SCAPH10CR1NUS. 231 



two faces of a slab divided horizontally). As far as can be seen, a specimen (on 

 the two faces of a slab divided longitudinally) from Barnstaple in the Woodwardian 

 Museum belongs to the same species ; as perhaps does also a fine but obscure 

 specimen (divided longitudinally) from Poleshill, in the Porter Collection, and a 

 specimen from Braunton in the Museum of Practical Geology. 



Remarks. — I have drawn up the above description from the specimen from 

 Upcott Arch. While the Woodwardian specimen from its corrugated surface and 

 its general appearance seems probably identical, its plates are not sufficiently 

 clear to make this certain. Its cup is of a low vasiform shape, the large radials 

 bending outwards and being convex, so that a section across them would be 

 petaloid. In most of the rays the second primibrach is axillary, but in one (the 

 right anterior P) the first primibrach seems axillary, or at least it is shorter than 

 the corresponding pairs, and no suture can be traced across it. Its arms appear 

 to be ten in number, and clothed with strong pinnules. 



To what genus this species (with the Upcott Arch specimen for its type) may 

 belong is a perplexing question. It appears to me clear that the first a)ial is 

 included in the basal ring, and is level with the basals ; but, according to 

 Wachsmuth and Springer, this arrangement exists in none of the Tnadunata, 

 though Bather 1 has since proved it to occur in Thenar iocrinus and one or two 

 other genera, to neither of which, however, our species in other respects approxi- 

 mates. This position of the azygous plate would probably be a character of generic 

 importance, but our specimens are not sufficiently good and indubitable to form 

 the type of a new genus. The only course, therefore, is to leave them for the 

 present in Scaphiocrinus, and await the evidence of further finds. 



4. Scaphiocrinus, sp. Plate XXXIV, fig. 8. 



Description. — Stem circular, with very unequal alternating columnars which 

 have convex peripheries. Dorsal cup very shallow, bowl-shaped. Infra-basals 

 pentagonal, very short. Basals about as high as wide. Radials large. First 

 primibrach s very large and long, axillary. Arms large and very long, composed of 

 rather short cuneate plates, bifurcating at about the sixth plate, and clothed with 

 large and stout pinnules. Anal side unknown. 



Size. — A cup is about 4 mm. wide. 



Localities. — In the Museum of Practical Geology is one specimen from Barn- 

 staple and one from Braunton Down ; in the Woodwardian Museum one (on two 

 slabs) from Barnstaple ; in the Porter Collection one from Poleshill ; and in my 

 Collection one from Top Orchard. 



1 1890, Bather, ' Ann. Mag. Nat. Hist.,' ser. vi, vol. vi, p. 222. 



