166 CALIFORNIA ACADEMY OF SCIENCES. 



In the intestine we find between the inner ends of the epithelial cells a layer 

 of connective tissue, stren,o;thening as it were that side of the perienteric sinus (fig. 

 111). Both o?sophagus and intestine are enclosed by a thin mesenteric sac, which 

 is nipped by the septa (fig. Ill, mes.) and pressed close to the chloragogen cells. 



Spermathecre. These are much broader than those of /S):). Smithi or Sp. tamesis, 

 but resemble more those of Sp. Fiseni and Sp. guatemaknais. Their position in 

 somites vii, viii, ix, is in the anterior part of the somite, opening in the intersegmental 

 groove and pointing backwards. Their pores are in line with the dorsal couple of 

 seta?, or 3 and 4. The muscular part is tubular, smaller, and consists of two layers, 

 one inner of epithelial cells, one outer thicker, of circular muscles. The inner epi- 

 thelial layer, which is a direct continuation of the epidermis of the body-wall, consists 

 of very tall, narrow, columnar cells, while the thick muscular coating is a direct con- 

 tinuation of the circular muscular layer of the body-wall. The free end of the 

 spermatheca is wavy and warty in outline, and consists of much shorter epithelial 

 cells, simply covered by the peritoneum. The spermatheca is very broad and very 

 flat (fig. 118). 



Sperm-sacs. There are two pairs of lobulate sperm-sacs in xi and xii projecting 

 from the anterior septum. They are situated principally dorsally, and resemble those 

 of Sp. tamesis, but are much less lobulate than those, and very much less lobulate 

 than the sperm-sacs of Sp. Eiseni, judging from sections of the species sent me by 

 Prof. Frank Smith for compaiison. 



Large masses of free spermatogonia and spermato7.oa are seen in front of the 

 ciliated rosettes. 



Ciliated rosettes (fig. 109) are large and very regularly folded. Each rosette 

 sends out a long tubular lip into the sperm-sacs, in way which I have figured in fig. 

 119c. In a cross-sectioned specimen I found this lip far back in the posterior part 

 of xii. The lower convolute lip of the funnel is almost absolutely regular, and similar 

 in each of the four rosettes. The spermducts appear to resemble those of Sp. tamesis 

 and <Sp. Eiseni. The spermiducal pore is situated just outside of the tubercula puber- 

 tatis in the anterior part of xx, just as in *S/:». Eiseni. 



Prostates. Smith is the first to describe the prostates in Sparganophilus. In 

 Sp. tamesis they appear not to be present, as Benham does not mention them. In Sp. 

 Benhami there are four pairs opening in somites xxiii, xxiv, xxv and xxvi, in front 

 of setse 1 and 2. The prostates are consti-ucted on the same principle as the prostates 

 in Acanthodrilid* and Cryptodrilidis, and consist of two parts; one basal and 

 muscular, one apical and glandular. The glandular part is tubular, straight or folded, 

 of considerable length, but confined to one somite. The glandular part contains an 

 inner epithelium, and surrounding it club-like glandular cells of varying lengths, 

 giving to the surface of the prostate a wavy and irregular appearance. The prostates 

 in this species difier from those of Sj). Smithi by having a muscular duct or basal 

 part. This latter does not exist in Sp. Smithi, the glandular part in the latter species 

 being immediately attached to the body-wall. 



Xephidia. There is undoubtedly some difference in the location of the most 



