MACEUROTJS DECAPOD IN THE LOWEE CAEBONIFEEOUS. 865 



considered to have the closest analogy with the Amphipoda, and is 

 described as possessing a free head, and from twelve to fourteen 

 body-segments, with fringed caudal appendages attached to the 

 telson. The eyes are sessile ; and there are two pairs of antennae, 

 an inner and an outer. The first pair of appendages preserved in 

 the specimen is remarkable for strength and distinctness of the 

 joints, which are apparently five. The structure of this Crustacean 

 is described at considerable length. 



1848. Dr. H. G. Bronn entered in his Catalogue the two following- 

 forms * : — 



Apus dubius, Prestwich : p. 90. 



Bostrichopus antiquus, Goldfuss : p. 172. 



1848. Herr E. Eichter described from the " Grauwacke " of the 

 Saalfeld neighbourhood (? Upper Devonian), a badly preserved 

 Crustacean, under the name of Gitocrancjon granulatus, which, he 

 considered, showed a transition from the Macrura to the Bra- 

 chyura f . The carapace is divided into three chief regions by two 

 transverse divisions, the foremost of. which forms a deep sulcation 

 backwards on the anterior part of the carapace. The posterior edge 

 of the latter is excavated for the reception of the body-segments, 

 which are seven in number. The telson (if the three longitudinal 

 folds can be so called) is small and inconspicuous. 



1848. In a review of Dr. H. Jordan's preceding paper, " Ent- 

 deckung fossiler Crustaceen im Saarbriicken'schen Steinkohlen- 

 gebirge," the writer considers that the analogies of Gampsonyoc jim- 

 briatus should be sought for amongst the long-tailed Decapods 

 rather than the Amphipoda %. 



1850. Dr. H. G. Bronn, in a paper " Ueber Gampsonyoc jimbriatus 

 (Jordan) aus dem Steinkohlen-Formation von Saarbriicken und dem 

 Murg-Thal " §, pointed out that the fore part of the body was 

 segmented, and not coalesced into a cephalo thorax, and that, irre- 

 spective of head and tail, there are fourteen segments. He con- 

 sidered this Crustacean to be an Amphipod or Isopod, but pos- 

 sessing more the characters of the former, whilst the five-lobed 

 telson, amongst other peculiarities, points to the Macrura. 



1852. Dr. A. Quenstedt, in his useful ' Handbuch der Petrefac- 

 tenkunde,' gave a figure of Gampsonyoc, and placed it amongst the 

 Isopods || . 



1854. In the second edition of Prof. Morris's ' Catalogue of 

 British Fossils,' Mr. J. W. Salter summed up the known species of 

 British Carboniferous Macrura % as follows : — 



Apus dubius, Prestwich, Geol. Trans. 2nd ser. vol. v. pi. 49. f. 9. 

 ? Cancer, sp., Ick, Quart. Journ. Geol. Soc. 1845, i. p. 199. 



* Index Pal. Noinenclator. 1848. 



t Beitrag zur Palaontologie des Thuringer Waldes; Die Grauwacke des 

 Bohlens und des Pfaffenberges bei Saalfeld. I. Fauna : 4to, p. 43, pi. 1. figs. 1-4. 

 \ Neues Jahrbuch, 1848, p. 126. 

 § Ibid. 1850, p. 575. 

 If P. 277, pi. 21. f. 7. 



IF p. in. 



