54 HENRY H. LANE. 



Rathke. 



'33 Abhandlungen zur Bildungs- und Entwickelungsgeschichte des Menschen 

 und der Tiere, II. Leipzig, 1833, I., Abth. : Bildungs- und Entwickelungs- 

 geschichte des Blennius viviparus oder des Schleimfisches. 61 pp. 

 Ryder. 



'85 "On the Development of Viviparous Osseous Fishes, etc." Proc. U. S. 

 Nat. Mus, 1885, pp. 128-162, Pis. VI. -XI. 



Stuhlmann. 



'87 "Zur Kenntnis des Ovariums der Aalmutter (Zoarces viviparus, Cuv. ). 

 Tab. IV. (1887). 



Wyman. 



'57 Observations on the Development of Aiiableps gionovii. Bost. Journ. of 

 Nat. Hist, Vol. VI., No. IV., 1857. 



The paper by William Wallace, B.Sc., "Observations on Ovarian Ova and Folli- 

 cles in certain Teleostean and Elasmobranch Fishes," Quart. Jonrn. Micr. Sei., 

 XLVII, (July, 1903), pp. 161-213 (3 pis.), was not seen by me until after my paper 

 was in the Editor's hands. 



EXPLANATION OF PLATES. 



FIG. I. External ventral view of the ovary of Stygicola. Portions of the peri- 

 toneal covering are visible along the sides. 



FIG. 2. Cross-section of ovary near the beginning of the oviduct proper. Two 

 large ova at the sides. 



FIG. 3. Cross-section of non-pregnant ovary with stroma in two lobes one dorsal, 

 the other ventral. 



FlG. 4. Cross-section of pregnant ovary. The section is made through a region 

 corresponding to that of Fig. 3. 



FIG. 5. Cross-section of pregnant ovary through the middle portion. The ovisac 

 collapsed when the foetuses were removed. 



FlG. 6. Cross-section of pregnant ovary through the horns. 



FIG. 7. A portion of a cross-section of a non-pregnant ovary, showing a part of a 

 large ovum (0} surrounded by its follicle (fl.c.} ; the epithelial covering of the stroma 

 dips down, forming a tube to the ovum (D). Bausch and Lornb one sixth objective ; 

 2-in. ocular; tube length, 160 mm. 



FIG. 8. Portion of the epithelial covering of a non-pregnant ovary showing the 

 capillaries (r/j. ). Bausch and Lomb one twelfth objective ; i-in. ocular. 

 a. anterior. mr. mesorectum. 



cps. capillaries. o. ovum. 



d. dorsal. ovs. ovisac. 



D. the"Delle." ov.sf. ovarian stroma. 



fl.c. follicular cells. /. posterior. 



l.s. lymph sinus. v. ventral. 



mov. mesovarium. 



All drawings by the author; outlines made with Abbe camera; details put in free- 

 hand but with the closest possible regard to accuracy. 



