119 



indistinct furrow, which is found near the posterior margin of the 

 epimeral plates. This furrow is best developed on the second 

 segment, it disappears before reaching the transverse-furrow, 

 and on the fourth segment I have not been able to discover 

 it at all. 



In two other concretions have been found the back part 

 of the abdomen with the strong caudal fin. Unfortunately both 

 specimens are in a bad state of preservation, but there seems 

 to be a great resemblance to H. gammaroides M" Coy. 



In a fourth concretion remains of the new species of 

 Hoploparia were found. The carapace is preserved, but in 

 part as an imprint only. It is somewhat larger than in the 

 above described specimen, measuring a little over 50 mm. in 

 length. Otherwise the two specimens agree as far as can be 

 seen. But in this fourth specimen a left chela is preserved, and 

 this differs considerably from the above described right chela. 

 It has a length of about 70 mm., and the greatest breadth is 

 17 mm. The middle part of the surface is strongly arched. 

 Moreover it differs from the right chela by both fingers having 

 on their inner margin very pointed spines, whereof a few are 

 much larger than the rest, as is the case with H. gamtnaroides 

 M" Coy, according to Bell's description of that species. 



Hoploparia groenlandica n. sp. is certainly closely related 

 to H. gammaroides M*' Coy. Unfortunately I have only suc- 

 ceeded in getting a specimen of the latter species (from Sheppey), 

 which is in a bad state of preservation, for comparison. I 

 have therefore been obliged to rely on Bell's descriptions and 

 figures ^). 



I shall therefore, from Bell's description and figures indi- 

 cate in a few words the features in which the two species seem 

 to diff'er. 



*) Bell : A monograph of the fossil malacostracous Crustacea of Great 

 Britain. Part I. Crustacea of the London clay. p. 38. pi. 8, figs. 4—6 

 and pi. 9. The palaeontogr. Society. London 1857. 



