I'ACIKIC COAST OLIGOCHiETA. 



175 



REFEEENCE TO LETTERS ON PLATES. 



a. c. gl. anterior calcic glaud. 



a./, anterior fold of uephridium. 



a. nephr. anterior uepliridia. 



a. spd. anterior spermduct. 



atr. atrium. 



bd. body-wall. 



il. blood vessel or capillaries. 



bl. s. blood sinus. 



br. bridge in nepbridinm. 



buc. buccal cavity. 



c. clusters of lunate cells. 



c. c. columnar cells. 



c. ep. ccelomic epithelium. 



c. gl. calciferous glands. 



ch. discbarge chambers of glands. 



chto. chloragogeu cells. 



cil. ciliated epithelium. 



cl. c. clitellar cells. 



cl. clitellum. 



e. m. circular muscles. 



com. commissures. 



c. r. ciliated rosettes or sperm-funnels. 



c. t. 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. unicellar glands. 



gl. pr. glandular part of prostate. 



gizz. gizzard. 



h. heart. 



hy. hypodermis. 



i. 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. 



ne.c. neck of nephridium. 



neph. nephridium. 



neph.p. nephropore. 



(es. oesophagus. 



ov. ovary. 



ovd. oviduct. 



org. sense organ. 



p. c. gl. posterior calciferous diverticulum. 



p./. posteiior fold, uephi-idium. 



phx. pharynx. 



p. neph. posterior nephridia. 



pr. prostate. 



p. spd. posterior spermduct. 



pr. sto. prostomium. 



ps. peuial seta?. 



prt. 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. org. pr. sense organ cells in prostomium. 



spc. sperm-cells. 



spd. spermduct. 



spgn. spermatogonia. 



spr. spur of nephridium. 



s. ps. sac with penial sets. 



sp. s. sperm-sacs. 



s. ph. sgl. subpharyngeal glands. 



spth. spermatheca. 



splh. p. spermathecal pore. 



t. testes. 



t. m. transverse muscles. 



trb. trabecula. 



th. spd. thicker part of spermduct. 



tu. 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. 



