338 



ON SOME POINTS IN THE ANATOMY OF POLYPTERUS. 



XIV. Explanation of the Lettering op the Figures. 



ab.p. 



Abdominal pore. 



ab.p.c. 



Abdominal pore-canal. 



ab.v. 



Abdominal vein. 



aff.art. 



Afferent artery. 



an.f. 



Anal fin. 



an.f.m. 



Anal-fin muscle. 



ao. 



Aorta. 



b.c. 



Blood-corpuscle. 



b.v. 



Blood-vessel. 



b.iv.m. 



Body- wall muscle. 



c.v. 



Cardinal vein. 



cd.v. 



Caudal vein. 



con.tis. 



Connective-tissue. 



d.m. 



Dorsal muscle. 



e.ov.w. 



External wall of ovary. 



eff.art. 



Efferent artery. 



f.b. 



Fat-body. 



g.ap. 



Genital aperture. 



ff-P- 



Genital papilla. 



m.ov.w. 



Median wall of ovary. 



h. 



Kidney. 



k.v. 



Kidney- vein. 



It. 



Lymphoid tissue. 



m.cps. 



Malpighian corpuscles. 



mes.o. 



Mesoarium. 



rnes.t. 



Mesorchium. 



n.o. 



Nucleus of ovum. 



0. 



Ovum. 



o.at 



Attachment of ovum. 



op.m 



Opercular muscle. 



ov 



Ovary. 



ov.d 



Oviduct. 



ovd.ep. Epithelium of oviduct. 

 p.ep. Peritoneal epithelium. 

 pi. Pinnule. 

 pn. Pinna. 

 r. Rectum. 

 sp. Spermatozoa. 

 sp.art. Spermatic artery. 

 sp.ep. Spermatic epithelium. 



sp.v. Spermatic vein. 

 sw.bl. Swim-bladder. 

 t. Testis. 

 t.d. Testis-duct. 

 t.d.ep. Epithelium of duct of testis. 

 t.d.sh. Testis-duct sheath. 



t.r. Testis-ridge. 

 t.r.tbs. Testis-ridge tubules. 

 t.tbs. Testis-tubules. 



u. Ureter. 

 ti. ep. Epithelium of ureter. 

 n. g.ap. Urinogenital aperture. 

 u.g.s. Urinogenital sinus. 

 u.s. Urinary sinus. 

 u.sh. Sheath of ureter. 

 u.tbs. Uriniferous tubules. 

 v.d. Vas deferens. 

 v.d.ep. Epithelium of vas deferens. 



v.m. Ventral muscle. 

 w.o.u. Point where oviduct ends in wall of 



ureter. 

 w.v.u. Point where vas deferens ends in wall 

 of ureter. 



