468 R. ETHERIDGE ON SPECIES OF ANTHRAPALZMON 
It will be within the recollection of those interested that the type 
specimen of A. Woodwardi, found by Mr. James Bennie at Belhaven 
Bay, near Dunbar, was in any thing but a good state of preservation, 
contained in an ironstone nodule. Mr. Macconochie’s specimens, on 
the other hand, are in a Cement-stone, and are preserved in a par- 
ticularly good state for examination ; they will enable me to define 
the species in a much more accurate manner, to make a few correc- 
tions in my former description, and several additions. 
The second species, A. Macconochii, of which the remains are 
abundant, 1s manifestly so different from A. Woodwardi, although 
allied to it, as well as from the other species of the genus, A. Giros- 
sarti, Salter, A. dubius, Prestwich, A. Russellianus, Salter, and 
A.? gracilis, Meek and Worthen, that I do not hesitate to designate 
it by a distinct name. The following is a detailed description of the 
two species. 
ANTHRAPALZMoN Woopwarpt, R. Etheridge. (Pl. XXIII. figs. 4-9.) 
Anthrapalemon Woodwardi, R. Eth. Quart. Journ. Geol. Soc. 1877, 
xxx. p. 872, t. 27. 
Sp. char. Carapace oblong, narrowing towards the anterior part, 
and divided into two unequal portions by the cervical groove, the 
posterior being the largest ; relative convexity unknown. Anterior 
lateral margins not spinous and without serrations ; posterior lateral 
angles rounded ; posterior margin concave. Cervical groove strongly 
marked and widely V-shaped. Middle line of the carapace occu- 
pied by a strong ridge continuous with the rostrum and extending 
to the posterior margin, and flanked on each side by a straight or 
slightly curved lateral ridge extending from the cervical groove to 
the posterior margin. Like the central one, these ridges are 
minutely crenulated. That portion of the carapace anterior to the 
cervical groove is crushed, and cannot satisfactorily be made out; 
but it was undoubtedly produced into a rostrum continuous with the 
central line of the carapace, and narrowing rapidly towards the 
front. Flagella of the antenne bent obtusely outwards, of nume- 
rous minute subdivisions, Antenne having a peduncle or protopo- 
dite of four segments, and terminating in two slender filamentous 
whips. First pair of chelate appendages probably present, small, 
elongate. yes large and reticulated. Abdominal segments (as in 
the generic character) six in number, with pointed pleurz and a 
well-marked central line extending throughout their whole length, 
and corresponding with the central ridge of the carapace; articular 
area small, but distinctly visible, defined by a small transverse ridge 
on each segment. Telson primarily consisting of a central hastiform 
plate, flanked on each side by two lateral caudal swimming-lobes, 
which arise from and are articulated to the sixth segment of the 
abdomen. 
Obs. The additional light thrown upon this species by the dis- 
covery of the present specimens renders some alterations in my pre- 
vious description * necessary. On the one hand certain statements 
* Quart, Journ. Geol. Soc. xxxiii. p. 872. 
