138 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



lobe contains a central muscular bundle connecting the 

 pharynx with the body-wall. Glandular cells surround 

 these muscular strands on all sides. The muscles to which 

 the most posterior lobe is attached run backwards to the 

 junction of somites VII and VIII. 



Subintestinal Vessel. — (figs. 39, 42). Beddard describes 

 and figures this vessel as being double in somites X and XI. 

 In my Eudrilus from Panama the vessel is single, judging 

 from an examination of an unbroken series of transverse 

 sections. It is surrounded by a zone of lymphatic tissues 

 (fig. 41) in which are seen a number of lymphocytes. 

 Immediately surrounding this vessel the tissue forms a thick, 

 even coating, which ventrally spreads out as a lamella on 

 either side (fig. 42). Under high power the tissue is seen 

 to be highly vacuoled, with two kinds of nuclei and here 

 and there a lymphocyte. The vessel connects directly with 

 the blood sinus in the median diverticle of the intestine. 

 The ventral side of the diverticle consists similarly of a 

 spongy tissue with numerous vacuoles separating the epithe- 

 lial linings. In this tissue we also find two kinds of cells, 

 some with much smaller nuclei than the others. 



The last hearts are in XI. The hearts in IX, X, XI are 

 of about equal size ; those in VII and VIII are smaller, the 

 former being the smallest. 



Diverticles of the Intestine. — These hearts are well 

 developed, as has already been mentioned by several inves- 

 tigators, especially Beddard. There is one point in which 

 the specimens from Panama differ from those of Beddard. 

 He describes the entrance of the diverticle into the intes- 

 tine as very wide, while in my specimens this duct is very 

 narrow (figs. 39, 40). In both of the median diverticles I 

 find large agglomerations of lime, a few of which are shown 

 in fig. 41. In the paired diverticles in somite XII neither 

 crystals nor any lime globules are to be found. 



Female Generative Af-paratus. — (figs. 49, 50). This 

 complicated apparatus differs considerably in details from 

 the wood-cuts and descriptions given by Beddard. The 



