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EXPLANATION OF PLATE XLIV. 



Mora mediterranea, Eisso (p. 436). 



A. Dissection of the right side, to show the arrangement and extent of the swimming-bladder, 



in relation to the viscera and vertebral column. 



B. Diagrammatic plan of the swimming-bladder, as seen from above. 



Four egg-cases of Batoidei (pp. 392 et seq.) — 



I. of Eaia blanda, 18-6 cm. x 7'6 cm. Parent fish measuring 46 inches in extreme breadth. 

 II. of Raia maculata, 6'7 cm. x 4-3 cm. Parent fish measuring 28^ inches in extreme breadth. 



III. of Baia circularis, GS cm. x 3-3 cm. 



IV. of Raia microcellata, 9-10 cm. x 5"7 cm. Parent fish 84 inches in extreme length, and 



23f inches across the disc. 



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