* On the Paleozoic Bivalved Entomostraca. 267 
snout than the extremity of the caudal. Anal, in the male, 
in the anterior third of the total length, half as long as head 
and body without caudal fin. ‘Twelve or thirteen scales on 
the median line between the interorbitalspace and the first 
dorsal ray. Caudal fin as long as the head. Pale brown, 
the scales edged with darker ; six to eight vertical black lines 
on each side of the tail. 
Male 25 millim. long, female 42. 
Numerous specimens, from Rio Grande do Sul. 
XX XIV.—Notes on the Paleozoic Bivalved Entomostraca.— 
No. XX VIII.* On some Scandinavian Species. By Prof. 
T. Rupert Jones, F.R.S., F.G.S., &e. 
[Plate XV.t] 
SEVERAL fossil Cypridiform Ostracods, such as Macrocypris, 
Pontocypris, and Bythocypris, from the Upper-Silurian strata 
of Shropshire, were described and figured in the Ann. & Mag. 
Nat. Hist. ser. 5, vol. xix. (1887), pp. 178-189, plates iv.— 
vi.; and a few species similar to some of the above-men- 
tioned, and of like age, but from Scandinavia, were treated of 
op. cit. ser. 6, vol. i. (1888), pp. 396-398, pl. xxii. figs. 1-3. 
Since then my friend Prof. Gustav Lindstrém, of Stock- 
holm, has sent to me for examination a series of Ostracoda ¢ 
from a red clay near Wisby, which is referred to in the 
column marked “a” in Prof. G. Lindstrém’s Table of 
Formations, at p. 8 of my ‘ Notes on some Silurian Ostracoda 
from Gothland,’ 8vo, Stockholm, 1887, and is there termed 
the ‘ Oldest red shale beds with Arachnophyllum,” at the 
base of the Stricklandinia-marls. They are regarded as 
being on the horizon of the Llandovery formation in England, 
homotaxially a little below the Upper Llandovery §. 
* No. XXVII. appeared in the Ann. & Mag. Nat. Hist. for May 1889, 
pp. 373 &e. 
+ This Plate has been drawn with the aid of a grant from the 
Royal Society for the illustration of the fossil Ostracoda. 
} Mr. C. Davies Sherborn, F.G.S., has helped me in sorting and 
comparing these little specimens. 
§ The provisional list of these Wisby species, given at p. 410, Ann. & 
Mag. Nat. Hist. June 1888, is now modified as follows :— 
Beyrichia Kledeni (with hypertrophied front lobe). 
Aparchites, three species. 
Macrocypris, one species. 
Pontocypris Mawii, three varieties. 
Bythocypris, six species and varieties. 
Lately Professor G. Lindstrém has forwarded for my examination some 
