PACIl'IC COAST OLIGOCHiETA. 



177 



REFERENCE TO LETTERS ON PLATES. 



a. r. gl. anterior ciilcic gland. 



a. f. anterior fcild of nephridium. 



a. nephr. luiterior nephridia. 



a. spd. anterior spermduct. 



nlr. atrinm. 



hd. body-w:ill. 



III. lilood vessel or capillaries. 



bl. .<. lilood siuns. 



hr. bridge in nephridium. 



hue. buccal cavity. 



c. clusters of lunate cells. 



c. c columnar cells. 



c. ep. coelomic epithelium. 



c. gl. calciferous fjlands. 



ch. discharge chambers of glands. 



chlo. chloragogen cells. 



oil. ciliated epithelium. 



cl. c. clitellar cells. 



c^ clitellum. 



c. m. circular muscles. 



com. commissures. 



c. r. ciliated rosettes or sperm-funnels. 



c. I. connective tissue. 

 cu. cuticle. 



d. gl. dark staining glands. 

 d. pr. dorsal pore. 



d. V. dorsal vessel. 



e. epithelial cells. 

 ept. epithelium. 

 gl. glands. 



gl. c. unieellar glands. 



gl. pr. glandular pai't of prostate. 



gizz. gizzard. 



h. heart. 



hi/, hypodermis. 



('. s. gr. intersegmental groove. 



I. c. large cells. 



I. m. longitudinal muscles. 



m. muscles. 



m. atr. muscular atrium. 



mes. mesenteric tissue. 



m. pr. muscular prostate. 



n. nephridia. 



n. c. nerve cells. 



ne. nerve ganglion. 



nee. neck of nephridium. 



neph. nephridium. 



iieph. p. nephropore. 



a>s. oesophagus. 



ov. ovary. 



ovd. oviduct. 



org. sense organ. 



;). c. gl. posterior calciferous diverticulum. 



/)./. posterior fold, nephridium. 



/ihx. pharynx. 



p. neph. posterior nephridia. 



//;■. prostate. 



/). spd. posterior spermduct. 



pr. sto. prostomium. 



ps. penial setav 



prl. peritoneum. 



se. secreted matter. 



s. int. sacculated intestine. 



Sep. gl. septal gland. 



Sep. septum. 



s. gl. suprapharyngeal glands. 



s. org. b. sense organ cells in equatoreal zone. 



s. ory. pr. sense organ cells in prostomium. 



spe. sperm-cells. 



spd. spermduct. 



spgn. spermatogonia. 



spr. spur of nephridium. 



s. ps. sac with penial set*. 



sp. s. sperm-sacs. 



s. ph. sgl. subpharyngeal glands. 



spth. spermatheca. 



spth. p. spermathecal pore. 



t. testes. 



I. m. transverse muscles. 



trb. trabecula. 



th. s]id. thicker part of spermduct. 



ill. tubular intestine. 



tub. p. tubercula pubertatis. 



ty. typhlosole. 



u. c. unicellular glands. 



V. g. ventral ganglion. 



V. V. ventral vessel. 



V. sgl. ventral gland. 



w. " windings " of nephridial ducts. 



