552 PHILOSOPHY OF ZOOLOGY. 



c. Tall with two seta, one on each side. 

 25. NEBALIA. 26. ZOEA*. 



Tribe II. EDRIOPHTHALMA. 



Eyes sessile. 



Dr LEACH gives the following distribution of the ge- 

 nera : 



SECTION I. 



Body laterally compressed. Legs fourteen. Antennae 

 two, inserted one on eaeh side of tJie front of the head. 

 (Tail furnished with styles). 



1. PHRONYMA. 



SECTION II. 



Body laterally compressed. Legs fourteen, with lamelli- 

 form coxa. Antenna four, inserted by pairs. (Tail fur- 

 nished with styles). 



Division I. Antennae four-jointed, the last segment 

 composed of many little joints ; the upper ones very short. 



2. TALITKUS. 3. ORCHESTIA. 



Division II. Antenna? four-jointed, the last joint com- 

 posed of several little joints ; upper ones rather shortest. 



4. ATYLUS. 



Division III. Antennae three-jointed, the last one com- 

 posed of several little joints ; upper ones longest. 



5. DEXAMINE. 6. LEUCOTHOE. 



Division IV. Antennae four-jointed, the last segment 

 composed of several little joints, upper ones longest. 



Subdivision 1 . Four anterior legs monodactyle ; second 

 pair with a much dilated compressed hand. 



7. MELITA. 8. M^RA. 



Subdivision 2. Two anterior pair monodactyle and 

 alike. 



* See Dr LEACH'S Description of the Zota davata, TUCKEY'S Nar. p. 



