528 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVIII 



testes, a loii^- vas dot'orens leacliiio- from each, and a pair of spermato- 

 phore receptacles in the genital seoincnt. The testes (t.) are ovate or 

 conical bodies situated in positions correspoiidino- exactl}^ to those of 

 the ovaries. 



They are considerably smaller than the ovaries and each o-ives off 

 from its anterior end a duct, tlu^ vas deferens (v. d.), which leads 

 directly backward without any couNolutions into the genital segment. 

 Here it enters the outer })order of the spermatophore receptacle (s. r.) 



at or posterior to its center. Each 

 receptacle is oval or elliptical in 

 shape, situated about in the cen- 

 ter of its own half of the genital 

 segment, and opens to the exter- 

 ior near the posterior angle of 

 the segment. On the ventral 

 sui'face of the receptacle, or a 

 little to one side of it, is a small 

 cenumt gland (c. g.) which se- 

 cretes the viscid substance com- 

 posing the covering of the sper- 

 matophore. 



In the receptacles the sperms 

 are gathered into oval spermato- 

 phores, each of which is covered 

 l)y the viscid secretion from the 

 cement gland, in which condition 

 they are pushed out of the re- 

 ceptacle and into the ^'ag•ina of 

 the female. As A. Scott re- 

 marks, the spermatophores do 

 not always reach the vagina, and 

 being viscid they stick to the 

 female's l)ody wherever they ma}^ 

 touch it. We thus often find 

 them scattered in little bunches 

 or clusters in various places all 

 over the ventral surface in among 

 the appendages. This was probably what the earlier observers mis- 

 took for eggs, after they had decided that the true agg sacks were 

 antcMuiic. 



ST'MMARY. 



1. The l)ody wall is made up of three layers, the outside cuticle, 

 the median cellular tissue, and the inner connective tissue which 

 forms a lamina supporting the various organs. 



2. The alimentary canal is practically a straight tube rumiing from 

 the mouth to the anus, with the regions but slightly differentiated in 



Fig. 34.— Sexual okgans of a male Lepeophthei- 

 Rus kdwardsi. c. g., cement gland; o, opening 



OF THE spermatophore RECEPTACLE, S. 1'., TO THE 



extep.ior: t, TESTIS: v. d., vas deferens. 



