A new Eocene Crustacean. 031 



orbital angle is marked by a strong incurving spine, which also 

 forms the latero-anterior angle of the carapace. 



As is the case with all land- and shore -dwelling crabs the carapace 

 is much swollen, especially in the branchial regions : the cardiac 

 region is marked by four faint tubercles, the gastric by two lateral 

 depressions marking the line of separation between the gastric and 

 branchial regions ; with these exceptions and a few scattered granu- 

 lations on the surface, the carapace is destitute of any well-marked 

 surface-features or divisions into regions. The fore-limbs are nearly 

 equal in size, the arm is almost entirely concealed beneath the 

 carapace, and is very short ; the fore-arm is tumid, and is not 

 ornamented with spines along its border : the hand is short and 

 smooth ; the fixed ramus and moveable finger being furnished with 

 three or four small teeth along their edges. Three of the true 

 walking legs are preserved on the left and two on the right side ; 

 outlines of the absent limbs are given in the figure. As before 

 stated, in form, these limbs closely resemble those of the Grapsidce. 



I have failed in my attempt to work out the underside by reason 

 of the exceeding fragile nature of the fossil ; but I have no doubt the 

 specimen here described and figured was a female ; indeed there is 

 evidence of the first wide abdominal segment behind the posterior 

 border of the carapace. The smallness of the hands would also con- 

 firm this view, as in most, if not in all the quadrangular crabs, the 

 male has one or both hands large and well-developed, whilst those of 

 the adult female remain small and feeble. 



From the nature of the fossil, I am necessarily unable to offer 

 more than a very incomplete description of Goniocypoda, but I think 

 the occurrence of such a rare Crustacean novelty is a sufficient 

 excuse for placing it on record, in the hope that more perfect 

 remains may thus be brought to light. 



I have designated it Goniocypoda Edioardsi, after MM. Drs. Henry 

 and Alphonse Milne-Edwards, who have by their labours done so 

 much to advance the study of recent and fossil Crustacea in Europe, 

 and for whom I entertain personally so high an esteem. 



II. — On Necrozius Bowerbankii, a new Genus of Cancerid^ 

 FROM THE London Clay.^ 



By Professor Alphonse Milne-Edavaeds, D.Sc, M.D,, etc., etc. 



(PLATE XXI., Figs. 2 and 3). 



ON the genus Necrozius. — This new genus is very near to Ozius, and 

 is still more near to a small genus, established a few years since 

 by M. Stimpson, named Spherozim. Like this last-named form, the 

 carapace of Necrozius is remarkable for its globular form, its width 

 scarcely surpassing its length. The curve of the buckler is slight in 

 a transverse direction, but is great from back to front, the anterior 



^ Translated from ibe " Histoire des Crustaces Podophthalmaires Fossiles," par 

 Alphonse Milne- Edwards : (Reprinted from the Annales des sciences Naturelle. 

 Tom. xviii., 4te series, pp. 297). Paris, 1865. 



