. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 284 Bulletin Museum of Comparative Zoology, Vol. 157, No. 4. Plate 15. Xylophaga abyssorum DaW. Figures 1-4. Specimens from Pillsbury, station 944. Figure 1. inner view of right valve showing muscle scars, deep groove posterior to the umbonal-ventral ridge, and the small chondrophore. Figure 2. Enlargement of hinge area of same speci- men. Figure 3. Hinge area of left valve. Figure 4. Dorsal view of umbonal area with mesoplax in place. This is the most elaborate mesoplax observed, having two tubes and a third developi
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 284 Bulletin Museum of Comparative Zoology, Vol. 157, No. 4. Plate 15. Xylophaga abyssorum DaW. Figures 1-4. Specimens from Pillsbury, station 944. Figure 1. inner view of right valve showing muscle scars, deep groove posterior to the umbonal-ventral ridge, and the small chondrophore. Figure 2. Enlargement of hinge area of same speci- men. Figure 3. Hinge area of left valve. Figure 4. Dorsal view of umbonal area with mesoplax in place. This is the most elaborate mesoplax observed, having two tubes and a third developing. Figure 5. Dorsal view of specimen from Gerda, station 266, with two tubes formed on each plate of the mesoplax and with two young just posterior to the 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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