ON THE ANTHKAGAlilD.^. 139 



beeu copied into geological text-books as represoutiug Antbiapala'iiioii (see Dana's Manual of 

 Geology, fig. 686 A), does not belong to tbat genus or the giouj) it represents, but is evidently 

 one of the true shrimps or Carididaj. The carapace and serrated rostrum, as well as the shape of 

 tlio abdomen, the form of the last jiair of uropoda, and the tclson, all indicate genuine prawn like 

 affinities. It may be named Archkaris saltvri. 



The other Carboniferous shrimps are Vrdngopsis soliaies (Salter, Quart. Jouni. (Jeol. Soc. 533, 

 fig. 8, 1861). Tliis appears to be a. genuine Caridid; it is from the subcarbonifciuus beds of 

 England. (As synonyms of Criingopsis Salter are Pakeocraiifioii Saltei', non Schaurotii, and i'ro- 

 nectes Salter. (See Zittel's Palaeontologie.) 



Pj/goeephal us cooperi, of Huxley, from the Carboniferous beds near Manchester, England, is a 

 doubtful form, which he refers "either to the decapodons or stomaj)odous group of the class.' 

 (Quart. Journ. Geol. Soc, xiii, 363, 1857; xviii, 420, 1862). Professor Dana (Manual of Geology, 

 3d edit., p. 350) regards this form as a Schizopod. 



No Carboniferous Caridid;e have as yet been discovered in America. The oldest known 

 macrurous Crustacean, however, is American, the PaUeopakemon newh^rryi, described by ^Mr. Wliit- 

 field (Amer. Journ. Sc, 33, 1880), from the Upper Devonian of Ohio. 



Explanaiion af i'liite IV. 



Fig. 1. AnthrapaJoemon graciUs, M. & W., restored, eulargeil 3 times. 



2. " " " carapace and eyes, X t- 



3. " " " carapace flattened, seen from above x 31. 

 4 " " " part of first tlioracic leg, x f . 



5. " " " four basal joints of tlie fifth leg, x ^ 



6. " " " telson and last pair of uropoda, X f to f. 



All the iigares ou this plate drawn by Dr. J. S. Kiugsley. 



