202 Bibliographical Notices. 
(1862) that Von Heyden discovered the ephippium of a Daphnia in 
the Rhenish Brown Coal (Gersticker, in Bronn’s Klass. u. Ordn.), 
said by Lyell to be of Eocene age. It should be noticed, however, 
that the fossil belongs to Sida, the most highly organized genus of 
the group; and as it is not unlikely that such pelagic forms as 
Evadne may have existed in the Mesozoic seas, if not earlier, I have 
ventured to run the point of the wedge into the Carboniferous 
period * [in the diagrammatic table of the vertical range of the 
Crustacea, p. 361 ]. 
“The Apodide date back to the early part of the Mesomall a 
Triassic species of Apus having been found in Europe, according to 
Mr. Salter.” 
With reference to the fossil Phyllopods, Mr, Packard adds, at 
p. 446 :— 
‘“¢ While the posterior edges of the abdominal segments in Hyme- 
nocaris appear to be spined, as in Nebalia, there are some character- 
istics of importance in the fossil forms which deserve mention. 
These are the sculptured carapace, especially of Dictyocaris, in 
which the surface is reticulated. [A reticulate structure is obsery- 
able in the parenchyma or soft part of the shell of Nebalia, although 
the exterior is smooth (note at p. 446). | 
“ Moreover the size of these genera was enormous; but if we, as 
we seem to be warranted in doing, regard Nebalia as a survivor and 
decrepit or old-age type of the order, which has lost the ornamen- 
tation of the integument, the size, and the telson even, being 
dwarfed, smooth-skinned, and in general very simple compared with 
the forms which existed at the time when the type culminated and 
before it began to die out, we may have an explanation of the greater 
simplicity of the carapace and abdomen of Nebalia, as compared 
with its Paleozoic ancestors.” 
III. The Geographical Distribution of the Phyllopoda (pp. 362- 
370), illustrated with a coloured map, deals with 
a. American Arctic Province. 
6. Atlantic or Eastern Province. 
, : | ¢. Central Province. 
1. The American Region. . < d. Californian or Pacific Province. 
| e. Antillean Province. 
\ f. South America. 
( a. European Province. 
| 1. Western Europe. 
2. The Europxo-Asiatic z 2. Eastern Europe. 
Region: . 5.02... << | 6. Mediterranean Province. 
| ¢. Siberian Province. 
| d, Manchurian Province. 
3. The Indo-African Realm: a. African, and 6, Indian Region. 
4. The Australian Realm. 
* Possible Daphnioid remains are referred to in the Geol. Mag. vol. vii. 
p. 219 (1870), as having been found in the Coal-measures cn South 
Wales; and notice is there taken also of somewhat similar organisms, 
shown by woodcuts (figs. 10 and 11) in Kmmons’s ‘ American Geology, 
part 6, pp. 39 and 40 (1859), and referred by him to Entomostraca. 
