164 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



two sperm sacs extend posteriorly as narrow tubes through a consid- 

 erable number of somites to points near the posterior ends of the 

 prostate glands, and are then enlarged and crowded with sperm 

 masses. In the type-specimen the enlarged parts of the sperm sac ex- 

 tend from about 40 to 80, and in a paratype from 40 to 64. From the 

 ventro- anterior part of each magazine the corresponding sf)erm duct 

 extends posteriorly along the body wall to the region of the corre- 

 sponding i:)rostate gland where it turns dorsally and follows the 

 course of the gland for a short distance and then enters it through 

 a small knoblike diverticulum. Each gland is long, tubular, and 

 somewhat contorted. Its diameter is less for a short distance near 

 the opening of the gland into the enlarged muscular bursa. Traced 

 from the bursa the glands curve dorsally, one on either side of the 

 intestine, make an abrupt turn at the points of entrance of the sperm 

 ^ij- ducts, and extend posteriad, par- 



.4^^ allel with the long axis of the 



/. ' ■ __ p -^t worm and dorsad of the intestine. 



\ 1 s^&^^^N^C^k?*' ^^ ^^^^ type-specimen they end in 



^ r ^^ '^ 40, and in one paratype in 38. 



In another paratype one extends 

 to 28 and the other to 35. 

 "^"'^ The spermatheca is an un- 



"-'** paired tubular organ located ven- 



FIG. 17.-P0LYT0REUTUS MULTIPORUS. WAX , . , ,, ^limpTitnrV PIlTll ITld 



MODEL RECONSTRUCTED IN PART FROM SEC- " '^^i 01 tHC aiimentai y cauai, ana 

 TioNs SHOWING CERTAIN FEMALE REPRODuc- tlic mcdiaH part Is veutrad of the 



TIVE ORGANS. XIO. oi, OVIDUCT; OS, OVISAC; ^ 1 rpi . i.1 



p St, PART OF POSTERIOR BRANCH OF sPERMA- UBrvc corcl. 1 lic spermatneca 

 theca; St, MEDIAN spERMATHECAL sAc; stf, forlvS at tlic autcrlor cud into 



FURCAL BRANCH OF SPERMATHECA. • _-i , llj!i.l 1 I C. ^ ■\ If 



right and left branches {x\^. 17, 

 st /), which are large and encircle the alimentary tract. In one 

 paratype the free ends extend beyond the mid-dorsal line. The diam- 

 eter of the median part of the spermatheca is distinctly less than that 

 of the proximal parts of the branches. The spermatheca extends 

 posteriorly from the bifurcation along the mid-ventral line close to 

 the body wall until it reaches the bursa around which it curves to the 

 left or right and opens to the exterior mid-ventrally on 18/19. 



The wall of the median sac becomes gradually thinner in the part 

 adjacent to the bursa and is quite thin near the pore. Posterior to the 

 pore there is an extension of the spermatheca (fig. 17, p st) which 

 has a rather narrow median part in close contact with the body wall 

 and extends posteriad to 25 or 26. Paired diverticula metamerically 

 disposed communicate with the median sac opposite the intersegmen- 

 tal pores in 19/20-24/25 or 25/26 through which the median sac 

 opens to the exterior. The wall of this posterior extension of the 

 spermatheca (fig. 16, p st) is identical in structure with that of the 

 spermatheca just anterior to the spermathecal pore in 18/19. The 



