. A manual of elementary zoology . Zoology. 356 MANUAL OF ELEMENTARY ZOOLOGY. - tp. s. mtn. Fig. 255.—The reproductive organs of a male dogfish. cl., Cloaca ;.//., "falciform" ligament; , rudiment of the internal opening of the oviducts; Lt., left testis; msn.^ mesone- phros ; ///so., mesorchium; mta., metane- 1 ili mi,;,^'j.(cesophagus;,right testis;««., rectum; , sperm sac; «^^., urino- genital papilla; , urinogemtal sinus; «n, ureter;w^.,ducts of metanephros;z».^, vasa efferentia; , vesicula seimn- alis ; , Wolffian duct or vas deferens. W
. A manual of elementary zoology . Zoology. 356 MANUAL OF ELEMENTARY ZOOLOGY. - tp. s. mtn. Fig. 255.—The reproductive organs of a male dogfish. cl., Cloaca ;.//., "falciform" ligament; , rudiment of the internal opening of the oviducts; Lt., left testis; msn.^ mesone- phros ; ///so., mesorchium; mta., metane- 1 ili mi,;,^'j.(cesophagus;,right testis;««., rectum; , sperm sac; «^^., urino- genital papilla; , urinogemtal sinus; «n, ureter;w^.,ducts of metanephros;z».^, vasa efferentia; , vesicula seimn- alis ; , Wolffian duct or vas deferens. Wolffian duct, — corre- sponding to the kidney duct of the frog, runs the whole length of the kidney, lying upon its ventral face and receiv- ing the tubules of the mesonephros. In the female it is straight and its hinder end is widened to form a icrinary sinus, which joins its fellow to open into the cloaca upon a median urinary papilla ; in the male it is coiled and serves, as in the frog, for the vas deferens, its swollen hinder part being a vesicula seminalis. The tubules of each meta- nephros are received into five or six ducts, which in the female open into the urinary sinus of their side, but in the male join to form a ureter which passes backwards to open separately from the vesicula seminalis into a median urino- genital sinus. This has two forward horns known as the sperm sacs, which lie upon the ventral faces of the vesiculae seminales, and opens behind into the cloaca by a urinogemtal papilla behind the anus. There is a single ovary,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Borradaile, L. A. (Lancelot Alexander), 1872-1945. London : H. Frowde, Hodder & Stoughton
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920
