98 Prof. T. R. Jones and Dr. H. Woodward— 
In these features this form differs from OC. Bohemica,' Barrande, 
the telson of which is not deeply furrowed on its ventral (under) 
face; and the latter species has longer stylets, oval in section, and 
neatly ridged throughout. 
The Scandinavian specimen occurs, as an impression, in hard black 
shale (‘Brachiopod-Skiffer’) from the Lower Silurian (Upper 
Caradoc) of Westergétland (Westrogothia), a province in the western 
part of the mainland of Sweden. It has been badly figured in 
Angelin’s unpublished ‘Tab. LIII.’ figs. 18 and 19. Fig. 1 is taken 
from a plaster cast. 
2. Ceratiocaris Bouemica, Barrande. Plate V. Figs. 2—6, 10. 
1853. Ceratiocaris (Leptocheles) Bohemicus, Barr. ‘‘ Neues Jahrb. fiir Min.” ete. 
1853, Heft. iii. p. 342. 
1868. Ceratiocaris Bohemicus, Barr., in Bigsby’s ‘‘ Thesaur. Silur.”’ p. 199. 
1872. C. Bohemicus, Barr. ‘Syst. Sil, Bohéme,”’ vol. i. Suppl. p. 447, pl. 19, 
figs. 1-13. 
1885. CO. Bohemica, T.R.J.& H.W. «Third Report on the Paleozoic Phyllopoda,” 
p. 31 (p. 356, Brit. Assoc. Report for 1885) ; and Fifth Report, etc., 1887, 
ae 
In this species the ultimate segment, 50 mm. long, has a linear 
longitudinal ornament of interrupted raised lines. ‘The telson more 
than 112 mm. (44 inches) in length, is ridged and furrowed, and has 
pits (marking the bases of former spines and prickles) along the 
two outer slopes of its dorsal surface. The lower face has a broad 
median furrow and two lateral hollow slopes. The head of the 
telson has a linear ornament like that of the ultimate segment. The 
stylets are ridged and furrowed, and are somewhat oval in section. 
Four specimens (Figs. 2, 4, 5, 6), from the cream-coloured lime- 
stone (Wenlock Shale) of Eksta, Gothland, are portions of the 
shafts of straight, strong styles (telsons), similar to that of C. 
Bohemica, and chiefly from the middle and lower parts of the styles. 
In section these Scandinavian specimens are more equally quadrate 
than in Barrande’s figs. 7 and 9, pl. 19, “Syst. Sil. Bohéme,” vol. i. 
Suppl., and the fluting on the lower face is somewhat different. One 
piece, Fig. 4, is the same as “fig. 5” of Angelin’s unpublished plate 
“Table B.” 
Another piece of telson (Fig. 3) of the same kind as the above, 
shown by a drawing from Stockholm, is from the Sandstone of 
Bursvik, South Gothland (Wenlock Shale). 
A small fragment (Fig. 10) from:Lau, Gothland, in cream-coloured 
fossiliferous limestone (Wenlock), is probably part of a stylet of 
C. Bohemica, comparable with, but much smaller than, figs. 4, 5, of 
Barrande’s pl. 19. It tapers rather rapidly, bears several thin ridges 
on both faces, and is oval in section. 
2**, CERATIOCARIS VALIDA (?), J. & W. Plate V. Fig. 7. 
Monogr. Foss. Phyll. 1888, p. 20. 
This is a fragment of strong thick telson in cream-coloured lime- 
stones, differing from C. Bohemica: (1) in being curved (the 
1 Syst. Sil. Bohéme, vol. i. Supplement, p. 447, pl. 19, figs. 1-13. 
