FRO.M THE INLAND SEA OF JAPAN. 



4-15 



The eggs arc 110/ mimevous, globular, large, their diaxieter being 1'75-1'8 mm. 



Pot. {Paratlielplinsa) eiidijmloii may easily be distinguished from Pot. {Parnpotamoii) 

 spinescens. Caiman, by the shape of the carapace, by the granulations on the anterior 

 regions and on the chelipeds, by the more numerous teeth on the antero-lateral border, 

 bv the shape of the orbits and of the epistome, by the characters of the outer footjaws, by 

 the remarkable shape of the immobile finger, by the extremities of the fingers, which are 

 not spoon-shaped, &c. 



Pot. {Paratlielplinsa) lanzi, Dofi. (PI, 33. figs. 61, 65), of which several typical specimens, 

 both males and females, were kindly sent me for examination by Dr. Doflein, of Munich, 

 is also a quite diffei-ent species. The cephalothorax of this larger species is longer in 

 proportion to its breadth, it is somewhat more arched both longitudinally and from side 

 to side, the interregional furrows are deeper, the lateral parts of the postfrontal crest 

 much more distinct, the lateral margins of the front more oblique, the antero-lateral teeth, 

 the orbits, the epistome, the outer footjaws, all are different from Pot. endymion ; the 

 chelipeds, the chelfe, and the tapering fingers are slenderer, their pointed tips more 

 acuminate, the immobDe finger presents the usual form ; the characters of the ambulatory 

 legs finally are also different. 



Measurements in millimetres of the two specimens of Pot. endymion. 



No. 1. No. 2. 



Greatest width of the carapace, the spines included 22"5 20 



Length of the carapace, in the middle line, the abdomen excluded . 17 15 



Distance between the external orbital angles 126 12'3 



Breadth of the frontal margin 6 5 "5 



Breadth of the posterior margin 8"25 7'5 



Breadth of the orbits 3-25 3-25 



Height of the orbits 2-25 2-25 



Length of the larger chela l-J-"3 12 



,, „ palm 8"5 7 



Height of the palm at the articulation of the fingers 6*75 5'3 



Measurements in millimetres of four typical specimens of Votamon lanzi, DoJL, from 

 the lower River Han, China, a few days from Hankow (Museum of Munich). 



^. d. 2. 2- 



Greatest width of the carapace, spines included .... 355 26 3i"o 30 

 Length of the carapace in the middle Hue, without the 



abdomen 29 22-3 29 24-5 



Disiance between the external orbital angles 24 19'5 23-75 20'3 



Breadth of the frontal margin 10 8 10 8-5 



„ „ posterior margin 11 9 I3'") 11'3 



Breadth of the orbits 6 5*5 6 5"5 



Height of the orbits 4 3-2 3-6 3-5 



Length of the antepenultimate joint of the abdomen . . . 2"6 2'2 



„ „ penultimate „ „ ... 36 3 



63* 



