PACIFIC COAST OLIGOCH^TA. 



KEFERENCE TO LETTERS ON PLATES. 



a. c. gl. anterior calcic glaud. 



a. f. anterior fold of uephridium. 



a. nephr. anterior nephridia. 



a. sptl. anterior spermduct. 



atr. atrium. 



hd. body-wall. 



bl. blood vessel or capillaries. 



6^ «. blood sinus. 



br. bridge in uephridium. 



buc. buccal cavity. 



c. clusters of Innate cells. 



c. c. columnar cells. 



c. ep. ctelomic epithelium. 



c. gl. calciferous glands. 



ch. discharge chambers of glnnds. 



chlo. chloragogen cells. 



cil. ciliated epithelium. 



cl. c. clitellar cells. 



cl. clitellum. 



c. 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. 



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 uephridium. 



neph. uephridium. 



neph. p. nephropore. 



ties, oesophagus. 



ov. ovary. 



ovd. oviduct. 



org. sense organ. 



p. c. gl. posterior calciferous diverticulum. 



p.f. posterior fold, uephridium. 



phx. pharynx. 



p. neph. posterior nephridia. 



pr. prostate. 



p. spd. jjosterior spermduct. 



pr. sto. prostomium. 



ps. penial seta?. 



prt. peritoneum. 



«e. secreted matter. 



s. int. sacculated intestine. 



Sep. gl. septal glaud. 



.■<ep. septum. 



s. gl. suprapharyugeal glands. 



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



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



ape. sperm-cells. 



spd. spermduct. 



spgn. spermatogonia. 



spr. spur of nejihridium. 



s. ps. sac with penial setie. 



sp. 8. sperm-sacs. 



s. ph. -igl. subiiharyugeal glands. 



spth. spermatheca. 



splh. p. spermathecal pore. 



l. testes. 



t. m. transverse muscles. 



Irb. trabecula. 



th. spd. thicker part of spermduct. 



tn. 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 uephridial ducts. 



