Dec, iyo3] Snodgrass : Anatomv OF Peranabrus Scarricollis. 187 



upper lateral parts of the abdominal cavity from the first to the sev- 

 enth segments. The tubes converge posteriorly and oj^en together into 

 the upper ends of the oviducts {otL), not serially along the sides of the 

 oviducts as in Dissosteira. The vagina is very short and opens into 

 the genital chamber above the anterior end of the eighth sternum. 



The spermatheca {spt. ) is an oval sac opening by a narrow neck into 

 the dorsal wall of the genital chamber just back of the opening of the 

 oviduct. A long coiled tubular gland (.i,''/. ) lies on the right side of 

 he rectum and opens posteriorly between the bases of the gonapoph- 

 yses. 



The spermatophores are large, globular, chitinous capsules, about 

 2.25 mm. in diameter, of a yellowish color, and having along slender, 

 tapering, curved neck. Each is filled with a mass of the feather-like 

 bundles of spermatozoa (Fig. 6) already described. The sperma- 

 theca contains only a few spermatophores — five in the specimens ex- 

 amined, and these are imbedded in an albuminous mass within it. 



• EXPL.VNATION OF THE PLATES. 

 Plate XII. 



Fig. I. Anterior view of the brain, ant. n., antenna! nerve; ca. c, circum- 

 cesophageal commissure;/", c, frontal commissure \f.g., frontal ganglion; /. «., labral 

 nerve; oc. ocellar nerves; a\ c, cesophageal commissure; ae. n., (esophageal nerve; 

 op. gl., optic ganglion ; op. I., optic lobe ; sg. it., stomatogastric nerve. 



Fig. 2. A part of the male reproductive organs, the testes and the smaller acces- 

 sory glands [ac. g/s^. of Fig. 8) removed, also the right epididymis partially unwound. 

 ac. gls., larger accessory glands ; ej. d., ejaculatory duct ; epd., epididymis ; vd., vas 

 deferens. 



Fig. 3. Subocsophageal ganglion, left side. ex. c, circumcesophageal commis- 

 sure; lab. 11., labial nerve; vid. «., maxillary nerve; nix. n., maxillary nerve;/, r., 

 posterior commissure. 



Fig. 4. Salivary glands and reservoir of one side. s. d., salivary duct of one 

 side ; s. gis., salivary glands ; s. >:, salivary reservoir. 



Fig. 5. A mature spermatozoon from the testis. 



Fig. 6. A feather-like bundle of spermatozoa from a spermatophore. 



Fig. 7. Female reproductive organs, dorsal view, g/., a tubular gland opening 

 into the bursa copulatrix back of the spermathecal orifice ; od., oviduct ; oz:, ovaries ; 

 spt., spermatheca. 



Fig. 8. Male reproductive organs, dorsal view. (7r. <,■•/?., larger accessory glands ; 

 ac. gls'., smaller accessory glands; ej. d., ejaculatory duct ; epd., epididymis; ies., 

 testis; v. d., vas deferens. 



Pl..\TE XIII. 



Fig. 9. A part of the pericardial diaphragm and one " alary " bundle of muscles. 

 The unperforated part of diaphragm is median. ' 



