Invertebrate Gallery of the Indian Museum. 6g 



7th Family, Pontoniidse. This family is represented by 

 specimens of a Pontonia which lives in pairs, 

 male and female, within the shell of the large 

 bivalve Mollusk Tridacna. 



Sth Family, Acanthephyridge. The curious Hoplopho- 

 rus which has the antennal scale sharply pointed 

 and serrated along the edge, Ephyrina, and 

 Acanthephyra, belong to this family. All come 

 from great depths. 



9th Family. Palgemonidae. Fresh-water Shrimps. Ob- 

 serve the gigantic male specimen of Talxmon- 

 carcinus from Trivandrum, the second pair of 

 legs of which (in the male only] are more than 

 twice the length of the body, 



loth Family, Nematocarcinidae. Ne7iiatocara'nus with 

 its long legs ending in brush-like tufts is found 

 in the great depths of the Bay of Bengal. 



nth Family, Pasiphaldas. Pasiphlie, Parapasiphde 



and Psathyrocaris all come from the depths of 



the Sea. 



Several other families of Caridea exist but are not, 



as far as is known, represented in the seas or rivers of 



India. 



/3. DECAPODA BRACHYURA. 



[€:a0£0 49.5l,64-69]. 



This sub-Order includes the Crabs. 



The Brachyura differ from the other Decapoda in the 

 great development and concentration of the cephalothorax, 

 and in the rudimentary character of the abdomen. 



The abdomen, the segments of which are small and are 

 usually more or less fused together, is bent up beneath the 

 thorax : in the male it usually carries but two pairs of very 

 rudimentary feet, and although in the female there are 

 four pairs of hairy biramous feet, these are of no use in 

 locomotion and are only used in the breeding season to 

 carry the developing eggs. The eyes are lodged in distinct 



