THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE IV. VOL. II. 



No. II.— FEBRUARY, 1895. 



WOODWARDIAN MuSEUM NoTES. 



I. — New Trilobites from the Bala Beds of Co. Watebfokd. 



By F. R. CowPER Reed, B.A., F.G.S. 



(PLATE III.) 



AMONGST the numerous species of Trilobites wbich occur in the 

 impure limestones of Bala age in Co. Waterford, two new and 

 undescribed forms were recently found by me in the course of a 

 preliminary examination of that area. At present the exact horizon 

 of the beds has not been determined, but they may undoubtedly 

 be referred to the Bala series. One of the new species belongs to 

 the genus Cyhele, and is a most bizarre form, with a long, snout-like 

 pi'ojection of the anterior margin. The other is a new species of 

 Triimdeiis, bearing some resemblance to Angelin's T. bucculentus, 

 which occurs in beds of " I'egio Ba " in Norwa3\ 



The following descriptions give in detail the characters of the 

 new species. 



Cyhele tramorensis, n. sp. (PI. III. Fig. 1.) 



The only specimen of this new species was discovered in the 

 townland of Quillia, and consists of a head-shield which is un- 

 fortunately not quite perfect; but it shows sufficient new characters 

 to warrant us in considering it specifically distinct from any hitherto 

 described. 



It is semicircular in outline, vi^ith an anterior projecting process, 

 and it is about twice as wide as long. The glabella is oblong, and 

 the sides converge a little towards the anterior end, which is in 

 the shape of a slightly convex-forwards arc. The glabella is 

 gently elevated above the cheeks, but is rather flattened in front. 

 The side-furrows are four in number, including the neck-furrow. 

 The first or anterior one is merely an elongated deep pit, which 

 does not join the axal furrow ; it is directed forwards at an angle 

 of 45° to the axis of the glabella. The frontal lobe is thus only 

 marked off by this pair of isolated pits. The second or middle side- 

 furrow is also an obliquely-set indentation inclined to the axis of 

 the glabella at an angle of about 70° and directed forwards and 

 outwards ; at its inner end it is deep, but suddenly decreases in 

 depth when traced outwards, and leads into the axal furrow by only 

 a very shallow groove. The first lobe which it limits posteriorly is 

 a short rounded ridge, not marked off very distinctly by the axal 

 furrow at its outer extremity. 



DECADE IV. YOL. II. NO. II. 4 



