Vol. 69.] OF THE COMLEY BRECCIA-BED. 33 



having been sharply buckled, but without actual fracture. A 

 somewhat similar distortion is indicated in Linnarsson's figure of 

 Coaoconjplie exsulam? In both instances the test appears to have 

 possessed a considerable amount of flexibility. 



Subgenus Liocephalus Grbnwall, 1902. 

 Conocoryphe (L.) impressa Linnarsson. (PL III, figs. 16 a-16 c.) 



1879. G. Linnarsson, Sver. Geol. Undersokn. ser. C, No. 35, p. 20 & pi. ii, 



figs. 29-30. 

 1902. K. A. Gronwall, Danmarks Geol. Undersog. ser. 2, No. 13, p. 101 & pi. i, 



fig. 25. 



A single cranidium, which is practically complete [1384], is 

 closely in agreement with Linnarsson's description and figure, 

 and may confidently be referred to his species from the Exsulans 

 Limestone of Andrarum. 



The specimen is preserved as an internal cast, with portions of 

 the test adhering. There are very faint traces of the ocular ridge 

 and the associated radiating lines, but no indication of the oval 

 tubercle on the line of the axial furrow, which is mentioned by 

 Linnarsson ; otherwise his description applies well to the Comley 

 specimen. Its convexity ratio is about 1 : 4. 



Linnarsson compares his species with C. lyelli Hicks 2 (as figured, 

 not as described). The South Wales species has, apparently, very 

 distinct glabellar furrows and a strongly-marked ocular ridge ; in 

 these respects it differs from the Comley specimen. 



The form C. emarginata var. longifrons 3 seems to be somewhat 

 intermediate in character between the Comley form of O. impressa 

 and the Swedish C. emarginata Linnarsson. 



The specimen in question is one of the few Middle Cambrian 

 fossils from Comley that are in a state of preservation similar to that 

 of the majority of fragments of the Lower Cambrian Callavia 

 and its associates. The test is partly weathered to a soft chalky- 

 white substance that is easily removed, although in the portions 

 lying deeper in the rock-fragment it is sufficiently hard to preserve 

 the surface-characters. 



Dorypyge Dames. 



DORYPYGE RETICULATA, Sp. nOV. (PI. Ill, figS. 1 rt-15.) 



Dorypyge sp. with reticulate test, Cobbold, Rep. Brit. Assoc. 1912 (Dundee). 



Some twenty head-shields and seventeen pygidia from the 

 Breccia-Bed, with four hypostomas, form the material to hand 

 illustrating this species. 



The specimens taken as the types are as follows : — 



Cranidia [1407, 1411, 1882, and 1886]; hypostomas [1535. 1812, and 

 1814] ; pleura: [1419 and 1472] ; pygidia [1434, 1472, 1819, and 1819a]. 



1 Sver. Geol. Undersokn. ser. C, No. 35 (1879) pi. ii, fig. 21. 



2 H. Hicks, Q. J. G-. S. vol. xxvii (1871) pi. xvi, figs. 1-7. 



s E. S. Cobbold, Q. J. G. S. vol. lxvii (1911) p. 286 & pi. xxiv, figs. 8-13. 

 Q. J. G. S. No. 273. d 



