MACKUROTJS DECAPOD IN THE LOWER CARBONIFEROUS. 871 



(without a carapace), and seven pairs of thoracic legs of a Tetrade- 

 capod." They further consider that it has an analogy with Gamp- 

 sonychus. Other specimens of Anthrapalcemon gracilis, M. & W., 

 show that it departs further in its structure from the type species 

 than was at first supposed. 



1868. Dr. Dawson refigured Diplostylus Dawsoni, Salter, and 

 AmpJiipeltis paradoxus, Salter *. 



1870. Some remains of great interest were described by Mr. H. 

 "Woodward as indicating a gigantic Isopod in the Old lied Sandstone 

 allied to the living Arcturus (Idotea) Baffini, Westwood. To the 

 remains in question, consisting of body-segments ornamented with 

 large tubercles, and portions of aj)pendages, the name of Pramrcturus 

 gigas was given f. 



1870. To Mr. Woodward's intimate knowledge of all that is 

 Crustacean we are also indebted for the solution of some additional 

 obscure remains from the Lower Ludlow, described in a paper by 

 that author, " On Necrogammarus Salweyi, an amphipodous Crus- 

 tacean from the Lower Ludlow of Leintwardine " J. This species 

 is represented by "three laterally compressed and thin crushed 

 somites," with the base of a limb attached to one of them. Necro- 

 gammarus is probably allied to the existing Gammarida\ 



1872. In his " Fifth Report on Fossil Crustacea," Mr. H. Wood- 

 ward considers that representatives of both the Isopoda and Am- 

 phipoda will doubtless be found plentifully in our Palaeozoic rocks §. 



1873. Dr. 0. Feistmantel recorded the occurrence of Gampsony- 

 chus fimbriatus in considerable quantities in the gas-shale of Nur- 

 schen, and gave figures of the specimens j|. 



1877. Dr. Dawson has lately described another species of Anthra- 

 palcemon, under the name of A. (Palaiocarabu s) Hilliana, from a 

 band of black bituminous limestone in the middle division of the 

 S. Joggins Coal-measures. It possesses a short rostrum and large 

 spines at the anterior angles, although there is a reduction in the 

 total number of these when compared with previously described 

 species. There are, in addition, two spines placed in front of the 

 cervical groove %. This paper is accompanied by a note by Mr. H, 

 Woodward on the genus Anthrapalcemon. 



Addenda to Bibliography. 



1854. Yon Schauroth, in the paper previously referred to, " Ein 

 Beitrag zur Palaontologie des deutschen Zechsteingebirges," describes 



* Acadian Geology, 1868, 2nd ed. p. 207, f. 49 ; p. 523, f. 180. 



t " On the Kemains of a Giant Isopod from the Old Red Sandstone, &c," 

 Trans. Woolhope Club, 1870, p. 266. 



J Ibid. p. 271. 



§ Brit, Assoc. Eeport for 1871, p. 54. 



j| " Ueber den Niirschener Gasschiefer, dessen geologiscbe Stellung und 

 organiscbe Eiuschlusse," Zeitschr. deutscb. geol. Gesellscbaft. xxv. p. 503, t. 18. 

 f. 9-11. 



^[ " Note on two Palaeozoic Crustaceans from Nova Scotia," Geol .Mag* 

 Dec. 2, iv. p. 56, f. 1. 



3l2 



