CARCINOLOGICAL STUDIES. S 



the legs are also grooved above , but they do not present 

 the characteristic prominent tubercles of the other species. 



The cephalothorax and the legs of A. rugata are also 

 marked with some symmetrically arranged spots of a reddish 

 or violet colour , the largest of which covers the whole 

 mesogastric and the two internal protogastric lobules. 



The specimens from the Mergui Archipelago and those 

 from the Bay of Batavia , which I have referred (1. c.) to 

 A. Tufopunctata ^ now appear to be true representatives of 

 A. rugata. 



In a very young female specimen from the Fiji Islands, 

 which Prof. Milne Edwards likewise refers to A. rufopunc- 

 tata, the front projects a little less forward, the median 

 emargination is not so deep, and on each side of it the front 

 appears only slightly eraarginate towards the external angles. 



Actaea Riippellii Krauss , from Natal , is probably iden- 

 tical with A. rugata, but the cephalothorax of the species 

 of Krauss appears to be still somewhat narrower and less 

 enlarged. Dr. Hilgendorf , however , unites the two species. 



Actaea rugata Ad. & White has been recorded from Zan- 

 zibar, Mozambique, Mauritius, the Mergui Archipelago, 

 the Bay of Batavia , Macassar , the Philippines and New 

 Caledonia. 



The dimensions of a type-specimen of Actaea rufopunctata 

 M. E. from the Paris Museum , obtained in the Red Sea , 

 are the following : (ƒ 



Breadth of the cephalothorax 39 mm. 



Length (the front included) ^^^^'u ^ 



Distance between the external orbital angles 



(measured at the tips of the corneae) . . IVVg » 



Distance between the internal orbital angles . 11 ^/g » 



The dimensions of three specimens of Actaea rugata 

 Ad. & White are the following: 1. 



Breadth of the cephalothorax . . 32 26^/3 25 '/j mm. 

 Length » » » . . 23 



JN'otes from tlie X^eyden JMuseum, Vol. X^III. 



