PACIFIC COAST OLIGOCHiKTA. 



185 



KEFERENCE TO LETTERS ON PLATES. 



a. r. f/l, auterior calcic glaud. 



a. f. anterior fold of uephridium. 



a. nephr. anterior nephridia. 



a. spd. anterior spermduct. 



atr. atrium. 



bd. body-wall. 



bl. blood vessel or capillaries. 



bl. s. blood sinus. 



br. bridge in nephridium. 



buc. buccal cavity. 



c. clusters of lunate cells. 



c. c. columnar cells. 



c. ep. cuilomic epithelium. 



c. gl. calciferous Klands. 



ch. discharge chambers of glpuds. 



chlo. chloragogen cells. 



cil. ciliated epithelium. 



cl. c. elitellar cells. 



cl. clitellum. 



c. m. circular muscles. 



com. commissures. 



c. r. ciliatt'd rosettes or sperm-funnels. 



c. t. connective tissue. 

 CM. cuticle. 



d. gl. dark staining glands. 

 d. pr. dorsal pore. 



d. V. dorsal vessel. 



e. epithelial cells. 

 epi. epithelium. 

 gl. glands. 



gl. c. unicellar glands. 



gl. pr. glandular part of prostate. 



gizz. gizzard. 



h. heart. 



hi/, 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. 



nee. neck of nephridium. 



7iepk. nephridium. 



neph. p. nephropore. 



cea. oesophagus. 



ov. ovary. 



ovd. oviduct. 



org. sense organ. 



p. c. gl. posterior calciferous diverticulum. 



/)./. posterior fold, nephridium. 



phx. pharynx. 



/(. neph. posterior nephridia. 



pr. prostate. 



;). 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. suprapharyugeal glands. 



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



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



spc. sperm-cells. 



.ipd. spermduct. 



spgn. spermatogonia. 



spr. spur of nephridium. 



s. ps. sac with penial setre. 



sp. s. sperm-sacs. 



s. ph. sgl. subpharyugeal glands. 



spth. spermatheca. 



spth. p. spermathecal pore. 



I. testes. 



t. m. transverse muscles. 



trb. trabecula. 



th. spd. thicker part of spermduct. 



tu. tubular intestine. 



tub. p. tubercula pubertatis. 



ti/. typhlosole. 



u. c. unicellular glands. 



V. g. ventral ganglion. 



V. V. ventral vessel. 



V. sgl. ventral gland. 



M). " windings " of nephridial ducts. 



