OVARIAN STRUCTURES OF VIVIPAROUS BLIND FISHES. 53 



(one going out by either horn) which are united near the point 

 of division of the ovarian horns, forming a single " horseshoe"- 

 shaped vessel. The veinlets which return the blood from the 

 posterior part of the ovary collect into one vessel which joins the 

 right horn of the "horseshoe" at a considerable distance in 

 front of the fork of the ovary, after running above and parallel 

 to the portion with which it unites, for the distance, in one speci- 

 men at least, of nearly 2 mm. 



It quite frequently occurs that red-blood corpuscles are pres- 

 ent in the ovarian sinuses of Stygicola and Lucifitga, though their 

 presence may be due to accident. As indicated elsewhere, these 

 sinuses are very probably filled with a plasma or lymph. 



BIBLIOGRAPHY. 

 Agassiz 



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Eigenmann. 



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'03 The Freshwater Fishes of Western Cuba. Bull. U. S. Fish Commission, 



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 Gill. 



'63 Stygicola. Proc. Ac. Nat. Sci., Phila., 1863, 252. 



Girard. 



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'74 Uber die Eibildung im Tierreich. Arb. Aus dem zoolog-zootom. Inst. 



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'60 Memorias, II., Havana, 1860. 



