CALII'OKNIA KUDRILID.E. Gl 



85. One of the sperm Imlls more hif;lily mafjnilied. Of these never more than one occupies the same chamber. 



S6A. A somewhat ilia^ramatic view of tlie anterior somite, conii)ose(l from several sections, in order to show the h)- 

 cation of the organs, theirrelative size, etc <■/. clitelhim. hr. lirain. r. h)wer commissure of ventral ganglion. 

 phx. pharynx, sl.gl. salivary glauils. if. (usophagus. ijz. gizzard. I.i. tubular intestine, .s. /. sacculated 

 intestine, n/ih. cross section of the anterior nephridia in somites ii, iii, iv. The other nephridia are not 

 shown, .iph. spermatheoie. ups. sperm-sacs. I. ups. lobed sperm-sacs in xii. oi\ ovary, ovil. ovidnct. 

 c. r. ciliated rosettes, up. tl. spermdnct; the connection with the ciliated rosettes not shown, i male 

 pore. /))•. prostate, p. ?. sacs with penial setit> oijening in the same pore, but move vcntrally than the pros- 

 tate, e. the place where the spermdnct enters the prostate. 



8015. The body opened from above and the interior organs exposed to view. A partially diagramatic view. The 

 dotted lines indicate the organs covered by others, and which could not be seen except by removal of overly- 

 ing organs. Letters indicate as in the preceding figure. 



S7A. Diagiamatic longitudinal section of gizzard. 



87B. Diagramatic transverse section of gizzard, to show its compressed shape. 



88. A part of the epithelium and muscular layer of the gizzard seen in longitudinal secticm. ip. epidermis, ipt. 

 epithelium. I. m. longitudinal mnscles. 



Si). A transverse section of the gizzard. (Letters as in fig. 88.) 



90. A transverse section of the alimentary canal adjoining the gizzard posteriorly, t. m. transverse muscles. 

 /. m. longitudinal mnscles. ep. epithelium cells, ehii. supposed chylus chambers, c. c. chloragogic cells. 

 (fl. glands, hi. bloodvessels. 



111. The same in longitudinal section. (Letters as in fig. 90.) 



92. Surface view of the same, showing the arrangement of the chylus chambers. (Camera drawing.) 



93.\. Section of a part of the dorsal vessel in somite xvi. m. muscular layer, hi. blood clot. c. c. chloragogic 

 cells. 



n.^iB. Section through the alimentary canal in somite xiv. 



94A. One of the testes. 



94B. Right testis in cross section. 



94C. Left testis in the same somite xi in cross section. 



95. Ovary. 



96. Section of the body in somite x, through testes. 



97. Section of the body in somite x through tbe sperm funnels, very close to the septum. 



98. Section through somite xi. 



99. Section through somite xii. sps. x. sperm sac in x. sps. xi. sperm sac in xi. xps. xh. sperm sac iu xii. 



III. longitudinal muscles connecting various organs with the body-wall. ;'. intestine, tl. v. dorsal vessel. 

 c. V. ventral vessel, h. hearts, t. testes, v. gl. ventral ganglion, .s. septum, 



100. Part of the sperm-sac. roc. parasitic ooccidin?. 



101. One of the sperm-sacs separated. 



102. Oviduct a and h, front view. c. side view of an abnormal oviduct with two, instead of one, upper lips. u.l. 



upper lii5. s. septum, m. muscular band. 

 10.3A. Cross section of the body-wall through the male-pore, showing sections of prostate and penial set*, pr. gl. 



sections of glandular j^art of prostate, pr. m. muscular part of prostate, p. .s. penial seta; and their sacs. 



V. vascular layer of the bod\--wall. /. m. longitudinal layer of muscles, t. m. transverse layer of muscles. 



c. gl. glandular layer of clitellum. h. hypodermis. g. ganglion, v. p. ventral pai't of the worm. 

 103B. Detail of former, nuclei in the muscular part of the prostate. 



104. One of the ciliated funnels freed from the attached sperm-sacs. 



10."). Diagramatic section through prostate, showing relative size of spermducts where they join the prostate. 

 100. Diagramatic representation of the prostate, showing its natural position when the body-wall is spread out. 



pr. glandular prostate, spd. sjiermduct. p. .i. penis-sacs. m. pr. muscular prostate. i\ I. vascular 



layer, v. ventral side. 

 107. Detail of the above, to show junction of spermdnct and prostate. 



105. Cross section of prostate, hi. r. blood vessels, o. gl. outer glands or prostate proper. /. (//. inner gland 



or ati-ium. 



109. Detail of the former, showing the way the outer glands opeu into the atrium between the inner cell layer. 



110. Ill, 112, 113. Successive sections through prostate and spermdnct, illustrating the junction of the two. In 



the first figure the spermducts have not yet entered the muscular part of the prostate. In the three follow- 

 ing figures ttiis junction is progressing, and finally almost accomplished. /. m. I. inner epithelium of the 

 muscular part of the prostate, pr. glandular prostate, sptl. spermdnct. /)/. v. blood vssels. m. I. 

 muscular layer of the spermdnct. In 110 the spermdnct has been sectioned twice, as it is here convoluted. 

 114, Cross section through the body-wall in somite xix. v. I. vascular layer. I. m. longitudinal layer of muscles. 

 t. m. transverse muscles, h. hypodermis. 



