80. 
81. 
CALIFORNIA ACADEMY OF SCIENCES. 
PLATE LI. 
ALEODRILUS KEYESI. 
Cross-section through somite ix, showing the septal glands and the thickened septa. ss. gi. septal gland, the 
prolongation of which probably connects with the intestine and the median blood vessel. «x. at this point the 
ventral vessel and the septal gland have been bent and cut twice. 5 
Cross-section through somite xii, showing the posterior sperm-sac. tra. trabecula. v. v. ventral vessel in two 
successive somites. spc. sperm-cell germinative area of cells with narrow nuclei. 
Section through apical part of spermatheca. 
Section through intestine and septal gland in somite x, anterior to fig. 72, showing discharge duct of septal 
gland. The ventral vessel and heart have been folded and cut three different times; similarly part of the septal 
gland has been cut twice. d. discharge duct of septal gland; it probably reaches in between the epithelia) 
cells of the intestine. 
Section through dorsal median vessel, where it connects with two lateral vessels; the section goes only through 
one of the points of connection. The lateral vessels are covered with chloragogen cell. 
Section through the suspended posterior part of the spermduct in the anterior part of somite xii. The duct is 
seen suspended between two mesenteric strands, one connecting with the heart, the other with the septum 
close to the body wall. h.v. heart valve. gl. gland emptying in spermduct. 
Section through spermduct in somite xi, the cut going through testis, which is immediately superposed on the 
duct or rather the posterior part of the ciliated rosette. 
Section through spermduct going through the ovary in xiii. a. spd. spermduct from anterior rosette, already 
attached to the body wall. p. spd. spermduct from posterior rosette, yet suspended and passing through the 
ovary. ov. ovary with full-grown ova, with germ-cells and with a germinative area where cells are in mitosis. 
The nuclei in the germ-cells are oval, while those in the grown ova are round. Zeiss D. Eyp. 2. 
Section through spermduct through one of the posterior somites where the two ducts have joined in the body- 
wall. clit. clitellum in xiv. 
wae oto), 
