VINE: XOTES ON YOEEDALE POLYZOA. 
79 
J^orth Lancashire shales, where it is tolerably abundant, especially 
at Holker Park. In a conversation that I had lately with Mr. John 
Young at the Hunterian Museum, Glasgow, he assured me that he 
had never met with the species in any of the Scotch shales, and I 
have no examples among- my American Carboniferous Polyzoa with 
which I can compare it. 
8. PlNNATOPOKA KECTICAETNATA, Young. 
= Glauconome id. Y. Proc. Nat. Hist, Soc, Glasgow, 1880, pp. 257, 
259. 
Zoarium robust or delicate, main stem and pinuse strongly 
carinated. Zomcia oval, rather more than their length apart, one 
at the base of each pinnule, and one in the space between ; 
peristomes prominent, surrounded with close set tubercles ; cells on 
the main stem and pinnules alternate. Carina straight, delicately 
tubercled, close set. Pinnules rather more than a line in length, 
opposite or slightly sub-altei-nate. Reverse flat or slightly rounded, 
and ornamented with from throe to four rows of granulated striae. 
Horizon : Yoredale ; but widely distributed in the English and 
Scotch shales. 
Localities: Holker Park, Gleaston Castle, Little Urswich. Hurst. 
In the peculiar ornamentation both of the face and of the 
reverse, this widelj^ distributed polyzoon approaches the nearest to 
the P. ornata as described above. There is, however, no possibility 
of confounding the two species. This form is rather abundant in 
the Lancashire shales^ but it is not b}^ any means a common form in 
the English shales generally. 
9. PiNNATOPOKA FLEXICAPJXATA, Young & Young, 
Glauconome id. Y. & Y., Proc. Nat. Hist. Soc., Glasgow, March, 
1875, pi. II., figs. 1-7. 
= Glauconome aspera. Vine, Proc. York. Geol. Soc, 1881, p. 334, 
pi. XVI., fig. 3. 
The present species is distinguished from P. recticarinata by 
possessing a " broad prominent mesial ridge, which undulates 
regularly from side to side, following the alternations of the cells." 
It is by no means so common as the above, yet Mr. Young 
suggested that probably P. recticai-inaia may be only a variety of 
