(xii) 



REFERENCE LETTERS TO PLATES IV, XII-XV, 

 XLII, AND XLIII. 





a. antennules. 

 a 1 , antennae. 

 an. anus. 



b. median frontal sucker. 



c. filament duct. 

 eg. cement gland. 

 dg. digestive gland. 

 e. eyes. 



/. filament. 



g. ganglia. 



i. intestine. 



Is. lateral frontal sucker. 



Ins. lens. 



m. mouth. 



tud. mandible. 



mx, first maxilla. 



mx 1 . second maxilla. 



mxp. first maxilliped. 



mxp 1 . second maxilliped. 



n. nerves. 



o. ovary. 



od. oviduct. 



oe. oesophagus. 



os. ovisac. 



p l . first pair of feet. 



p". second pair of feet. 



p. third pair of feet. 



p". fourth pair of feet. 



p v . fifth pair of feet. 



jj vi . sixth pair of feet. 



rs. receptaculum seminis. 



rt. rectum. 



rtn. retina. 



s. stomach. 



sbg. sub-oesophageal ganglion. 



spg. supra-oesophageal ganglion. 



sp. sperniatophore. 



t. testis. 



u. vulva. 



vd. vas deferens. 



Nos. 1-13, NERVES, AS FOLLOWS : - 



1. optic. 



2. antennules. 



3. antennae. 



4. mandibles. 



5. lateral frontal margins. 



6. first maxillae. 



7. second maxillae. 



8. lateral cephalic muscles. 



9. first maxillipeds. 



10. second maxillipeds. 



11. first feet and stomach muscles. 



12. second feet and posterior 



cephalic muscles. 



13. third feet, fourth feet, fifth 



feet, genital 

 abdomen. 



segment, and 



