LIVING BRACHIOPODA. 



377 



c. c. coelomic cavity. 



ci. cirrus or cirri. 



ci. m. cirri muscles. 



c. 1. corpora lutea. 



c. m. cutaneous muscles. 



c. o. central oblique muscle. 



c. r. ciliary ridge. 



cru. cmra. 



c. s. coelomic sinus. 



c. t. connective tissue. 



c. w. coelomic wall. 



1). dorsal shell. 



di. divaricator muscle. 



e. eggs. 



e. e. ectodermal epithelium. 



e. g. external glands. 



en. endothelial lining of pallium. 



e. o. external oblique muscle. 



e. s. encircling sinus. 



f. faeces. 



f . f . folds of funnel. 



f . y . fibrous yoke, 

 g- g"t. 



g. a. gill ampullae. 

 g. b. genital band. 



g. b. s. great brachial sinus. 



g. en. glandular enlargements. 



g. f. gill fold. 



g. g. glandular growth on edge of ilio-parietal band. 



gl. gland cells. 



gp. gastro-parietal band. 



g. p. a. ganglion of posterior adductor muscles. 



gp. m. gastro-parietal muscle. 



g. t. glandular tip of spermary thread. 



H. " heart of Hancock." 



i. intestine. 



i. b. inner band of pallia! muscles. 



in. infra-oesophageal ganglion. 



ip. ilio-parietal band. 



i. t. inner tube. 



1. lateralis muscle. 



la. lacunae. 



1. b. lateral branch of anterior sinus. 



1. i. lumen of intestine. 



1. p. lateral parietal band. 



1. p. s. lateral pallial sinus. 



1. s. lateral septa. 



m. mouth. 



m. cl. median cluster of setae. 



m. f. muscle fiber. 



m. g. median groove of pallium. 



m. p. main pallial sinus. 



in. s. median septum. 



m. si. median sinus. 



m. t. muscular tube. 



n. nerve. 



u. b. nephridium body. 



n. ba. nephridial band. 



ne. nephridium. 



nf . nephrostome. 



n. o. nephridial opening (external). 



n. p. nephridial papillae. 



n. s. natural size. 



n. t. nephridial tube. 



o. a. obliquus anterior muscle. 



o. b. outer band of pallial muscles. 



oc. anterior occlusor muscle. 



oc. I. occlusor externus muscle. 



oc. II. occlusor interims muscle. 



oe. oesophagus. 



o. e. obliquus externus muscle. 



o. h. s. outer horny sheath. 



o. i. obliquus interims muscle. 



o. 1. s. opening of lateral sinus. 



o. m. obliquus medius muscle. 



o. p. obliquus posterior muscle. 



o. p. s. outer pallial sinus. 



o. s. opening of main pallial sinus. 



ot. otocyst. 



ov. ovaries. 



pa. parasite. 



p. b. posterior band. 



p. b. 1. posterior branch of lateral sinus. 



p. c. peduncular cavity. 



p. ca. peduncular canal. 



p. ch. pallial chamber. 



p. cl. posterior cluster of setae. 



pe. peduncle. 



ph. pharynx. 



ph. g. pharyngeal gland. 



ph. m. pharyngeal muscles. 



p. m. peri visceral membrane. 



p. n. peduncle notch. 



p. o. posterior occlusor muscle. 



pro. protegulum. 



p. s . peduncular septum. 



p. si. peduncular sinus. 



r. rectum. 



r. b. retractor brachia muscle. 



re. rectus muscle. 



ro. rostrum. 



s. sinus at base of cirri. 



s. b. shell border. 



s. b. s. small brachial sinus. 



se. setae. 



s. f. setigerous follicles. 



s. g. stomachal glands. 



s . g. d. stomachal gland duct. 



s. g. o. stomachal gland opening. 



s. m. setal muscles. 



sp. spermatospore. 



spe. spermaries. 



spi. spiculae. 



spin. spermatozoa. 



sp. t. spermatic threads. 



s. s. supporting substance. 



