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TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



n. c. = Nerve cells. 



n. cd. = Non-ganglionated part of 

 nerve cord. 



n. cdi. = Ganglionated part of nerve 

 cord. 



ne. = Nephridium. 



n. f. c. = Nuclei of young follicle 

 cells. 



np. — Nephridiopore. 



n. pr. = Nerve to prostomium. 



ns. = Nephrostomy 



n. s. f. = Nuclei of setigerous follicle. 



nu. = Nucleus. 



nifl. = Nuclei in mitotic division. 



nul. = Nucleolus. 



nu. mem. = Nuclear membrane. 



nu. sp. = Nuclear spindle. 



oa. = Ovum. 



ob. m. = Oblique muscles. 



oc. = Oocyte (pear-shaped). 



oc. y., oc. yh = Young and older 

 oocytes respectively. 



oe. = Oesophagus. 



ov. = Ovary. 



ovi. = Position of oviduct. 



ovs. = Ovisac. 



pe. = Penis. 



pe. s. = Outer penis sheath. 



pe. sK = Inner penis sheath. 



ph. = Pharynx. 



p. nul. = Principal nucleolus. 



pp. c. = Peripharyngeal commissure. 



pr. = Prostate. 



pro. = Prostomium. 



pr. t. = Preseptal part of nephridial 

 tube. 



ps. I. = Postero-lateral lobe. 



pt. = Peritoneum. 



pv. v. = Perivisceral vessel. 



pv. v. 2 = Perivisceral vessel of seg- 

 ment 2. 



pv. v. 3 = Perivisceral vessel of seg- 

 ment 3. 



r. = Wall of nephrostome. 



s. = Setae. 



se. = Septum. 



se. c. = Secretion of gland cells. 



s. gl. = Septal glands. 



s. f. = Setigerous follicle. 



si. v. = Supra-intestinal vessel. 



sm. t. = Tails of spermatozoa. 



sm. h. = Heads of spermatozoa. 



sp. = Spermatheca. 



spc. = Spermatocyte. 



sp. d. = Spermathecal duct. 



sp. g. = Sub- pharyngeal ganglion. 



sph. = Spermatophore. 



spm. = Spermatids. 



spo. = Spores. 



sp. p. = Spermathecal pore. 



sp. p 1 . = Spermathecal pouch. 



sp. s. = Sperm sac. 



s. s. = Setigerous sac. 



st. = Stalk. 



t. = Contractile enlargement of 

 nephridial tube. 



te. = Position of the testes in the 

 immature worm before the 

 development of the sperm sac. 



u. = Wall of ampulla. 



va. ep. = Vacuolated epithelium. 



v. bl. = Ventral seta bundle. 



v. d. = Vas deferens. 



v. d. 1 = Ciliated part of vas 

 deferens. 



v. d. 2 = Non-ciliated part of vas 

 deferens. 



v. pt. = Vesicular peritoneal cells. 



v. v. = Ventral vessel. 



w. cy. — Wall of cyst. 



x. = Thin- walled coiled part of tube. 



y, = Wider part of tube with vesi-. 

 cular peritoneal cells. 



y. gr. = Yolk granules. 



z. = Thick-walled tube leading to 

 nephridiopore. 



