£46 DR. G. J. HINDE AND MR. HOWARD POX ON [Nov. 1895, 



(d) Trilobites. By Dr. Henry Woodward, F.R.S., P.G.S. 



The intimate knowledge which Dr. "Woodward possesses of Car- 

 boniferous trilobites, and especially of those from the Lower Culm 

 Measures of Waddon Barton, near Chudleigh, South Devon, which 

 he described in the Palaeontological Society's volume for 1883-84, 

 led us to seek his assistance in determining the forms from the 

 Badiolarian Beds of North Devon, from which hitherto no trilobites 

 have been recorded, and he has prepared the subjoined descriptions 

 of them, for which we desire to express our sincere obligations to 

 him. 



Phillipsia Leei, H. Woodw. PI. XXVIII. figs. 1 & la. 



1883-84. ' Brit. Carbcmif. Trilobites,' Pal. Soc. p. 66, pi. x. figs. 1, 2, 3, & 4. 



This is a detached cheek of rather larger size than those obtained 

 from the Culm of Waddon Barton, and it is interesting as showing 

 the facets of the eye, which are not well seen in Mr. Lee's speci- 

 mens ; the surface is covered with fine, waving, anastomosing lines, 

 of a different colour from the cheek. Also a conical glabella from 

 the same bed. 



Length of cheek 8 mm., breadth 4 mm. ; the extremity of the 

 cheek-spine is broken off. The glabella is 4 mm. in length by 

 2-5 mm. in breadth. 



From the buff rottenstone with radiolaria at Hannaford Quarry, 

 near Barnstaple. Collected by Mr. G. F. Tregelles. Also from the 

 red shales of the Lower Culm at Waddon Barton, near Chudleigh, 

 Devon. 



Phillipsia minor, H. Woodw. PI. XXVIII. fig. 2. 



1883-84. ' Brit. Carbonif. Trilobites,' Pal. Soc. p. 68, pi. x. figs. 5, 6 a & b, 7, & 8 a. 



This species is represented by two pygidia, both from Hannaford 

 Quarry, the smaller one measuring 4 mm. in length by 4'5 mm. 

 in breadth, and the larger 6 mm. in length by 7 mm. in breadth. 

 The axis of the tail is elevated, and diminishes rapidly in size from 

 before backwards ; it is surrounded by a broad, smooth margin. 

 There are about 12 segments on the axis ; the pleurae" bifurcate. 



This form also occurs in the Lower Culm of Waddon Barton. 



Phillipsia Cliffordi, H. Woodw. PI. XXVIII. figs. 3 & 3 a. 



1883-84. ' Brit. Carbonif. Trilobites,' Pal. Soc. p. 69, pi. x. figs. 8 b, 9, 10, 11, & 12. 



This species is represented by a head and tail of a small individual, 

 the thoracic segments having been displaced or lying underneath. 

 This specimen, together with the impression and counterpart of a 

 small tail, come from Combe Wood quarry, Codden Hill, near 

 Barnstaple. 



An impression and counterpart of 5 thoracic segments attached 

 to a pygidium comes from the soft radiolarian shales of Tawstock, 

 near Barnstaple. 



