73 



This family is by Dr. M. Edwards placed among the Oey- 

 podes, but is here coupled with Gonoplax, from the great 

 similarity of form and habit of the following Species. 



In the history of Crustaceans by Dr. M. Edwards, no notice 

 is given of any species of this genus as found in the European 

 seas; and therefore I feel some hesitation in assigning to it a 

 species frequently found in the stomachs of fishes taken in 

 depths varying from 5 to more than 20 fathoms ; but of which 

 no figure is found in the works of Pennant or Leach. 



The form of the carapace is represented by Dr.M.E Iwards, 

 pi. 18, fig. 10, and consequently much resembling that of 

 Gonoplax ; but that of the present species differs from the 

 figure by that geutleman in possessing a second well marked 

 book on the lateral margin, a little behind the anterior angle, 

 and at the place where in the Gonoplax Bispinosa there is a 

 protuberance much less marked, but giving origin to the tri- 

 vial name. Both claws are of equal size, and less than the 

 transverse breadth of the carapace. The eye stalks are con-? 

 cealed, in the manner of the gonoplax : but as the carapaco 

 is more advanced at the separation of the occular cavities, 

 when withdrawn their extremities point a little backward. I 

 find but little difference in the form of the male ami female, 

 and none in the proportions of the claws, though such is the 

 case for the most part in Crustaceans. I have provisionally 

 designated it: 



G. Bellii, Couch's M.S. and fig. 

 in hononr of the professor of Zoology in King's College, 

 whose labours have been eminent in this department of science. 



A species of the Genus Grapsus is in the Athenaeum at 

 Plymouth, under the name of G. Pelagicus, by Mr. Prideaux 

 and known to Dr. Leach, but not in any published work. Jt 

 is understood that the collection in the Museum of that Insti- 

 tution is confined to specimens taken on the borders of Devon 

 and Cornwall. 



OXYSTOMES or SHARPMOUTHS. 



GENUS EBALIA : Carapace dilated at the sides, the gene- 

 ral figure rbomboidal; feelers of the footjaws not dilated at 

 the sides. 

 BRYER'S EBALIA. E. Bryerii. Leach's Malac. pi. 25. 

 M. Edwards' Crust, vol. 2, p. 128. Rare. 

 This is the only species that I have myself rm-t with, and 

 Dr. M. Edwards supposes that the others named are no more 

 than varieties. The other two are in the Athenaeum at Ply- 

 mouth. 

 CRANCH'S EBALIA. E. Cranchii. Leach's Malac. pi. 25. 



M. Edwards' Crust, vol. 2, p. 129. 

 PENNANT'S EBALIA. E, Pennantii. Leach's Malac, 

 pi. 25. M. Edwards' Crust, vol. 2, p. 129. Pennant pi. 9, 

 a, fig. 19. 



