566 



and in is fused with the basipodite; the exopodite is smaller and not 

 denticulate on the anterior margin. The telson is somewhat shorter than 

 the last urosomite and its margins armed with sparse setae. 



Distribution: A circumtropical species, found in the Atlantic (from 

 43° N. to the Cape of Good Hope), Indian (eastern part, Arabian 

 Sea), and Pacific (Kuroshio, Califomian, eastern-equatorial, and Peruvian 

 regions, New Zealand) oceans, and in the Meditertanean and Red seas. 



2. Tetrathyrus arafurae Stebbing, 1888 (Fig. 245) 



Stebbing, 1888: 1483. 



Length of adult animals not more than 5 mm. 



The shape of the body and the head and the structure of pere- 

 opods I-IV almost do not differ from those in T. forcipatus. 



The 2nd segment of pereopods V is 2.3-2.8 times longer than wide 

 and its anterior margin has a bulge in the middle part and is generally 



456 



Fig. 245. Tetrathyrus arafurae Stebbing, female. 



