PACIFIC COAST OLIGOCH.ETA. 



IS I 



REFERENCE TO LETTERS ON PLATES. 



a. c. gl. anterior calcic glauil. 



a./, anterior fold of nephridinui. 



a. nephr. anterior nephridia. 



a. spd. anterior spermduct. 



air. atrium. 



hd. body-wall. 



bl. blood vessel or capillaries. 



bl. s. blood sinus. 



hr. bridge in nephridium. 



buc. buccal cavity. 



c. clusters of lunate cells. 



c. c. columnar cells. 



c. ep. cffilomic epithelium. 



c. gl. calciferous glands. 



ch. discharge chambers of glands. 



chlo. chloragogen cells. 



ril. ciliated epithelium. 



cl. c. elitellar cells. 



el. clitellum. 



c. m. circular muscles. 



com. commissures. 



c. r. ciliated rosettes or sperm-funuels. 



c. t. connective, tissue. 

 cu. cuticle. 



d. <jl. dark staining glands. 

 d. pr. dorsal pore. 



d. V. dorsal vessel. 



e. epithelial cells. 

 ept. epithelium. 

 gl. glands. 



(//. c. unicellar glands. 



gl. pr. glandular part of prostate. 



gizz. gizzard. 



h. heart. 



hy. hypodermis. 



i. s. gr. intersegmental groove. 



I. r. large cells. 



I. 711. longitudinal muscles. 



TO. muscles. 



TO. air. muscular atrium. 



men. mesenteric tissue. 



m. pr. muscular prostate. 



«. nephridia. 



H. c. nerve cells. 



ne. nerve ganglion. 



nee. neck of nephridium. 



neph. nephridium. 



neph. p. nephropore. 



«-«. oesophagus. 



ov. ovary. 



ovd. oviduct. 



org. sense organ. 



/). c. gl. posterior calciferous divert iculnui. 



p. f. posterior fold, nephridium. 



phx. pharynx. 



/). n^'.ph. posterior nephridia. 



pr. prostate. 



p. spd. posterior spcrmduit. 



pr. sto. prostomium. 



ps. penial set;i'. 



prl. peritoneum. 



se. secreted matter. 



8. hit. sacculated intestine. 



.wp. gl. septal gland. 



Sep. septum. 



s. gl. suprapharyugeal glands. 



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



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



spc. sperm-cells. 



K/id. spermduct. 



■ipgn. spermatogonia. 



spr. spur of nephridium. 



s. pa. sac with peuial setas. 



sp. s. sperm-saos. 



s. jih. agl. subpharyngeal glands. 



splh. spermatheca. 



aplh. p. spermathecal pore. 



(. testes. 



I. m. transverse muscles. 



trb. trabecula. 



Ih. spd. thicker part of spermduct. 



III. tubular intestine. 



tub. p. tubercula pubertatis. 



ly. typhlosole. 



u. c. unicellular glands. 



V. g. ventral ganglion. 



V. V. ventral vessel. 



V. sgl. ventral gland. 



IV. " windings " of uephridial ducts. 



