^ACIFIC COAST OLIGOCHyETA. 



IS'J 



REFHKENCE TO LETTERS ON PLATES. 



a. r, gl. anterior ciilci(! glnnd. 

 a.f. anterior fold of nephridium. 



0. nephr. auterior nephridia. 

 a. spd. anterior spermduet. 

 air. atriiim. 



hd. body-wall. 



hi. blood vessel or capillaries. 



bl. 8. blood sirnis. 



br. bridge iu uepbridium. 



buc. buccal cavity. 



c. clusters of lunate cells. 



c. c. columnar cells. 



c. ep. coelomic epithelium. 



c. gl. calciferous glands. 



ch. discharge chambers of glands. 



chlo. chloragogen cells. 



cil. ciliated eijithelium. 



cl. c. clitellar cells. 



cl. clitellum. 



c. m. circular muscles. 



com. commissures. 



c. r. ciliated rosettes or sperm-funnels. 



c. I. connective tissue. 

 cu. cuticle. 



d. gl. dark staining glands. 

 d. pr. dor.-ial 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. a. (jr. intersegmental groove. 



1. r. large cells. 



I. 7)1. longitudinal muscles. 

 m. muscles. 



m. air. muscular atrium. 

 mes. mesenteric tissue. 

 m. pr. muscular prostate, 

 n. nephridia. 

 n. c. nerve cells. 

 ne. nerve ganglion. 



nee. neck of nephridium. 



neph. nephridium. 



neph. p. nephropore. 



(I'S. oesophagus. 



ojj. ovary. 



ovd. oviduct. 



org. sense organ. 



p. c. gl. posterior calciferous diverticulum. 



/). /. posterior fold, nephridium. 



phz. pharynx. 



;). neph. posterior nephridia. 



pr. prostate. 



/). .<;«/. posterior spermduet. 



pr. sio. prostomium. 



ps. peuial setaj. 



prt. peritoneum. 



se. secreted matter. 



8. 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. 



spe. sperm-cells. 



spd. spermduet. 



apgn. spermatogonia. 



spr. spur of nephridium. 



«. ps. sac with penial set;©. 



sp. 8. sperm-sacs. 



«. ph. sgl. subpharyngeal glands. 



spth. spermatheca. 



spth. p. spermathecal pore. 



I. testes. 



t. m. transverse muscles. 



trh. trabecula. 



th. spd. thicker part of spermduet. 



iu. tubular intestine. 



tub. p. tubercula pubertatis. 



ly. typhlosole. 



u. c. unicellular glands. 



V. g. ventral ganglion. 



V. V. ventral vessel. 



V. sgl. ventral gland. 



w. "windings " of uephridial ducts. 



