vd spl 



Fig. 60. Diagram of the male reproductive system of Lamellisabella. 



сое II - mesocoele; сое III - metacoele; di - muscular diaphragm; go - genital papilla; gp - genital 

 aperture; smt - somatopleural sp - sperm; spd - spermduct; spd 1 , spd*, spd :i , spd 4 ~ parts of the 

 sperm duct with distinctive histological structure; sph - spermatophore; spl ~ splanchnopleura; 

 5* - sperm sac; ts - spongy coelomic tissue; vd - dorsal blood vessel. (After Ivanov, 1958a.) 



D : 



