396 



THE INVERTEBRATA 



an: 



ah.Q + t. 



Fig. 273. Malacostraca. A, Apseudes ; B, Cyamus ; C, Phrojiima 9 ; D, Leucifer S. 

 ab. abdomen; an.' antennule; an." antenna; the antennae of Cyamus are 

 minute and those of Phronima $ reduced to a tubercle containing the green 

 gland; br. gill; e.' , e." the two sections of the eye oi Phronima; t. telson; 

 th. thorax. The numerals indicate somites or their appendages. 



