208 Studies in EnclujtraeUl Worms 



BIBLIOGRAPHY. 



(1) Beddard (1895). A Monograph of the Order Oligochaeta. 



(2) Eisen (1905). Harriman Alaska Exped. New York. 



(3) Friend (1912). The Genus Henlea. J.R.M.S. pp. 577-598. 



(4) Friend (1914). British Enchytraeids. J.R.M.S. pp. 128-154 



(5) Michaelsen (1889). Abh. Ver. Hamburg, vol. xi. Heft 1. 



(6) Michaelsen (1900). Oligochaeta. Das Tierreich, x. 



(7) Stirrup (1913). Proc. Zool. Society. 



(8) Welch (1914). Bull. Illinois State Lab. x. 



EXPLANATION OF PLATES XXVII-XXXII 



Plate XXVII, fig. 1. Transverse section through segment 5. 



„ „ fig. 2. Girdle glands (.4) and coelomic corpuscles (B). 



Plate XXVIII. Oesophageal gland. 

 Plate XXIX, fig. 1. Diagram of spcrmatheca. 



„ „ fig. 2. Transverse section showing spermathecac ending blindly. 



„ „ fig. 3. Dorsal view of brain, in outline. 



Plate XXX. Long. vert, section through segments 4-11. 

 Plate XXXI. Long. vert, section through segments 9-15. 

 Plate XXXII. Long. vert, section through segments 1-9. 



A. Glands in girdle segment. See v.g. 



B. Coelomic corpuscles to same scale. See c.c. 

 I-XV. Segment numbers. 



a.s. ampulla of spermathecac; br. brain; b.s.g. branches of salivary glands; b.v. blood 

 vessel; cav. cavity in oesophageal gland; rod. coelom ; c.c. coelomic corpuscles; 

 cil. cilia of intestine; d. dorsum; dep. depression in dorsal portion of head 

 d.b.v. dorsal blood vessel; d.f. duct of sperm runnel; d.S.g. dorsal salivary gland 

 /. funnel; g. girdle; h.p. head pore; int. intestine: 1.8.8. lateral setae sac 

 m. muscles; mo. mouth; n. nerve cord; neph. nephridlum, oes. oesophagus 

 oes.gr. oesophageal gland; p.b. penial bulb; ph. pharynx; p.m. pharyngeal muscula 

 ture; pr. prostomium ; sep. septum; s.g. septal glands; sp. spermathecae 

 spcr. spermatozoa; t.o. taste organ; t. 8. thickened septa to cany glands; r. ventral 

 surface; v.g. vacuolar glands ; v.s.g. ventral salivary gland; v.s.s. ventral setae sac 



