464. R. ETHERIDGE ON THE GENUS DITHYROCARIS 
36. On the OccuURRENCE of the Gunus Dirmyrocaris in the Lowrr 
CARBONIFEROUS or CALCIFEROUS SANDSTONE SERIES of SCOTLAND, 
and on that of a Seconp Species of ANTHRAPALABMON in these 
Brps. By R. Ernermes, Hsq., Jun., F.G.S. (Read April 30, 
1879.) 
(Published with the permission of the Director-General of theGeological Survey.) 
[Prats XXIII] 
1. Lyrropvcrion. 
Sivcz my connexion with H.M. Geological Survey ceased I have 
been allowed by Prof. Geikie, F.R.S., to make use of some very 
interesting Crustacean remains collected during the progress of the 
Survey work, and now beg to offer some remarks upon these 
specimens. I take this opportunity of expressing my thanks to 
Prof. Geikie for granting me this privilege. I am also indebted to 
Dr. Traquair, F.G.S., for the loan of one of the specimens described 
hereafter. 
2, On THE OccURRENCE OF DITHYROCARIS IN THE CALCIFEROUS 
SANDSTONE SERIES. 
The genus Dithyrocaris has hitherto been met with in the Scotch 
Carboniferous system, so far as | am aware, only in the Carboni- 
ferous Limestone group proper. The Phyllopods of the Calciferous 
Sandstone series (= Tuedian beds), or lower section of the Scotch 
Carboniferous, consist up to the present time of three species, viz. :— 
Estheria Peachii, Jones*; Leaia, sp.~; and Estheria Dawsoni, 
Jonest. I know of no other form recorded from this series of 
rocks §. 
Some months ago Dr. R. H. Traquair, F.G.S., called my attention 
to a specimen in the Edinburgh Museum, found by Mr. J. Hender- 
son in the Wardie Shale beds of the Water of Leith, consisting of 
several semidetached segments of a large crustacean, which, from 
their general resemblance to those of the Phyllopoda, I conceived 
were probably the remains of Dithyrocaris or an allied genus. 
Shortly after this discovery my duties in connexion with the Geo- 
logical Survey led me to examine a collection of Lower Carboni- 
ferous fossils made in Roxburghshire by Mr. A. Macconochie, one 
of the Survey collectors. The specimens of Crustacea obtained by 
Mr. Macconochie are of great interest, and my thanks are specially 
due to him for his kindness in immediately calling my attention to 
them. - 
The evidence contained in this collection is entirely confirmatory 
* Geol. Mag. vii. p. 220. 
+ Ibid. vii. p. 96. Peach, Brit. Assoc. Rep. for 1871, pt. 2, p. 109. 
{ Etheridge, Geol. Mag. dec. 2, 1876, iii. p. 576. 
§ Leata Jonesit has since been described (Ann, & Mag. Nat. Hist., April 1879). 
