SOUTHWELL ANOMURA 119 



serrate crest, arising about the middle of its length, and increasing in size distally. 

 Ventrally and internally the carpus bears an entire carina. Carpus twice as long as 

 broad, and slightly shorter than the carapace. The fingers are straight, and there is no 

 hiatus between them when closed. The ambulatory legs are slightly hairy, the carpus 

 robust and flattened. 



Colour in formalin, a lovely and characteristic mosaic of mottled maroon. 



It is interesting to note that no mention whatever is made of the natural colour 

 either by Henderson in his Contribution to Indian Carcinology (18), or by de Man 

 in the Crustacea of the Mergui Archipelago (24). I have been unable to obtain 

 Audouin's original description. However, these colour markings are most 

 characteristic, and quite different in nature from anything I have previously seen. 

 The Kutch specimens were preserved both in formalin and in spirit, and in neither 

 case have the colours suffered any change, even after the lapse of two years. 



This species appears to be closely related to P. dentata (Milne-Edwards), from 

 which it differs in the peculiar and stronger development of the filigerous lines along 

 the carapace, and also in the inner margins of the fingers being hairy, and the spine 

 on the upper exterior margin of the merus being acute and not obtuse. 



Two specimens, one male and one female. 



Dimensions : 



Kutch specimen. De Man's specimen. 



Length of cephalothorax 1'4 cm. 8f mm. 



Breadth,, 1-3 8J 



Length of carpopodite I'O 5$ ,, 



From these measurements it will be noticed that the Kutch specimens are very 

 large, being approximately two-thirds larger than those examined by de Man. 



I have observed this species living in the cavities of certain sponges, and on the 

 branches of Spongodes, sp., on the Ceylon Pearl Banks. 



Locality: Hanuman Dandi Reef, Beyt. 



Petrolisthes armatus? (GIBBES). Plate, fig. 10. 



Porcellana armata, Gibbes (12). 

 Petrolisthes armatus, Stimpson (34 and 35). 



I doubtfully refer a damaged specimen of this genus to the species armatus, not 

 being able to refer to Gibbes' original description, or to Stimpson, and no figure being 

 available. The carapace is slightly flattened, longer than broad, and glabrous. There 

 is no epibranchial spine. The front is broadly triangular and round, deflexed with a 

 mesial furrow. The eyes are large. The chelipedes are equal, and two and a half 

 times as long as the carapace. The merus has a short acute spine at its internal distal 

 angle, and another one ventral and external. The carpus is almost as long as the 

 carapace, and bears three teeth along its internal face, and a ventral internal and 



