292 



Part III. — Twenty -fourth Annual Report 



only one case was the hermaphrodite organ symmetrical — that was a case 

 described by Weber, in which a testis was attached to the posterior end 

 of each ovary. In no case was the united organ composed equally of one 

 te3tis and one ovary. The connection of the vas deferens with the ovary 

 was similar in Howe's, Masterman's, and the present instance, except 

 that in Howe's a well-marked valve structure prevented the back passage 

 of ova into the vas deferens. A somewhat similar arrangement appeared 

 in Masterman's specimen. 



Kylef describes a case of hermaphroditism in the ling {Molva vidgaris). 

 The testis was in four parts ; a very large part much larger than the ovary 

 was attached to the anterior end of each ovary, and a smaller part was 

 connected with the hind end of each ovary, that connected to the right 

 ovary being very small. A small portion of the left ovary was separated 

 from the ovary posteriorly. Anteriorly each testis opened into the ovary 

 by a small aperture guarded against the issue of the eggs by a valve-like 

 fold of fibrous tissue. Posteriorly the left testis opened by its vas deferens 

 into the oviduct. In this specimen, then, we have a combination of the 

 tw r o conditions described above— viz., (1) the ovary functioning as a vas 

 deferens, and (2) the common use of the oviduct for the issue of both 

 eggs and sperms. The eggs were nearly ripe, and the testis was well 

 developed. The specimen was secured in May. 



Plate XV. 



Pig. 1. — Symmetrical hermaphrodite reproductive organs of Gadus 



callarias. 



Fig. 2. — Asymmetrical hermaphrodite reproductive organs of Gadus 

 callarias. 



Plate XVI. 



The Figures are not draton to Scale. 



Fig. 1.— Symmetrical hermaphrodite reproductive organs of Gadus 

 callarias. 



Fig. 2. — Dissection of connection between the testis and the anterior 

 end of the ovary in the symmetrical organ. 



Fig. 3. — Diagrammatic sketch of structure of testis of preceding. 



Fig. 4. — Asymmetrical hermaphrodite reproductive organs of Gadus 



callarias. 



Fig. 5. — Dissection showing connection between vas deferens and the 

 oviduct in the asymmetrical organ. 



Letters Used. 



a. — anus. 

 h.v. — blood vessel. 

 gn.ap. — genital aperture. 

 gn.me. — genital mesentery. 

 gt.me. — gut mesentery. 

 h.c. — honeycombed region 

 me. — mesentery. 

 ov. — ovary. 



ovf. — ovarian folds. 

 ov.int. —interior of ovary 

 sm. — smooth area, 

 r.— testis. 

 ur. — ureter. 



ur.bl. — urinary bladder. 



v. — vessel. 



*Masterman: "On Hermaphroditism in the Cod." Thirteenth Annual Report of the 

 Fishery Board for Scotland, Part III., for the year 1894, p. 297. 



fKyle: "Note on the Reproductive Organs of an Hermaphrodite Ling." Fifteenth 

 Annual Report of the Fishery Board for Scotland, Part III., for the year 1896, p. 396. 



