BIBLIOGRAPHY OF THE MEROSTOMATA. 29 
judgment in assigning them to the antenn or antennules; and they supported my own 
view, too, as to the existence of three pairs of appendages to the head, exclusive of the 
chelz and the large swimming-feet, which are also, as we learn from the new and more 
perfect specimens found, both in America and Russia, included with the appendages of 
the mouth. 
“The chief new points, I take it, in Prof. Hall’s beautiful series are, first, the larger 
number of joints in the great maxillary appendages than was supposed from analogy with 
Pterygotus, where there are certainly only seven; and, secondly, the existence of ocelli on 
the dorsal surface of the shield, such as give it a wonderfully Limuloid aspect. But some 
of the Copepoda have similar ocelli; and as to the affinities, it would be out of place in 
every way to give my opinions when the naturalist is by who first truly studied these 
relations. Whatever corrections better specimens may have led to, the main credit is due 
to him who from fragmentary materials constructed a true hypothesis.” 
Mr. Salter describes” /#. pulicaris from the Devonian of St. John’s, New Brunswick ; 
a fragment of a species allied to #. Scouleri, from the Coal-measures, Port Hood, 
Cape Breton; part of the telson of a Lurypterus (?) from Coal-measures, Nova Scotia. 
He also gives” a fresh description (without a figure) of 2. Scouleri, Hibbert, and 
figures and describes 2. (Arthropleura ?) mammatus and E. (Arthropleura) ferow, the 
first from Kirkton, Bathgate; the second from Pendleton Colliery, near Manchester ; the 
third from the (Penny-stone ?) Ironstone, Coal-measures, North Staffordshire. 
52. 1863. Mr. W. H. Batty” gives a more complete account of the new Limuli 
from the Irish Coal-measures, and good figures of Belinurus regine and B. arcuatus. 
53. In November, 1863,” a notice appeared by the author, with figures, of Simonia 
(Pterygotus) acuminata, in which he showed the propriety of placing’this species in a dis- 
tinct genus (as proposed by Mr. David Page), and pointed out many important characters 
by which it is at once separable from Plerygotus. 
54. In 1864 the author described and figured” Hurypterus lanceolatus, Salter, from 
Lanarkshire, only imperfectly known before. 
55. In the same year he exhibited specimens and restored figures of Stylonurus, Plery- 
gotus, Slimonia, Hurypterus, and Hemiaspis, before the British Association,” Bath ; and 
in November he published® descriptions and figures of Stylonurus Logani, Styl. ensiformis, 
Eurypterus Brewsteri, and Pterygotus minor, and likewise gave a list of all the then 
known British species, with localities.” 
56. In 1865 Sir Cuaruus Lyrii™ published an amended figure of Pterygotus 
Anglicus, to supersede that which had been designed by Prof. M‘Coy. 
57. In November of the same year the Geological Society® published the author’s 
descriptions of Stylonurus Scoticus and Stylonurus Powriei from the Devonian of Forfar- 
shire, and Hemiaspis limuloides from the Lower Ludlow Rock, Leintwardine. 
or 
