20 BRITISH PALi^OZOIC PHYLLOCARIDA. 



Length of PL III. fig. 4. PI. Ill, fig. 7. PI. IV, fig. 1. PI. V, fig. .i. PI. VI, fig. 1. 



Style 90 mm. -t — 105 mm. -i 116mm. "i 105 ? mm. | 



(not perfect)' 3 (not quite perfect). 5 (imperfect). J (imperfect). 5 



Stylet — 75 mm. 64 mm. — — 



The following specimens belong to G. Murchisoni : 



1. A good specimen of three segments and tliree caudal spines from the 

 Wenlock Shale of Cwm-y-sul, near Welshpool, in the collection of J. Bickerton 

 Morgan, Esq., of Welshpool. 



2. A somewhat similar specimen in the Owens College, Manchester. No 

 locality. 



3. Also, in the same Museum, part of some caudal appendages marked " A. L., 

 opposite New Bridge." Greenish calcareous mudstone. Lightbody Coll. 



4. Another in Owens College is a piece of a straight ridged style, marked 

 " U. L. Whitcliffe wd." 



5. In Owens College a somewhat similar fragment in greenish, micaceous 

 mudstone, with casts of Beyrichia Wilckensiana and of small Primitive, is labelled 

 "By fish-bed; Ludford Lane." 



6. Oxford Museum P is a small fragment of a telson strongly ridged, said to 

 be from Upper-Ludlow Beds of Usk, in squeezed, imperfectly cleaved, olive-grey 

 mudstone, with small Brachiopods. 



7. Ludlow Museum T comprises the large part of a style and fragment of a 

 stylet. Prom the Lower-Ludlow beds of an old roadside quarry at Trippleton 

 Farm, one mile from Leintwardine, Shropshire. Lightbody Coll. 



8. Numerous small pieces of ridged caudal spines occur in the Upper Ludlow 

 Fish-bed: as in the British Museum Nos. 19821, 26045, 26046,33216, 33322, 

 1.151, &c. 



3. Ckbatiooaris valida, T. B.J. and 11. W., 1886, PI. VI, figs. 10 and 11. 



1866. Ceeatiocaeis Muechisoni, H. Woodward. Geol. Mag., vol. iii, p. 205, 



pi. 10, figs. 8, 9. 



1877. — — — Catal. Brit. Fobs. Crust., p. 71. 



1878. — — (part), H. N. ^ E. Catal. Camb. and Sil. Foss., 



M. P. G., p. 84. 



1885. — — T.B.J.S( H. W. Third Eeport Pal. Phyll., 



Brit. Assoc, p. 337 ; and 

 Geol. Mag., 1885, p. 388. 



1886. — VALIDA, — Fourth Eep., Brit. Assoc, 



p. 230; Geol. Mag., 1886. 

 p. 456. 



