eomer, sp. They differ from each other considerably in 

 size, suggesting that our species was very variable. Nor do they 

 agree very well with Holzapfel's coral as against Eomer's ; for, 

 while they have the habit of the former, they are more like the 

 latter in the stoutness of the stems. Our material is, however, 

 insufficient to define them properly. 

 Pleurodicttum ? PACHYPORoroES, n.sp. (PL XVIII, Figs. 12, 12a.) 



Corallum forming masses, which often become very elongate and 

 ramose. Base and epitheca unknown. Corallites large, short, 

 polygonal, obliquely radiating, with thick walls, which are pierced 

 by a few irregularly placed, straight, horizontal canals ; a few 

 corallites being much smaller than the rest. 



Size of corallites : 2 or even 3 mm. in diameter ; about 5 or 6, or 

 rarely 9 or 1 mm. long. 



This abundant species is very perplexing. It appears to have 

 the structure of Fleurodictyum, but the habit of Fachypora. In one 

 instance a specimen appears attached to the mould of a crinoid- 

 stem, and has in one place all the appearance of an ordinary 

 Pleurodictyum, radiating from a centre. In this case the epitheca 

 may have been destroyed, the crinoid-marks being obliterated 

 from the mould, which is covered by minute longitudinal lines. 

 Occurring only as casts, the connecting-rods are very noticeable. 

 They are sometimes nearly 1 mm. long. They are placed on the 

 flat sides, and have sometimes an irregularly vertical arrangement. 

 The state of preservation is such as to allow no signs of septal stri» 

 or tabulae. The corallites are very much larger and shorter than 

 those of Fachypora cervicornis, De Blain. 



EXPLAXATIOX TO PL.A.TE XYII. 



Devonian Fossils from Lynton. 



The specimens are in Mr. J. G. Hamling's coUection, and are drawn natural size. 



Fig. l.—Pterinea fasciculata, Goldfuss. Left valve, restored from the mould and 



cast. Woodabay. 

 Fig. 2. — The same, cast of anterior end. This has been accidentally drawn with the 



anterior end upward, and should be turned through a quarter circle for 



examination. 

 Fig. Z.—Modiomorpha lamellosa, Sandberger, sp. Cast of right valve, showing 



part of hinge, defective in front. Lee Bay. 

 Fig. 4. —The same, cast of both valves, showing the anterior muscle-mark {b). 



Lee Bay. 

 Fig. o.—NucuIa Lodanensis, Beushausen. Cast of right valve, imperfect on the back. 



Barhrick Mill. 

 Fig. Q. — Spirif*raI>aUide)ms,%ieYoingex. Distorted cast of dorsal valve. Lee Bay. 

 Fig. l.—Splrifera paradoxa, Schlotheim, sp. Dorsal valve, restored from a cast 



and mould. Woodabay. 

 Fig. 8. — Orthotetes hipponyx, Schnur, sp. Dorsal valve of a j-oung specimen, one 



side of which is irregularly alate. 

 Fig. ^.—Orthis longisulcata, Phillips. Cast of ventral valve. Barhrick Mill. 



