160 BRITISH PALAEOZOIC PHYLLOCARIDA. 



are seen to be puncLate. Figs. 5 a, b, indicate the passage of tlie strite of the 

 upper (forward) part of the ventral fringe into the meshwork of the superficial 

 ornament. 



The history and geological position of the specimens in PL XXV (which were 

 kindly sent to us by Mr. P. F. Kendall, F.G.S., of the Yorkshire College, Leeds), 

 and of others shown in Pis. XXX and XXXI, which were obligingly communicated 

 by Mr. E. J. Garwood, F.G.S., ai*e recorded by Mr. Garwood in the ' Geol. Mag.,' 

 dec. 4, vol. iv (1897), p. 556, as follows : 



" At present a collector is eui^aged upon the fauua of the Millstone-grit at Eecup, five miles 

 north of Leeds, where a fossiliferous black shale has been met with during the excavation o£ a puddle- 

 trench lor a reservoir. The bed occurs about the centre of the 'Middle Grits' of the Yorkshire 

 Millstone-grit. The bed, which was discovered by Mr. Percy Kendall some three years ago, contains 

 a rich marine fauna, which has not yet, however, been ])roperly worked out. The fauna includes 

 species of Nucula and Leda in great abundance and in excellent preservation, also numerous indi- 

 vidual speciiyeus of Lin;/ula and Discina. Gasteropods occur, and a few specimens of Goniatites, 

 together with well-preserved specimens of Conularia. 



" Several specimens of 2)«7//y}'Ofn?v's have been found, and a single specimen of a minute Trilobite, 

 cf. Brachi/metopiis Ouralicits. Fish-remains referable to two genera have been identified. 



" The fauna appears to bear little resemblance to that rf the Cayton-Gill beds of Nidderdale, 

 which lie at approximately the same horizon in the Millstone-grit. On the whole the fauna appears 

 to resemble in many points that of the Eidsdale Iroustone Shale of the Bernieian beds of South 

 Nortliumberlaiid." 



PL XXVII, figs. 1 ((, h, c. Neilson Coll., B. 



Size. — Fragment of a right-hand moiety, measuring 20 mm. by 20 mm. From 

 the ventral border to the mesolateral ridge, 12 mm. 



Characters. — This is a part of the postero-ventral region of the right moiety 

 of a carapace, retaining a portion of the mesolateral ridge, with its angular 

 rugge ; also some of the thick ventral border, with its broad margin; this passes 

 into a narrow and almost cord-like edge in the upper (forward) part of the 

 border (not shown in the figure). 



The carapace is delicately ornamented with numerous oblique, thin, sinuous, 

 interrupted rugulse or wrinkles, parallel and anastomosing, having irregular inter- 

 spaces (figs. 1 h, c). It is possible that in some other parts of the test these 

 winnkly striae may have become more definitely reticulate ; and may have 

 approached the pattern shown by PL XXV, fig. Sb. 



In some respects this specimen approaches D. Scouleri, M'Coy (PL XXV, 

 fig. 6) ; but its proportions and its ornament distinguish it. 



Brownish non-calcareous shale, East Kilbride. 



Leeds Mus. Coll., No. 3(). Not figured. 



Fragment of a large valve of D. insignis, measuring 20 mm. from the ventral 



