PACIFIC COAST OLIGOCH/ETA. 



191 



REFER KNCE TO LETTERS ON PLATES. 



a. c. gl. anterior calcic nlaiul. 



re. /. anterior fold of uephridiiim. 



a. nephr. anterior uephridia. 



a. spd. anterior spermduct. 



atr. atrium. 



bd. body-wall. 



hi. blood vessel or capillaries. 



6/. s. blood sinus. 



hr. bridge in nephridinni. 



buc. buccal cavity. 



c. clusters of lunate cells. 



c. c. columnar cells. 



c. ep. coelomic epithelium. 



c. </^ caleiferous glands. 



ch. discbarge chambers of glands. 



chlo. chloragogeu cells. 



ril. ciliated epithelium. 



rl. c. clitellar cells. 



el. clitellum. 



c. m. circular muscles. 



com. commissures. 



c. r. ciliated rosettes or sperm-fnunels. 



c. I. connective tissue. 

 cii. cuticle. 



d. gl. dark staining glands. 

 d. pr. dorsal pore. 



d. V. dorsal vessel. 



e. epithelial cells. 

 epi. epithelium. 

 gl. glands. 



gl. c. imicellar glands. 



gl. pr. glandular part of prostate. 



gizz. gizzard. 



h. heart. 



hy. hypodermis. 



>. s. gr. intersegmental groove. 



I. c. lai'ge cells. 



/. m. longitudinal muscles. 



m. muscles. 



■m. atr. muscular atrium. 



mes. mesenteric tissue. 



m. pr. muscular prostate. 



n. uephridia. 



n. c. nerve cells. 



ne. nerve ganglion. 



ne.c. neck of nephridium. 



neph. nephridium. 



•neph. p. nephropore. 



as. oesophagus. 



ov. ovary. 



ovd. oviduct. 



org. sense organ. 



/;. c. gl. posterior caleiferous diverticulum. 



p.f. posterior fold, nephiidium. 



phx. pharynx. 



p. neph. posterior uephridia. 



/()•. prostate. 



p. upd . posterior spermduct. 



pr. nlo. prostomiiim. 



ps. penial seta*. 



prl. peritoneum. 



ne. secreted matter. 



s. int. sacculated intestine. 



sep. gl. septal gland. 



Sep. septum. 



s. gl. suprapharyngeal glands. 



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



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



spc. sperm-cells. 



spd. spermduct. 



spgji. spermatogonia. 



spr. spur of nephridium. 



s. ps. sac with penial setae. 



up. s. sperm-sacs. 



s. ph. sgl. subpharyngeal glands. 



spth. spermatheca. 



spih. p. spermathecal pore. 



I. testes. 



t. m. transverse muscles. 



trb. trabecnla. 



Ih. spd. thicker part of spermduct. 



tu. tubular intestine. 



tub. p. tubercula pubertatis. 



'.'/• typhlosole. 



u. c. unicellular glands. 



V. g. ventral ganglion. 



V. V. ventral vessel. 



V. sgl. ventral gland. 



w. " windings " of nephridial ducts. 



