50 



oni. muscles of the oviduct. 



on. ovisacs. 



ov. ova. 



p'- first pail' of feet. 



j)'^- second , , 



p"»- third 



j)''"'- fourth , , 



/;'■• fifth 



p(j. pigment. 



R. right. 



i\ rostrum. 



rej). receptaculum seminis. 



/■/. rectum. 



yt)t. retina. 



;■//. fin ray. 



S. spermatozoa. 



.s6;/. suhoesophageal 

 ganghon. 



sf. sternal fork. 



sg. cement gland. 



sp. spermatophore. 



spg. supra-oesophageal 

 ganghon. 



at. stomach. 



t. testis. 



V. ventral. 



va. vagina. 



erf. vas deferens. 



vu. vulva. 



y. opening of digestive duct 



into the stomach. 

 z. pore canals. 

 Nos. 1 to 13 nerves, as 

 follows : — 



1. optic. 



2. antennules. 



3. antennae, 

 -i. mandibles. 



4a. lateral frontal margins. 

 4b. first maxilUe. 

 J. second maxillte. 

 oa. lateral cephalic muscles. 

 0. first maxillipedes. 

 7. second maxillipedes. 

 6'. first feet. 

 8a. stomach muscles. 

 .V. second feet. 

 'Ja. posterior cephalic 

 muscles. 



10. third feet. 



11. fourth feet. 



12. abdomen. 



13. fifth feet. 



Plate I. 

 Fig. 1. Lcpeoplitheiruii pectoralis, mature female, dorsal 



view. X 17. 

 Fi<^ 2. LcpeoplUheirKs pectoralis, mature male, dorsal 



view. X 17. 

 Fig. 'd. LepeoplitJu'iru.i pectoralis, nauplius stage, newly 



hatched, x 52. 



