562 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol.xxi. 



Unfortunately no material is available for a study of the internal 

 reproductive organs. The external arrangement is as follows: The 

 median region of annuli tbirty-four and thirty-five is pushed in to 

 form a deep pit, which at its inouth is about 2 mm. across. It inclines 

 cephalad and narrows toward the fundus. In one specimen it is at least 

 2.5 mm. deep. In tlie front wall, which corresponds to the inturned 

 part of annulus thiity-four, is an orifice which appears to be the male 

 pore. This is located more than a millimeter from the mouth of the 

 pit and between a pair of glandular folds or papillic, which, like 

 those described below, has each a pore at its summit. Five addi- 

 tional adhesive organs are related to the male pore. A pair is located 

 on the posterior margin of thirty-three, close to the median line. The 

 papilhe are low and wide, and the pores large, oblique, and crescentic. 

 A second pair is placed at the sides of the pit. Just within its mouth 

 and close to the iwsterior wall. A fifth and unpaired organ is placed 

 on the posterior wall of the pit at a higher (more dorsal) level than the 

 pair. 



Behind the male pit a large, conical, sugar-loaf- shaped papilla rises 

 from annuli thirty-six, thirty-seven and thirty-eight. At its slightly 

 pointed summit is the female pore, within the limits of the thirty-seventh 

 annulus. The papilla^ incline slightly' toward the posterirtr end of the 

 body. On each side of the female pore and rather toward the posterior 

 face of the papilla is an adhesive organ which in copulation would meet 

 one of the pair between which the njale pore is situated. Three more, 

 a pair at the base and a single median one higher up, are found on the 

 anterior face of the papilla, and in copulation would attach to the three 

 in the posterior region of the male pit. Another pair is located on 

 annulus thirty-eight, just outside of the base of the papilla, and corre- 

 sponds to the male pair on annulus thirty-three. In addition to these 

 there is a conspicuous pair farther out on thirty-eight, and on the pos- 

 terior portion of thirty-nine (or on thirty nine and forty of one speci- 

 men) a bilobed papilla with two pores on one side, and a linear trilobed 

 one with three pores on the other side of the middle line, which have 

 no visible counterpart in the male system. This last grouj) alone prob- 

 ably corresponds to the similar organ of Macrohdella, the others being 

 unrepresented in that genus. 



All of these organs consist essentially of more or less prominent 

 papilhe containing glandular sacs which open by apical pores, and whose 

 cavities frequently contain hardened masses of mucus. 



No. 4103, U.S.N.M. Xew Orleans, Louisiana; Dr. R. W. Shufeldt 

 (No. 593), 1883, one specimen. 



No. 4104, U.S.N.M. New Orleans, Louisiana; April, 1883; Dr. IJ. W. 

 Shufeldt (Xo. 1140), one specimen. 



No. 791, U.S.N.M. New Orleans, Louisiana; April, 1883; Dr. 11. W. 

 Shufeldt (No. 1139), one specimen. 



