ButL. U. S. B. F., 



:909. 



Pl,ATE XLIV. 



ant art 



t4isfj^-lo7,a 



CSC^ 



-dzut. 



'Sp7t\ \^^. sperm. 



Fie. 2. 



a 



Sf- 



>■/ \ ,Sph 



Jyar 



Ex— — - 



Fifi. J. 



Fig. I. — Immature ovary of lobster with abnormal ring on left anterior lobe for transmission cf left antennal artery {ani. art) 



H, heart. 

 Fig. 2. — Reproductive organs from right side of male, dissected to show sperm duct, and spcrmatophore (Spli) pressed from slit 



made in its side. p. s, gl. s, sp. mu^ duct, ejac, proximal segment, glandular segment, spnincter muscle, and ductus ejaculator- 



ius of vas deferens: pap, papilla for opening of duct on coxa of fifth pereiopod. 

 Fig. 3. — Transverse section (in plane j, fig. 4, pi, xLin) of homy pouch of seminal receptacle of female lobster, showing contained 



spermatophore (SPIi), gelatinous coats (g), and soft substance on lower side (-w) over sternal bar. a. Anterior; p, posterior. 

 Fig, 4,— Left third swimmeret of female, 9K inches long, with bifurcated endopodite; anterior side 

 Fig. 5. — Lobster's egg, showing its two membranes ruptured and greatly distended by reagents; mfei, primar^^ membrane or 



chorion; ml^, cement membrane of attachment, forming bag continued into basal stalk. 



