ON THE ANTHRACARID®. 139 
been copied into geological text-books as representing Authrapalemon (see Dana’s Manual of 
Geology, fig. 686 A), does not belong to that genus or the group it represents, but is evidently 
one of the true shrimps or Carididie. The carapace and serrated rostrum, as well as the shape of 
the abdomen, the form of the last pair of uropoda, and the telson, all indicate genuine prawn-like 
affinities. It may be named Archicuris salteri. 
The other Carboniferous shrimps are Crangopsis soliates (Salter, Quart. Journ. Geol. Soc. 533, 
fig. 8, 1861). This appears to be a genuine Caridid; it is from the subcarboniferous beds of 
England. (As synonyms of Crangopsis Salter are Palwocrangon Salter, non Schauroth, and Ure 
nectes Salter. (See Zittels Paleeontologie.) 
Pygocephalus cooperi, of Huxley, from the Carboniferous beds near Manchester, Hugland, is a 
doubtful form, which he refers ‘either to the decapodous or stomapodous 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 Carididie have as yet been discovered in America. The oldest known 
macrurous Crustacean, however, is American, the Palwopalamon newberryi, described by Mr. Whit 
field (Amer. Journ, Se., 33, 1880), from the Upper Devonian of Ohio. 
Explanation of Plate IV. 
Fig. 1. Anthrapalwmon gracilis, M. & W., restored, enlarged 5 times. 
2. cn i) a carapace and eyes, X j. 
3. be ee ee carapace flattened, seen from above x 34. 
4 i Ly Hf part of first thoracic leg, x 4. 
Ly, Uh LG ML four basal joints of the fifth leg, >< 4. 
6. es - a telson and last pair of uropoda, x | to 4. 
All the figures on this plate drawn by Dr. J. S, Kingsley. 
