IN THE LOWER CARBONIFEROUS SERIES OF SCOTLAND. 465 
of the Wardie Shale specimen being a Dithyrocaris; for there body- 
segments, tail-spines, and portions of the carapace occur in pro- 
fusion. The discovery of this genus in the Lower Carboniferous 
series by Messrs Henderson and Macconochie is a point of much 
interest; and its occurrence in the Wardie Shale beds will form a 
welcome addition to the fauna described in my paper on. that sub- 
ject *. The following are detailed notes on the specimens. 
Ditnyrocaris, sp. ind. 
Obs. The specimen found by Mr. Henderson is specifically unde- 
terminable, at any rate with our present imperfect knowledge of 
the species of Dithyrocaris. It consists of the impressions of four 
body-segments, and perhaps portions of two others, crushed side- 
ways. They are in form almost quadrangular above, tapering 
below ; there is no trace of the tail-spines. Scattered over and 
around the specimens are an immense number of small, circular, 
crushed, disk-like bodies, some adhering to the segments, others in 
close proximity to them. 
At first sight these little disks might be referred to the sporangia 
of some Lycopodiaceous plant, such as Lepidodendron, Flemingites, 
or Tasmanites ; but in their present state it is difficult to express an 
opinion on their naturet. Dr. Woodward does not think they 
have any organic connexion with the crustacean segments. 
Loc. and Horizon. Woodhall, Water of Leith, near Edinburgh, 
in the Wardie Shale section of the Cement-stone group, L. Carbo- 
niferous or Calciferous Sandstone series. 
Coll. Museum of Science and Art. 
Collector. Mr. John Henderson. 
Dirayrocarts TEstupinevs, Scouler. (Pl. XXIII. fig. 1.) 
Argas testudineus, Scouler, Records of Gen. Science, 1835, 1. 
p. 136. 
Dithyrocaris Scoulerit, M‘Coy, Synop. Carb. Foss. Ireland, 1844, 
Dp: Wa. bh: 25. 1. 2. 
D. testudineus, Morris, Cat. Brit. Foss. 2nd ed. 1854, p. 107; 
Woodward & Etheridge, Brit. Assoc. Report for 1873, pt. 2, p. 92; 
Woodward & Etheridge, Mem. Geol. Survey Scotl. Expl. 23, 1873, 
p- 98; Woodward & Etheridge, Geol. Mag. 1873, x. p. 482, t. 16. 
f. 1; Woodward, Cat. Brit. Foss. Crust. 1877, p. 73; Bigsby, The- 
saurus Dey.-Carb. 1878, p. 249. 
Obs. This species is represented in the collection from Roxburgh- 
shire by two half carapaces. The narrow, strongly and obliquely 
fringed lateral margins are quite visible ; and in one of them there 
is also to be seen the commencement of one of the rounded ridges 
within the margins, which gradually turn inwards. On the other 
* “On our Present Knowledge of the Invertebrate Fauna of the Lower Car- 
boniferous or Calciferous Sandstone Series of the Edinburgh Neighbourhood, &e.,” 
Quart. Journ. Geol. Soc. xxxiv. p. 1 
+ Is it possible that they are the remains of ova adhering a the Bg ? 
K 
