20 BRITISH PALEOZOIC PHYLLOCARIDA. 



Length of PI. Ill, fig. 4. PI. Ill, fig. 7. PI. IV, fig. 1. PI. V, fig. 3. PL VI, fig. 1. 



Style 90 mm. | — 105 mm. | 116mm.-) 105 ? mm. -> 



(not perfect) - 5 (not quite perfect). ) (imperfect). ) (imperfect). 3 



Stylet — 75 mm. 64 mm. — — 



The following specimens belong to G. Murchisoni : 



1. A good specimen of three segments and three 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. From 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. Ckuatiooaris valida, T. B.J. and IL. W., 1886, PI. VI, figs. 10 and 11. 



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



pi. 10, figs. 8, 9. 



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



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



M. P. Q-., p. 84. 



1885. — T. B. J. Sf H. W. Third Report Pal. Phyll., 



Brit. Assoc, p. 337 ; and 

 Geol. Mag., 1885, p. 388. 



1886. — valida, — Fourth Rep., Brit. Assoc, 



p. 230; Geol. Mag., 1886, 

 p. 456. 



