i 
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ON THE FOSSIL PHYLLOPODA OF THE PALHOZOIC ROCKS. Sok 
This is a small obscure style (?), 15 mm. long, from the Ludlow beds, 
of Freshwater-EHast, Pembrokeshire. 
B. Doubtful Genera. 
16. Crratiocaris (?) ENSIS, Salter. 
1860. Ceratiocaris? ensis,Salter. ‘Ann. Mag. N. H.’ ser. 3, vol. v. p. 159. 
1867. = 53 - In ‘Siluria,’ 3rd edit. p. 516. 
1877. “a s H. Woodward. ‘Catal. Brit. Foss. Crust.’ Deke 
In the Grindrod Collection, Oxford Museum, specimen O, we find the 
original fossil described by Mr. Salter in 1860, namely, a large telson, 
nearly 6 inches long, lying on its side and flattened, bulbous at its base, 
sword-shaped, with an incurved apex, a crenatoserrate convex dorsal 
margin, and flat sides with sub-central lateral rib (originally lozenge- 
shaped in section). From the Lower Ludlow at Leintwardine, near Lud- 
low. Not quite perfect at point, itis 145 mm. long; 16 mm. broad at the 
bulb, and 13 mm. below it. We have to add that along and close to the 
inner (concave) edge there is a multiple row of pits (= small spines or 
prickles), in threes and fours obliquely set, along the upper half, below the 
bulbous portion ; and these die out downwards in a less regular, thinner, 
and more scattered series. Casts of parasitic Polyzoa (?) cover the bulb 
and occur here and there on the spine. The arrangement of the pitting 
along the concave edge may indicate a distinct generic relationship. It 
reminds us of Barrande’s C. debilis, as figured in his ‘ Sil. Syst. Bohéme,’ 
yol. 1. Suppl. pl. 18, figs. 26-28, and pl. 31, figs. 16-19. 
There is another similar but much less distinct specimen, in the same 
Collection, from 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, . = 53 In ‘Siluria,’ 3rd (4th) edit. p. 516. 
1873. > 5 3 ‘Cat. Camb. Sil. Foss.’ p. 16. 
1877. a ‘3 H. Woodward. ‘Cat. Brit. Foss. Crust.’ p. 71. 
The specimen is in the Cambridge Museum (6/299 ?), and shows 5 (?) 
abdominal segments crushed endwise, so as to be shortened (12 mm.) and 
widened (28mm.). The woodcut referred to is a restoration. The specific, 
and even generic, relationship is obscure. From the Tremadoe Slate, at 
Garth, east of Portmadoc ; collected by Mr. D. Homfray. 
18, Crrariocaris (?) INSPERATA, Salter. 
1866. Ceratiocaris ? insperatus, Salter. ‘ Mem. Geol. Surv.’ vol. iii. p. 295. 
1867. i ne A In ‘Siluria,’ 3rd (4th) edit. p. 516. 
1873: * * >. ‘Cat. C. 8. Foss.’ p. 16. 
1877. - i H. Woodward. ‘Cat. B. F. Crust.’ p. 71. 
_In the Cambridge Museum (a/275). Obscure remnant of an ultimate 
abdominal segment, with clear indications of a trifid appendage ; the 
telson or central spine seems to be the longest, but all three are broken 
off above their points. The telson is about 35 mm. long. From dark- 
grey shales between the Lower and Upper Tremadoc Slates in a railway- 
cutting above the village of Penmorfa, Portmadoc. Collected by Mr. 
D. Homfray, Mr. Salter thought that it belonged to the same species as 
the foregoing, 
