. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 288 DISCOVERY REPORTS width IOI-6 mm., 54-5 per cent of the skull length; hamulo-premaxillar length 114 mm. 61-2 of the total length. There is very little difference from the male skull of the same age 15T Z70 except for smaller size and more insignificant development of the pre-orbital region. The temporal line is about level with the post- orbital processes, and the whole cranium is smooth and rounded. All the permanent teeth are present, but the permanent canines scarcely show above the gum a
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 288 DISCOVERY REPORTS width IOI-6 mm., 54-5 per cent of the skull length; hamulo-premaxillar length 114 mm. 61-2 of the total length. There is very little difference from the male skull of the same age 15T Z70 except for smaller size and more insignificant development of the pre-orbital region. The temporal line is about level with the post- orbital processes, and the whole cranium is smooth and rounded. All the permanent teeth are present, but the permanent canines scarcely show above the gum and, as in the male, milk canines may be present. All the sutures may be traced, but the components of the occipital segment have begun to fuse. The suture between the basi-occipital and the basisphenoid is open (Plates XI, XII, XIII, figs. i). 250- 230 2ID- 190 End YEAR OF AGE 3rd 4th , -h 5th 6thorOve:r BODY LENGTH [CM] SKULL LENGTH [MM] HAMULO-PREMAXILLAR LENGTH[mm] ZYGOMATIC WIDTH [MM]. 170 -150 130 110 Fig- 5- Female sea lions. Increase in measurements during growth. SECOND YEAR. Total length 201 mm width 110 mm., 547 per cent of the length; and hamulo-premaxillar length 125-3 nirn-j 62-3 per cent. The cranium is slightly flattened and the facial region slightly better developed in proportion to the skull as a whole, while the temporal line has moved up towards the middle line as the jaw muscles have developed. On the whole the teeth have increased in size and the permanent canines are now present and the longest teeth in the jaws. There is increased fusion of the occipital region but all the other sutures are patent (Plates XI, XII, XIII, figs. 2). THIRD YEAR. Total length 212-5 mm., 17-0 per cent of the body length; zygomatic width 17-0 per cent of the body length; zygomatic YEAR OF AGE 3rd . 4th Stth 6th or over. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
