262 CALIFORNIA ACADEMY OF SCIENCES. 



longitudinally. These directly enclose the original duct. 

 A transverse layer of muscles surrounds the whole en- 

 largement. 



Habitat, under damp moss at springs at San Antonio, 

 near the city of Guatemala. Central America. 



Ocnerodrilus contractus, ;/. sp. Fig. 42, 43, 45, 50. 

 51, 52, 67, 80. 



CliteUiim occupies xiii-xviii. The inner pair of setai 

 in somite xvii is wanting. One very elevated papilla and 

 a narrow half-moon like groove around the male pore, 

 but no ventral zone. 



The septal glands resemble those of O. occidcntalis 

 and O. Rosce. The gland in somite v is not larger 

 than the one in vi, but somewhat smaller. The 

 gland in somite vi is the largest of the four glands. The 

 gland in somite vii is of nearly the same size as the one in 

 somite v, or slightly smaller. The gland in somite viii is, 

 as usual, very small as to height, but not as narrow of base 

 as the corresponding gland in O. Hendriei. All the 

 glands are only slightly lobed, almost entire in their 

 margins. The relative size of the septal glands distin- 

 guishes this species from O . Hendriei. 



The salivary glands of the pharynx are rather deeply 

 lobed, the lower glands being the largest ones. 



The septa supporting the septal glands vary in size, 

 and are all much thinner than for instance in O. Hendriei. 

 The one between viii and ix is the thickest. The one 

 between viii and vii is much thinner, and those between 

 V and vi and vi and vii are the thinnest, both being of 

 nearly equal size. 



The spermatheca is C3dindrical, rather even in outline. 

 It is larger than the same organ in O. Hendriei, but not 

 as large as in O. Rosce, though of about the same form 



