•202 DEVONIAN FAUNA. 



Description. — Dorsal cup rather small, pyriform. Attachment of column rather 

 large. Basal plates narrow, unequal. Radials five, hexagonal. Primibrachs in two 

 rows. Secundibrachs ? First interradial large, hexagonal, situated between the 

 radials and first primibrachs, succeeded by two rather smaller hexagonal inter- 

 radials. Tegmen flat, rather constricted, covered by numerous small plates. 

 Anal aperture lateral. Plates bearing low irregular rugosities. 



Size. — About 19 mm. high, 23 mm. wide, 20 mm. broad. 



Locality. — There is a specimen in the Torquay Museum. As in most of the 

 other fossils in this Museum, the locality has not been preserved, but it has the 

 character of the Lummaton Beds. 



Remarks. — This calyx is nearly perfect although obliquely crushed, but unfor- 

 tunately the surface is so much cracked aud injured that its ornament is almost 

 destroyed, and comparatively few of the plates can be exactly traced. After com- 

 paring it, however, with Goldfuss's figures of M. hieroglyphicus, it seems to me that 

 its likeness to them is so great that it may belong to the same species though it is 

 less like those of later authors. Specimens of M. mespiliformis, Fraipont, 1 kindly 

 shown me by Mr. Bather, closely resemble its shape (as crushed), but differ in being 

 smooth. 



III. Family. — Rhodocrinice, F. Romer, 1855. 

 1. Genus. — Thylacocrinus, CEhlert, 1879. 

 1. Thylacocrinus? sp. Plate XXIII, fig. 11. 



Size of fragmentary specimen. — Height 20 mm., width 18 mm. 



Locality. — A single specimen is in my Collection from Lummaton. 



Remarks. — This specimen is a well-preserved fragment containing about 20 small 

 massive plates, which are more or less perfect hexagons, and have deeply 

 I x 'veiled margins and irregularly corrugated surfaces. Their interpretation is 

 very difficult, but I find that they may be matched plate by plate with part of the 

 calyx of Thylacocrinus Vamdoti, (Ehlert, 2 though rather smaller in size. If this be 

 so, a row of basals is succeeded by three rows of radials and brachials in each area, 

 between which is seen an interradial followed by a second row of two. In spite 

 of the imperfection and doubtfulness of the specimen, it seems worth recording, 

 as it evidently belongs to a crinoid undescribed from South Devon. 



1 L883, Fraipont, 'Ann. Soc. Geol. Belg.,' vol. x, p. 03, pi. 5, figs. 8—10. 



2 L879, (Ehlert, ' Bull. Soc. Geol. Fr.,' ser. 3, vol. vii, p. 7, pi. i, fig. 3. 



