OCT 1 1900 



THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE IV. VOL. VI. 



No. VI.— JUNE, 1899. 



I. — WooDWARDiAN MusEUM NoTEs : A New Carbonifekous 



Tkilobite. 



By F. R. CowPER Eeed, M.A., F.G.S. 



(PLATE X.) 



AMONGST the fossils collected from the Pendleside Limestone 

 of Butterhaw Knoll, Cracoe, Yorkshire, in which Cyphaspis 

 acanihina (Coignou) ^ was discovered a few years ago, there are 

 in the Woodwardian Museum a few specimens of a species of 

 PhilHpsia, which were found in 1889 by Professor Hughes' same 

 geological party. My attention has been recently directed to 

 them, and it has become evident, after a careful examination, that 

 they do not belong to any of the hitherto described species of this 

 genus. The characters of this new species, to which the name 

 Phillipsia cracoensis is given, are as follows : — 



Head-shield nearly semicircular; glabella regularly and gently 

 convex, slightly elevated above the cheeks, cylindrical but narrowing 

 a little in front of the eye-lobe. Anterior end of glabella rounded, 

 not reaching front margin of head-shield, but separated from it by 

 a narrow rounded border ornamented with a few concentric lines. 

 Glabella marked off from neck-ring by a strong undulating neck- 

 furrow consisting of a central portion arched forwards and oblique 

 lateral portions bounding the basal lobes of the glabella. 



Basal lobes of the glabella subquadrate in form, distinctly defined 

 by furrows curving back towards the neck-furrow, before reaching 

 which they become weaker. In front of the furrows defining 

 anteriorly the basal lobes the glabella is marked by three pairs of 

 furrows directed obliquely backwards. The posterior pair is the 

 strongest and longest ; the middle pair does not join the axal 

 furrow ; and the anterior pair, though invariably present, is very 

 short, and in some specimens is represented merely by a pair of 

 small pits. 



Neck-ring broad and band-like, median portion averaging one- 

 fifth the length of glabella and wider than first thoracic segment. 

 Anterior part of lateral portion of neck-ring swollen on each side 

 behind basal lobe to form a small low, elongated, triangular nodule, 

 1 Quart. Journ. Geol. Soc, vol. xlvi (1890), p. 422. 



DECADE IV. VOL. \I. — NO. VI. 16 



