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Show 62 ON THE OSTEOLOGY OF THE SHORT-NOSED SPERM-WHALE. [Feb. 4, millim. Olecranon, length 25 Total breadth of carpus 80 Digits : Total length, including cartilage :- Left hand : I. digit 52 II. „ 185 III. „ 158 IV. „ 114 V. „ 52 Right hand1: I. „ 55 H. „ 183 HI. „ 148 IV. „ 102 V. „ 68 List of the memoirs to which references are made. 1. WALL : " History and Description of the Skeleton of a New Sperm-Whale." Sydney, 1851 (reprinted 1887). 2. O W E N : "On some Indian Oetacea." Trans. Zool. Soc. vi. 1865, p. 30. 3. K R E F F T : " Notice of a New Species of Sperm-Whale." Proc. Zool. Soc. 1865, p. 708. 4. v. H A A S T : " On the Occurrence of a New Species of Euphysetes on the Coast of New Zealand." Tr. N. Z. Institute, vi. 1873, p. 97. 5. Y A N BENEDEN & GERVAIS : ' Osteographie des Cetaces,' pp. 349, 515, pi. 61 (1880). EXPLANATION OP THE PLATES. PLATE II. Fig. 1. Anterior end of the ventral surface of the skull of Cogia brevieeps (X f), showing the paired premaxillary nodules (X) carrying the teeth (t). gr., maxillary groove, m.v., maxilla, pm.v., premaxilla. vo., vomer. 2. The external surface of the last two ribs (X f) showing what is believed to be the true position of the rudimentary (13th) rib in relation to the 12th. The cartilaginous lower end of the rib is dotted ; the upper region-indicated by dotted outline-is the presumed continuation of the rib to its articulation with the vertebra. At the side of each rib is shown the outline of its transverse section (a). 3. View of the anterior side of the 13th rib. X 1. PLATE III. Fig. 4. Sternum of Cogia brevieeps, with the sternal ribs, dorsal aspect. X £. 5. Hyoid, of which only the right anterior cornu is represented, dorsal aspect. X J. P L A T E IV. Fig. 6. The right scapula, external surface. X J. 7. The right pectoral limb, external surface. Some of the distal cartilages have been inserted from the more perfect left limb. X \. - Some of the terminal cartilages were imperfect on this hand, and have been restored in gelatine, but not quite accurately. |