1879.] NATURAL SCIENCES OF PHILADELPHIA. 145 



was long and narrow, measuring nine inches: it opened into the 

 cloaca. I can only account for the great length of the bladder in 

 the Arnphiuma and Siren on the supposition that it represents a 

 sort of rudimentary allantois. This view is strengthened by the 

 fact of the Arnphiuma having very simple limbs, and in this 

 respect also foreshadowing higher types of life. The urogenital 

 apparatus in its general arrangement resembles that of the newt 

 (Triton tceniatus). The testicle, however, was undivided, and 

 measured five and a half inches in length; it was situated in the 

 posterior third of the bod} - cavity. From the testicle six or seven 

 efferent ducts pass transversely outward to the remains of the 

 upper part of the Wolffian body, represented by a chain of dilata- 

 tions. From this embryonic remnant pass about twelve tubes into 

 a common uro-genital duct, which measures nine inches. This 

 duct runs in a wavy course until it reaches the lower part of the 

 Wolffian bod}', or the so-called kidney. Here the duct becomes 

 straight, and lies on the outside of the Wolffian body, from which 

 it collects, through small tubes, the urine. This common uro- 

 genital duct opens into the cloaca posteriorly to the bladder. I 

 was able by pressing upon the duct to squeeze a considerable 

 amount of semen through its opening into the cloaca, which gave 

 me the opportunity of examining the spermatozoa. These bodies 

 did not exhibit a very well defined head, but one end was obtuse 

 and the other tapered off tail-like. Just between the cloaca and 

 abdominal wall I found coiled up a nematoid worm, which may 

 be the Ascaris unguiculata. I found what seemed to be also the 

 same worm in an encysted condition in the intestine and in the 

 mesenterv. 



