1 62 EISEN. [Vol. II. 



considerable interest, especially as the original descriptions are 

 scattered, and not readily compared. I wish to call especial 

 attention to the position of the spermathecal pores, which in 

 some species are post-septal, in others pre-septal, while in at 

 least one species some of the pores are pre-septal, while others 

 are post-septal. The existence of sexual spermathecal setae 

 is of the greatest interest. The sculptures of these setae vary 

 in different species, and in a detailed description should be 

 carefully noted. 



Another interesting feature in the anatomy of at least one 

 species, and probably in several, is the posterior " glandular 

 crop " of the intestine, found in xiv and xv. It is of a totally 

 different structure from the gizzard, and resembles greatly 

 the glandular crop which I have once described in Poiitodrihis 

 Micliaelseni, and which in this species is also situated poste- 

 riorly. 



With our extended knowledge of new species, it will be 

 necessary to modify the definition of the genus as given by 

 Ude, the last one to define the genus. Several of the char- 

 acters considered by him generic are now seen to be only 

 specific. 



In the following I have endeavored to mark the thickening 

 of some septa in a way that it could be readily recognized. 

 The number of bars above the Roman numeral indicates the 

 comparative thickness of the septa. Thus, one marked with 

 three bars is about three times thicker than the one marked 

 with one bar, etc. 



DiPLOCARDIA GaRMAN. 



Definition. — Setae, eight, in four couples, lateral and ventral. 

 Penial setae, present or absent. SpermatJiecal setae, present 

 or absent. Prostominm divides somite i more or less. Clitel- 

 hini saddle or ring like, generally xiii-xviii. Oviducal pores 

 xiv. Spermathecal pores, two or three pairs, either post- 

 septal or pre-septal. Spermidiical pores on xix, xx, or xxi, 

 according to species. Prostate pores on somites next anterior 

 and posterior to the spermiducal pores. The pores on each 

 side connected by a groove. A genital zojie generally present. 



