244 CARCINOLOGICAL STUDIES. 



uular, is armed with a strong tooth at the inner angle, 

 below which there is still a smaller one. 

 The ambulatory legs are rather short. 

 I give the measurements of two type-specimens of Geot. 

 crassa A. M. E. from the Paris Museum, collected at Cape 

 York, and of our two younger individuals from the Fidji 

 Islands : 



millimetres. 

 1. 2. 3. 4. 



cf^) 9 cT 9 



Length of the cephalothorax (ab- 

 domen excluded) 20V3 16 V4 13 13 



Distance between the external or- 

 bital angles 17^3 I4V4 11 11'/* 



Greatest breadth of the cephalo- 

 thorax 301/3 22V2 I6V5 17 



Breadth of the anterior frontal 



margin 6 4V2 474 47.3 



The differences between Geot. transversa and Geot. picta 

 have already been enumerated by me on page 240. Finally 

 may be added the following remarks on the original de- 

 scription of Geot. transversa by von Martens made by Dr. 

 Hilgendorf after an examination of the type-specimen and 

 which he afterwards communicated to me. The cephalo- 

 thorax of the male is only 25 mm. long (not 26 mm.) and 

 31 ^/j mm. broad (instead of 32). Besides the punctulation 

 of the carapace , Hilgendorf observes a very minute , so- 

 mewhat irregular granulation. The frontal margin presents 

 in the male specimen no trace of emargination. The ex- 

 ternal orbital angle may hardly be said to be dentiform. 

 The lateral margins of the penultimate segment of the 

 abdomen of the male are not quite parallel , though they 

 are much less convergent than those of the other segments. 



1) The cephalothorax of the male type from Cape York in the Paris Mu- 

 seum Collection is broken, so that the given measurements of the length and 

 of the greatest width are probably not quite exact. 



Notes from tlie Leyden ]\Xu.seu.txi , Vol. XIV. 



