﻿LINGULOCARIS SILIQUIFORMIS. 



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1. Lingulocaris lingulsecomes, Salter, 1866. Plate XIV, fig. 4 (?). 



Lingtjlocabis lingul^icomes, Salter. Mem. Geol. Survey (Appendix to Kamsay's 



Geol. North Wales), vol. iii (1866), 

 pp. 253 and 294, pi. x, figs. 1 and 2 ; 

 and 2nd edit, of Ramsay's Geol. North 

 Wales, 1881, p. 485, pi. x, figs. 1, 2. 



— — — Catal. Cambr. Silur. Toss. Cambridge, 



1873, p. 16, woodcut. 



— — Bigsby. Thesaur. Silur., 1868, p. 76. 



— — H. TV. Cat. Brit. Foss. Crust., 1877, p. 76. 



— — H., N., and E. Cat. Cambr. Foss. Mus. Pract. 



Geol., 1878, p. 15 (£). 



— — T. R. J. and H. W. Rep. Brit. Assoc. for 1883 



(1884), p. 223. 



— — Etheridge. Foss. Brit., vol. i, Palaeoz., 1888, p. 58. 



— — Woods. Catal. Type Foss. Cambridge, 1891, p. 136. 



In the Woodwardian Museum at Cambridge are two specimens of a bivalve 

 ("3tt)» there labelled " Mytilocaris lingulsecomes, Salter," from the Upper Tre- 

 madoc slates, Garth, Portmadoc, one of which, seemingly representing the out- 

 side, but somewhat crumpled longitudinally, approximates in its outline and 

 size (l^-xl inch = 32 X 12 mm.) to Mr. Salter's restoration (?), fig. 1, pi. x, and 

 woodcut in ' Cat. Cambridge Foss.,' p. 16. The other is a less perfect internal 

 cast. Otherwise we have not met with any corresponding specimen ; in the Museum 

 of Practical Geology, however, there is an imperfect internal cast showing the 

 dorsal aspect, somewhat deformed by pressure, of a bivalved form (PI. XIV, 

 fig. 4), which may possibly belong to L. lingulcecomes or an allied form, referred to 

 in the ' Catal. M. P. G. Mus. Cambr. Sil. Fossils,' 1878, p. 28, as " Bivalve 

 Crustacean." It is marked d^. From the Upper Llandeilo, near Builth ; in dark 

 flagstone minutely micaceous. 



In the Halifax Museum are specimens of this species from the Upper 

 Tremadoc flags at Portmadoc. 



An imperfect specimen in schistose mudstone from the Upper Tremadoc series 

 at Garth, Portmadoc, in the Museum of Practical Geology, much crushed, marked 

 f , as well as six rather small, crushed, and distorted specimens (§) are referred to 

 L. lingulsecomes at p. 15, ' Catal. Cambr. and Silur. Foss. M. P. G.,' 1878. 



2. Lingulocaris siliquiformis, Jones, 1883. Plate XIV, figs. 1 and 2. 



Lingulocaris lingul.s:comes, Huxley, Newton, and Etheridge. Catal. Cambr. 



Silur. Foss. Mus. Pract. Geol., 1878, p. 15 (£). 



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