Notes on Sjjccies of Ceratiocaris. 465 



set of caudal appendages. The style (central) shows a rounded 

 section at its insertion, about 2 ram. wide, is 12 mm. long, tapering 

 gently to a sharp point. The lateral stylets are 8 mm. each. All 

 are delicately ridged and fluted. From the Lower-Ludlow or 

 Aymestry Limestone, on the old road at Mocktree ; collected by the 

 late Mr. Lightbody. 



Mus. Pract. Geol. d ff (Catal. C. S. Foss. 1878, p. 118), from the 

 Lower Ludlow at Leintwardine, is a somewhat similar little set of 

 appendages (three spines). The middle one is the longest, 8 mm., 

 the others 6 mm. 



These may belong to a very young condition of some of the species 

 above mentioned, or possibly to a distinct species. 



In the British Museum one of those marked 58878, from Linburn, 

 near Muirkirk, shows a style (21 mm.), tapering, with circular sec- 

 tion at base, and apparently smooth, together with a corresponding 

 attached stylet, 16 mm. long. Were these not smooth, they might 

 be referred, to the same species as the foregoing smaller specimens. 

 This set differs from the appendages of either C. papilio or C. stygia. 



15. Ceratiocakis decora, Phillips. 



1848. Onchus decorus, Phillips. Mem. Geol. Surv. vol. ii. part I, p. 226, pi. 30, 



figs- 5> 5«- 

 1867. Ceratiocaris decoriis, Salter. In Siluria, 3rd (4th) edit. p. 516. 

 ■1877. ,, ,, H. Woodward. Cat. Brit. Foss. Crust, p. 70. 



This is a small obscure style (?), 13 mm. long, from the Ludlow 

 beds, of Freshwater-East, Pembrokeshire. 



16. Ceratiocaris (?) ensis, Salter. 



i860. Ceratiocaris? ensis, Salter. Ann. Mag. N. H. ser. 3, vol. v. p. 159. 



1867. ,, ,, Salter. In Siluria, 3rd edit. p. 516. 



1877. ,, ,, H. Woodward. Catal. Brit. Foss. Crust, p. 71. 



In the drindrod Collection, Oxford Museum, specimen 0, we find 

 the original fossil described by Mr. Salter in 1860, namely, a large 

 telson nearly six inches long, tapering, curved, lying on its side, and 

 flattened, crenato-serrate on its convex (dorsal) edge, pitted along its 

 inner (concave) margin, thickened at its proximal or articular end, 

 sharp at the other; with a slight ridge along the middle of the ex- 

 posed face. From the Lower Ludlow at Leintwardine, near Ludlow. 



17. Ceratiocaris (?) lata, Salter. 



1866. Hymenocaris ? latus, Salter. Mem. Geol. Surv. vol. iii. p. 240. 



1866. Ceratiocaris ? latus, Salter. Ibid. p. 294, woodcut fig. 5. 



1867. ,, ,, Salter. In Siluria, 3rd (4th) edit. p. 516, 

 1873. ,, ,, Salter. Cat. Camb. Sil. Foss. p. 16. 



1877. ,, ,, H. Woodward. Cat. Brit. Foss. Crust, p. 71. 



The specimen is in the Cambridge Museum (Z//299?), and shows 

 5 (?) abdominal segments crushed endwise, so as to be shortened 

 (12 mm.) and widened (28 mm.). The woodcut referred to is a 

 restoration. The specific, and even generic, relationship is obscure. 

 From the Tremadoc Slate, at Garth, east of Portmadoc ; collected by 

 Mr. D. Horafray. 



DECADE III. — VOL. II. — NO. X. 30 



