GLOSSOGRAPTUS. 309 



Glossograptus cfr. ciliatus, Emmons. Plate XXXIII, fig. 1. 



1855. Glossograptus ciliatus, Emmons, American Geology, vol. i, p. 108, pi. i, fig. 25. 

 1908. Glossograptus ciliatus, Buedemann (pars), Grapt. New York, pfc. 2, p. 379, pi. xxvii, 

 figs. 1 — 4. 



Polypary broad with parallel margins, from 1 — 2 cm. or more in length, and 

 with a maximum breadth of about 4 mm. Theca? ten in 10 mm., with 

 long and somewhat delicate spines ; apertural margins approximately 

 horizontal. 



Description. — The species here described and figured is the only British one 



that appears to us to resemble Emmons' species, to 



Fio. 204. — Glossoqraptus cfr. ciliatus, i • i ■., • i i i ic n e t n i n 



v ** which it is here doubtfully referred. All the speci- 



mens are small, and probably represent young 

 forms ; the one here figured shows the parallel 

 margins, broad base, and relatively long and slender 

 (ciliate) spines characteristic of the type specimens 

 figured by Emmons. In our British examples it 

 is impossible to distinguish the apertural from the 

 septal spines. 



The sicula is partially visible for a length of 

 Proximal end shomngsiciiia. Enlarge- g mm ] mt fa apertural spines are not preserved. 



luent ol part of PL XXXIII, fig-, la. x L L 



Affinities. — Glossog. cfr. ciliatus resembles in some 

 respects Glossog. acanthus, but differs in having sub-parallel margins and longer 

 and more delicate spines. From Glossog. Hinclcsii it appears to be distinguished 

 by the broader base of the polypary, the more distant thecas, and the characters of 

 the spines. 



Horizon and Locality. — Llandeilo. Wales : Ty-Obry. 



Associates, etc. — Glossog. cfr. ciliatus is found in the Llandeilo rocks of Ty-Obry 

 associated with various Diplograptidas. 



Collection. — Sedgwick Museum. 



Glossograptus Hincksii (Hopkinson). Plate XXXIII, figs. 2 a — -j. 



1872. Diplograptus Hinclcsii, Hopkinson, Geol. Mag., vol. ix, p. 507, pi. xii, fig. 9. 



1876. Glossograptus Hinclcsii, Lapworth, Cat. West. Scott. Foss., pi. ii, fig. 57. 



1877. Glossograptus Hinclcsii, Lapworth, Proc. Belfast Nat. Field Club, p. 134, pi. vi, fig. 24. 



Polypary 2 — 4 cm. in length with rounded base, widening rapidly to a 

 maximum breadth of 3 mm., which is then maintained. Sicula obscure, 

 apertural spines of sicula and of all proximal thecas directed more or less 



