42 TRILOBITES OF GIRVAN. 



of well-marked, slightly arched, long lateral furrows on the glabella which has a 

 subcircular shape with rather a broad anterior tongue (not well preserved). These 

 furrows are distinct in the cast but less so on the surface of the shell, which is 

 minutely punctate. On the inner side of the deep furrow separating the glabella 

 from the band-like eye-lobe there are minute granulations at the posterior lateral 

 angles of the glabella, succeeded anteriorly by a few fine concentric striae. The 

 neck-ring is smooth, save for a few lateral serrations on the posterior edge. The 

 bases of the eyes indent the sides of the glabella as in B. colbii, and this seems 

 to be the only important difference from B. nanus, which, according to the descrip- 

 tions and figures, has a similarly shaped glabella and anterior tongue, and three pairs 

 of similar lateral furrows. 



Collection.- — Mrs. Gray. 



Horizon cool Locality. — Stinchar Limestone Group (Llandeilo) : Craighead. 



0. Remopleurides cf. platyceps, M'Coy, 1846. 



1846. Remopleurides platyceps, M'Coy, Synops. Silur. Foss. Ireland, p. 44, pi. iv, fig. 2. 

 1854. Remopleurides platyceps, Morris, Cat. Brit. Foss., 2nd. ed., p. 115. 

 1803. Remopleurides platyceps, Salter, Mem. Geol. Surv., dee. vii, No. 8, p. 9. 

 1877. Remopleurides platyceps, Woodward, Cat. Brit. Foss. Crust., p. 58. 



1879. Remopleurides sp. ind. a, Nicholson and Etheridge, Mon. Sil. Foss. Grirvan, fase. ii, p. 149, pi. x, 

 figs. 9, 9 a. 



Remarks. — The poorly preserved specimen of a portion of a glabella and thorax 

 which Nicholson and Etheridge figured as BemopleuriJes, sp. ind. a (M, pi. x, 

 figs. 9, 9 a), has much resemblance to B. platyceps, M'Coy, in the tuberculated 

 surface of the glabella and absence of furrows, but in shape it more resembles 

 B. colbii. It is too imperfect for precise determination. 



Collection.— Mrs. Gray (f. M.). 



Horizon and Locality. — Drummuck Group (IT. Bala) : Drumnmck. 



Genus SHUMARDIA, Hillings. 



1. Shumardia scotica, sp. nov. Plato IV, fig. 12. 



Hyecijic Characters. — Head-shield semi-elliptical, gently convex, a little broader 

 than long, posterior border nearly straight; genal angles nearly rectangular, not 

 pointed. Glabella rather more than one third the width of the head-shield and about 

 three-fifths its length, not reaching front margin; posterior half semi-cylindrical, 

 defined by strong straight axial furrows; anterior half broader, projecting laterally 



