H. Woodward's Report on Fossil Crustacea. 565 



It measures 1^ inches in length and If of an inch across the 

 carapace. 



The nuchal suture is straight (not semicircular, as in Feltocaris), 

 and it has a well-marked dorsal suture, which again separates it 

 from Discinocaris, in which the dorsal suture is absent. 



I name this species AiJtycliopsis Wilsoni, after its discoverer. 



Another and more oval-formed but equally perfect carapace of a 

 smaller species, from the Moffat Anthracitic Shales, measuring 8 

 lines long by 7 lines broad (having the triangular cephalic plate in 

 situ), I have named Aptichopsis Lapivorthi, after Mr. Lap worth, who 

 has devoted so many years to the investigation of the geology of 

 G-alashiels and the surrounding district. 



A third species, very distinct from the foregoing two, obtained 

 from the Buckholm Beds (which is finely striated concentrically, 

 and is 7 lines in diameter), I have named AphjcJiopsis glabra. 



There are several other examples from this rich locality, includ- 

 ing specimens of Feltocaris aptyclioides, species of Dithyrocaris, 

 Ceratiocaris and portions of the scale-marked integument of 

 JPterygotiis. 



I have lately received from Mr. Thomas Birtwell, of Padiham, 

 Lancashire, two specimens of a new Limuloid crustacean, in which 

 all the thoracico- abdominal segments are welded together into one 

 piece, as in the modern Limidus, but without any trace of seg- 

 mentation along the margin. 



The head-shield is also smooth, the compound eyes are small, but 

 the larval ocelli are very distinctly seen, and are almost as large as 

 in the modern king-crabs. The specimen is only 8 lines wide and 

 8 long, it is remarkably convex in proportion to its size. I have 

 named it after its discoverer Frestioicliia Birtwelli. (See Geol. Mag., 

 1872, Vol. IX., p. 440, PL X., Figs. 9, 10.) 



Another new Limuloid crustacean, specimens of which have been 

 obtained from the Dudley Coalfield, and also from Coalbrookdale, 

 has the five thoracic segments free and movable (as in Bellinurus 

 hellulus of Konig), but the pleuras are bluntly acuminate, not finely 

 pointed, as in B. hellulus, and the head-shield is not armed with long 

 and pointed cheek-spines, as in that species. ' 



I propose to name it Bellinurus Konigianus, after the distinguished 

 author of the '•' Icones Fossilium 6'ectiles," formerly Keeper of the 

 Mineral and Fossil Collections in the British Museum. (See Geol. 

 Mag., 1872, Vol. IX., p. 439, PL X., Fig. 8.) 



Of foreign Paleeozoic Crustacea, a remarkable new Trilobite (ob- 

 tained by Dr. W. G. Atherstone, of Graham's Town, Cape Colony), 

 from the Cock's Comb Mountains, South Africa, deserves to be 

 noticed here. It is a new and elegant species of Encrimtrus 

 (measuring three inches in length), preserved in the centre of a 

 hard concretionary nodule, which has split open, revealing the 

 Trilobite itself in one piece and a profile of it on the other. The 

 profile shows that each of the eleven free body-segments was anned 

 with a prominent dorsal spine nearly half an inch in length, whilst 

 the pygidium was similarly terminated by an even longer spine, 



