ZooL.-VoL. II.] EISEN-OLIGOCHMTA. 163 



A revision of the species belonging to the above genera 

 is highly desirable, but until it is done nothing is gained by 

 lumping together the species under one genus. 



Argilophilus Eisen. 

 Argilophilus hyalinus, sp. no v. 



Definition.— 'Length, of contracted specimen 90 mm., width 4 mm. Setae 

 paired. Penial setae present. Clitellum saddle-shaped, in XIII-XIX. Gizzard 

 in V, very large. Spermathecae three pairs, without diverticles, in VII, VIII, 

 IX. Spermathecal pores are postseptal, in front of setce b. Testes in X, XI. 

 Sperm-funnels in X, XI. Ovaries in XIII. Oviducts in XIV, opening in 

 front of setae a. Sperm-ducts join in XVIII. One pair of tubular, coiled 

 prostates in XVIII. The intestine without diverticles. Nephridia are mega- 

 nephric. Color hyaline, without any pigment. 



Septal formula: — 



vTvi, vi/vii, vii/viii, viii/ix, Tx/x, x/xi, xi/xii. 



Habitat. — Coban, Guatemala, Central America. A single 

 specimen. 



To the above short definition I can add only a very few 

 details on account of the maceration of the single speci- 

 men. The definition is, however, sufficient, as the three 

 pairs of spermathecae without diverticles serve to fully char- 

 acterize the species. The form of the sperniatheca is that 

 of an unopened toadstool. In size the spermathecee are 

 small, not reaching much above half the diameter of the 

 worm. The frostate is flattened and coiled in one plane, 

 spreading over two or three somites. The muscular part is 

 thickest near the base. The s^erm-ducts probably enter 

 the prostate at the junction of the glandular and muscular 

 parts. The setcB are almost smooth except for a few small 

 notches on the inner side near the apex. The penial setae 

 are of medium size, slightly curved, with some shallow cor- 

 rugations along the free end. 



Argilophilus marmoratus coUinus, subsp. nov. 

 Plate XII, Figs. 118-121. 



Definition. — Male pores situated on lunate papillae, which are somewhat 

 sunk and entirely enclosed by a continuous oval ridge. The two ridges are 

 connected by a median elevated band running in the direction of the long 



