154 Mr. I. Chapman on some 
PrRiMITIOPSIS, Jones [1887]. 
Primitiopsis planifrons, Jones. 
Primitiopsis planifrons, Jones, 1887, Silur. Ostrac. Gothland, p. 5, 
woodcuts; Jones, 1888, Ann. & Mag. Nat. Hist. ser. 6, vol. i. p. 406, 
pl. xxii. figs. 1 a-d. 
Somewhat like a long Primitia with the reticulate orna- 
ment of P. ornata. he anterior border, however, is more 
pronounced, and the front part of the interior is partitioned off 
by a thin cross-wall. 
Silurian; Mulde, Gotland. Frequent. 
CYPRIDIDA. 
Family Cypridide. 
Pontocy pris, G. O. Sars [1865]. 
Pontocypris Mawit, Jones. 
Pontocypris Mawii, Jones, 1887, Aun. & Mag. Nat. Hist. ser. 5, vol. xix. 
p. 182, pl. iv. figs. 4 & 7; Krause, 1891, Zeitschr. deutsch. geol. 
Gesellsch. p. 512, pl. xxxiil figs. 8a, b. 
Our specimens are exactly comparable with those figured 
by Prof. Rupert Jones from Frdjel in Gotland. 
Silurian; Mulde, Gotland. Rare. 
Pontocypris Mawtt, var. proxima, Jones. 
Pontocypris Mawii, var. proxima, Jones, 1889, Ann. & Mag. Nat. Hist. 
ser. 6, vol. iv. p. 269, pl. xv. figs. 5a, d. 
A specimen occurs in our series which closely resembles 
the variety provima. Prof. Jones records it from Wisby in 
Gotland. 
Silurian ; Mulde, Gotland. 
Family Bairdiida. 
Macrocypris, G. 8. Brady [1867]. 
Macrocypris siliquoides, Jones. 
Macrocypris siliquoides, Jones, 1887, Ann. & Mag. Nat. Hist. ser. 6, 
vol, xix. p. 181, pl. v. figs. 9 a-c. 
This species is rare at Mulde. It has been recorded from 
the Wenlock Shales. 
Silurian ; Mulde, Gotland. 
