HYMENOCARIS LATA. 79 



§ 2. Body-segments. 



9. Eight body-segmeuts, of large size, without caudal appendages (PI. XIII, 

 fig. 7). Much compressed, thereby having greater height than originally. In 

 bluish-grey slaty flagstone with rusty facing, squeezed. Lingula-flags ; Cae'n- 

 y-coed, near Maentwrog. 



Cambridge Museum (j^ -jly. D. H.). 



Referred to in ' Report Brit. Assoc' for 1883 (1884), p. 221. 



10. Five body-segments, with portions of the tail-spines on the last (PI. XIII, 

 fig. 14), somewhat crumpled by oblique pressure. In light bluish-grey schistose 

 mudstone with rusty facings. Borth, Portmadoc. 



British Museum, I 322. 



11. Six (?) body-segments, with remnants of the tail-spines (PI. XIII, fig. 8). 

 In dark-grey slaty mudstone, minutely micaceous, squeezed. Portmadoc. 



Museum Pract. Geol., marked 2^; Wyatt-Edgell Coll. ' Catal. Cambr. Sil. 

 Foss.,' 1878, p. 10. 



12. The last three body-segments, with the six caudal appendages well 

 exhibited (PL XIII, fig. 9). Magnified 2^ diameters. This is the same specimen 

 as that figured in the ' Mem. Geol. Siu-v.,' vol. iii, pi. v, fig. 25. In dark-grey 

 slaty mudstone, Lower Lingula-flags ; Moel-y-gest, Tremadoc. 



13. Two groups of narrow body-segments, separate from their carapaces. 

 PI. XIII, fig. 10 shows eleven (?) joints, five or six of which seem to have been 

 soft, round, and indistinct, whilst five or six were harder, more angular, distinct, 

 and terminated with caudal spines. Fig. 11 shows 15 (?) segments, separated, 

 distorted, and possibly not all belonging to one and the same animal. In dark- 

 grey slaty mudstone with Lingulse, squeezed. Lingula-flags ; Gareg-felen, D. H. 

 The Owens College, Manchester. 



The gradation in size of the abdominal segments from fig. 7 to figs. 1, 12, 2, 

 3, 14, and 4, and to figs. 5, 8, 10, 11, and 9 (x 2^), may be accounted for by 

 relative age alone. 



2. Hymenocaris ? LATA, Salter, 1866. Fig. 4 (woodcut). 



Htmenocaeis ? LATU3, Salter. Mem. Geol. Surv., vol. iii, 1866, p. 240 (in list). 

 Ceeatiocaeis ? LATHS, Salter. Ibid., p. 294, woodcut 5 ; 2nd edit., 1881, p. 486, 



woodcut 5. 



— — Salter. In Siluria, 1867, p. 516. 



— — Salter. Catal. Cambr. Silur. Poss., 1873, p. 16. 



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



— — T. B. J. and R. W. Geol. Mag., 1885, p. 465. 



— — — Ibid., 1886, p. 460. 



