440 Dr. H. Woodtcard — Crustaceans and Mtjrio2:)ods 



occupied by a strong ridge continuous with the rostrum and ex- 

 tending to the posterior margin, and flanked on each side by a 

 straight or slightly curved lateral ridge extending from the frontal 

 border 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." [Mr. Etheridge thought this form probably possessed a 

 prominent rostrum, but the figures given on his pi. xxiii, op. cit., 

 do not represent anything more than a vei'y slight double spine.^] 



"Flagella of the antennas bent obtusely outwards, composed of 

 numerous minute subdivisions. Antennee having a peduncle or 

 protopodite of four segments, and terminating in two slender 

 filamentous whips. First pair of chelate appendages probably 

 present, small, elongate. Eyes large and reticulated. Abdominal 

 segments six in number, with pointed pleurae'- and a well-marked 

 central line extending throughout their whole length, and corre- 

 sponding 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." 



I do not think I need add a further description to that by 

 Mr. Etheridge. The impressions left by the rather large eyes, the 

 basal joints of the antennules, and the outer antennee, with portions 

 of their flagellae, can be made out. The small limbs are not pre- 

 served in this specimen, nor the chelate anterior pair. 



Length of Mr. Whalley's specimen 65 mm., length of cephalo- 

 thorax 33 mm., breadth 22 mm., length of five abdominal somites 

 20 mm., length of second abdominal segment 7 mm., length of caudal 

 plates 10 mm. (probably longer). 



Locality and horizon : Colne Hill, Soapstone bed, Lower Coal- 

 measures. Original specimen in Mr. Peter Whalley's collection. 



3. ANTHRAPALiEMON Traquairii (?), Peach. 

 Trans. Eoy. Soc. Edinburgh, 1880, vol. xxx, pt. 1, p. 80, pi. x, figs. 5a-f. 



In Mr. Whalley's collection is a rather large Arthropod, probably 

 referable to Dr. Peach's species A. Traquairii, from the Lower 

 Carboniferous rocks of Eskdale. The specimen is \e\-y obscure, and 

 I have therefore not figured it ; but a brief note may serve to 

 record it, and to stimulate further research, which it may be hoped 

 will result in the obtaining of moi'e perfect material for study. 



The whole animal measures 8|^ cm. in length, by 2 cm. in breadth. 

 The carapace is 3^ cm. long, and appears to have slipped forward 

 in the matrix (when soft) exposing 2 cm. length of the uncovered 

 thoracic region with the imperfectly preserved thoracic limbs; behind 

 these, again, are the traces of the five abdominal somites ; the nodule 



1 The presence of a rostrum is not confirmed by Mr. Whalley's specimen, and 

 I am doubtful ■whether this species had a prominent rostrum. 

 - The pleurae cannot be seen in Mr. Whalley's specimen. 



