CERATIOCAKIS? LATA. 63 



By the side of the telson are two blade-Hke stylets, neither perfect (6 mm. long, 

 as preserved), smooth and flattish, but thicker along their outer half. 



There are also known some doubtful British forms that have been referred 

 to Ceratiocaris, for illustrations of which we direct attention to the figures given 

 with the original descriptions (see below). 



29. Ceratiocaeis decora (Phillips), 1848. 



1848. Onchus decorus, Phillips. Mem. Geol. Sarv., vol. ii, part 1, p. 226, 



pi. 30, figs. 5, 5 a. 

 1860. Ceeatiocaeis decortts, Salter. Ann. Mag. Nat. Hi.st., ser. 3, vol. v, p. 158. 

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



1877. — — R. Woodward. Cat. Brit. Foss. Crust., p. 70. 



1885. — UECOEA, T. B. J. ^ H. IV. Tbird Eep. Foss. PhylL, p. 850 ; 



Geol. Mag., 1885, p. 465. 



A small obscure telson (?), 13 mm. long ; according to Phillips from the Upper 

 Ludlow with Fish-defences [OacM) either near Mathon Lodge, or at Hales End, in 

 the Malvern district ; but according to Salter from the " Ludlow rock of Freshwater 

 East, Pembrokeshire." 



30. Ceeatiocaeis (?) lata, Salter, 1866. 



1866. Htmenocaeis ? lattts, Salter. Mero. Geol. Surv., vol. iii, p. 240. 



1866. Ceeatiocaeis? — — Ibid., p. 294, woodcut fig. 5. 



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

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



1877. — — S. Woodward. Cat. Brit. Foss. Crust., p. 71. 



1885. — LATA, T. B. J. S{ R. W. Third Eeport, p. 351 ; Geol. Mag., 



1885, p. 465. 



The specimen is in the Cambridge Museum (&/299), and shows five (?) 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, perhaps nearest to Hymenocaris. From the Upper-Tremadoc Slate at 

 Garth, east of Portmadoc ; collected by Mr. D. Homfray. 



