30 ON THE GENERA UEOTHOE AND UROTHOIDES. 



PLATE IV. 



A. Urothoe pulchella, $ . 

 or. tr. Triturating organs in situ in the stomach. 



gn. 1. First gnathopod. prp. 3. Third perseopod. 



gn. 2. Second gnathopod. pik^- ^ P**'^ of pleopods. 



ur. 1, 2, 3. First, second, and third uropods respectively. 



T. Telson upturned, and consequently viewed from the underside. 



B. Urothoe iwrvegica. 

 gn. 1. First gnathopod. prp. 3. Third perseopod. 



gn. 2. Second gnathopod. pip. A pair of pleopods. 



ur. 1, 2, 3. First, second, and third uropods respectively, 

 'f. Telson. 



C. Urothoe brevicor7iis, 2 . 

 a.i. Lower antenna. l.s. Upper lip. 



ur. 1, 2, 3. First, second, and third uropods respectively. 

 T. Telson. 



