480 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



similar condition is shown by Perrier in his pi. 4 (1872), fig. 68, 

 where the stalk of the gland bifurcates near the parietes. "En arriere 

 de ces deux premiers organes se voit une petite masse glandulaire, 

 supportee par deux pedoncules." (See also Perrier's figure showing 

 the genital markings.) 



In specimens G there is a fairly conspicuous stalked gland pro- 

 jecting into the coelomic cavity dorsal to each genital marking, but 

 a stalked gland to the male pore tubercle has not been noted. In 

 specimens H there are stalked glands to the preclitellar genital 

 markings when the latter are present. There may be a tiny stalked 

 gland visible in the coelomic cavity near each prostatic duct. In 

 some specimens a rudimentary gland may be found within the mus- 

 culature in the vicinity of the prostatic duct. In other specimens, 

 especially those in which the median portion of the ridge in the male 

 parietal invagination is most compressed, no traces of glands or 

 stalks were found. 



Remarks. — There is some internal evidence to indicate that speci- 

 men C may be abnormal, but specimens A, B, D, and F appear to 

 be normal. 



Specimens G are certainly abnormal. Only one specimen has well- 

 developed prostates (extending through xvii-xxi) and prostatic 

 ducts (6 mm long, a middle portion thickly muscular). Each of 

 10 specimens lacks a prostate on one side, the prostate of the other 

 side small and restricted to xviii. The prostatic ducts are present, 

 even in absence of the prostates but are usually straight, the length 

 varying from 3 to 6 mm. Other abnormalities have been noted in 

 these worms especially in connection with the male deferent ducts. 

 Two worms each have a pair of well-developed funnels in xii and a 

 pair of seminal vesicles in xiii. No testes were found in xii in 

 these specimens, but one has hypertrophied ovaries. In three worms 

 the seminal vesicles are unusually large but are filled with parasitic 

 masses. Each of two specimens has one male genital area that ap- 

 proximates more or less closely the condition characteristic of 

 corrugata. 



Specimens H are also almost certainly abnormal. The testis sacs 

 of X and xi, which may be unpaired or paired, have little or no 

 testicular coagulum but may be filled by the hypertrophied and 

 undischarged testes and the male funnels. The seminal vesicles of x 

 and xi are usually small, each vesicle provided with a primary 

 ampulla, which is constricted off from the ventral lamina but not 

 sunk therein, the ampulla often of about the same size as or only 

 slightly smaller than the ventral lamina. In one small specimen, how- 

 ever (85 by 214 mm), with genital markings, the seminal vesicles 

 are large (relatively), in contact transversely over the dorsal blood 



