240 CARCINOLOGICAL STUDIES. 



closely allied ^). This species, however, which I examined in 

 Paris, may be distinguished from Telphusa picta by the 

 following characters. In Telphusa Goudoti the lower mar- 

 gin of the orbits is crenulate and separated from the 

 external orbital angle by a hiatus or emargination. The 

 orbits are less circular and comparatively a little broader. 



The front is also a little broader. The impressed line on 

 the ischium-joint of the external maxillipedes runs closer to 

 the middle of the joint. The antero-lateral margins of the 

 cephalothorax are a little longer and more prominent , the 

 posterolateral are slightly concave. The abdomen of the 

 male has a somewhat different form. The larger hand of 

 the male, finally, is also different, the fingers being much 

 less gaping. 



I add the measurements of two type-specimens of Tel- 

 phusa Goudoti , preserved in the Paris Museum : millimetres. 



cf cT 



Length of the cephalothorax 32 Vg 29 V4 



Distance between the external orbital angles. SO'/g ^T'/g 

 Greatest width of the cephalothorax ... 46 41\'2 

 Breadth of the front 10 9 



Geotelphusa transversa v. Mart,, identical with Geotel- 

 phusa crassa A. M. E., differs, according to a communi- 

 cation by Dr. Hilgendorf, by the following characters: the 

 branchial regions are much more convex in Geot. 

 picta , which is distinctly observed in a lateral view of the 

 cephalothorax by the curvation of the antero-lateral mar- 

 gins. The median lobe of the epistome has a more trian- 

 gular and not semicircular form. In the male the fingers 

 are gaping , which is not the case in Telphusa transversa. 

 The penultimate segment of the male abdomen is almost 

 exactly quadrate. The impressed points on the cephalo- 

 thorax are less deep and more distant from one another 



1) Telphusa Cumingii Miers (Report on the Zoolog. Collections made in the 

 indopacific Ocean during the Voyage of H. M. S. .Alert", 1884, p. 236) from 

 the Philippines, is quite imperfectly characterized, so that it is impossible to 

 recognize this species, which may be allied to Geotelphusa picta. 



Notes from the Leyden Museum , Vol. XIV. 



