216 CALIFORNIA ACADEMY OF SCIENCES. 



lined by a distinct intima, which is apparently absent 

 when there is no egg present and the cells are large. 



The smaller egg-chambers (6) contain a granular 

 mass of yolk (g) which is not surrounded by a covering 

 of its own . The epithelium is the same as in the lower 

 chamber, except that the anterior cells are not elon- 

 gated. Filling the anterior end of the enlargement of 

 the tubule are six large cells. The part of the tubules 

 connecting two egg-chambers is slender, with small epi- 

 thelial cells. 



Grosse states that there is present on each side of the 

 vagina a club-shaped spermathseca. In the specimens 

 of Menopon titan examined, however, there was no 

 organ of this kind present. 



In Eurymetopus taurus (plate xvi, fig. 1) the vagina 

 (va) consists of a large, wide, straight, invaginated tube 

 reaching forward to the fifth abdominal segment. Into 

 its anterior end open two oviducts, one from each side. 

 Into the posterior end on the dorsal side a duct opens, 

 connected at its distal end with a large, dorsoventrally 

 flattened, glandular organ (g). The cells of this are 

 very large and distinct (plate xvi, fig. 2). The duct is 

 divided into a wide distal and narrower proximal part. 

 The posterior end of the first is invaginated and the 

 second part arises from the inner end of this. Numer- 

 ous muscle-fibers (m) are attached to the upper part 

 around its middle. Spermatozoa were not found in the 

 gland. This appendage is constant, but the pouch 

 referred to varies a great deal. 



The oviducts are simple tubes extending outward, 

 anteriorly and dorsally into the fourth segment. 

 The}'- are sometimes narrow tubes with enlarged bases 

 and are sometimes wide throughout their whole length. 

 Each bears at its distal end five egg-tubules. These 



