128 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io4 



Color: Mottled grayish-brown on a light background in life, and 

 this pattern was retained over most of the specimen; a bit of it is in- 

 dicated at the posterior end in figure 84,6. 



Digestive tract: There is an elongated, much ruffled pharynx situ- 

 ated somewhat anteriorly in the body (fig. 84,6) ; no other details of 

 the digestive tract could be ascertained. 



CopuLATORY apparatus: Could not be seen in the worm when 

 whole but was surmised to be located just behind the pharynx to the 

 right of the tear. This region was accordingly removed and sectioned 

 sagittally. It was found to contain the whole of the copulatory ap- 

 paratus but there was much damage present and, further, through a 

 mishap, some of the most important sections were smeared. How- 

 ever, it was possible to make out practically all of the details of the 

 sexual apparatus and a sagittal view, which is slightly restored, is 

 given in figure 85,a. As in the preceding species, the male apparatus 

 lacks penis papilla, prostatic vesicle, and seminal vesicle, but the male 

 gonopore is of the usual size and leads into a normal tubular male 

 antrum. This antrum shortly presents a glandular lining and con- 

 tinues into a sacciform expansion also lined by a glandular epithelium 

 and surrounded by eosinophilous glands. This portion of the male 

 canal undoubtedly represents a prostate, although a definite prostatic 

 vesicle is wanting. Antrum and prostate show little muscularity. 

 From the anterior wall of the prostatic chamber a tube extends anteri- 

 orly in a horizontal plane for some distance and then recurves on itself 

 and runs posteriorly parallel to its former course. This tube appears 

 to be a common sperm duct. It is surrounded by an immense muscular 

 mass of circular fibers that extends anteriorly almost to the posterior 

 end of the pharyngeal folds. The proximal end of the common sperm 

 duct, situated shortly anterior to the male antrum, could be traced 

 into the spermiducal vesicles. 



The female gonopore lies some distance behind the male pore, but, 

 because of a deep fold between the two gonopores in the present speci- 

 men, it appears not far behind the male pore in figm-e 85,a. The fe- 

 male gonopore leads into a short antrum that expands at once into a 

 cement pouch receiving a large number of cement glands both ante- 

 riorly and posteriorly. From the cement pouch the vagina, lined by 

 a tall epithelium and with somewhat muscular walls, ascends dorsally 

 and expands into a small chamber, also considerably muscular. From 

 this chamber the vagina continues at right angles posteriorly as a short 

 narrow tube encircled by a mass of circular muscle fibers forming a 

 sphincter. The vagina then widens into a long broad tube with glan- 

 dular lining encircled by muscle fibers and it finally terminates by re- 

 ceiving separately the two oviducts at its proximal end. A Lang's 



