IN THE MANCHESTER MUSEUM. 



Pygocephalus Cooperi, Huxley, 1857. 



23 



1857. Pygocephalus Cooperi, Huxley, Quart. Journ. Geol. Soc, xiii., p. 363, 



pi. xii., figs. I, ifl, lb. 

 1862. „ ,, Id., Quart Journ. Geol. Soc, xviii., p. 421. 



Pygocephalus Cooperi, Huxley, magnified ij diameter, a. Quadrate disk; 



b. Central part of the body ; c, Semicircular disk ; d. Marginal portions of 



Carapace ; e, Tergal surface of abdominal somites ; i' , Antennules ; 2' , Base 



and inner division of antenna ; 2", Outer division of antenna or scale. 



Type. — The most complete of three specimens upon which 

 Huxley founded the species. Huxley speaks of this species 

 as affording " the first certain evidence of the existence 

 of Podophthalmia at so early a period as the Carboniferous 

 epoch." 



Medlock Park Bridge, Ashton-under-Lyne, Lanes. 



Shale of Middle Coal Measures. 



Hymenocaris vermicauda, Salter, 1852. 



1852. Hymenocaris vermicauda, Salter, Rep. Brit. Assoc, p. 58. 



— „ „ Id., Quart. Journ. Geol. Soc, x., p. 210. 



— „ „ Id., Mem. Geol. Surv. iii., p. 293. 



1892. „ „ Jones and Woodw., Brit. Pal. Phyll., Palaeont. 



Soc, p. 77, pi. xiii., figs. 10 and 11. 



