. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 252 DISCOVERY REPORTS FEMALE SKULLS (Plates VIII, IX and X) The identifiable female skulls are thirty-two in number, and like those of the males display four age groups. On the whole the female displays rather greater individual variation than the male. First year (3). Body length 232-3 cm.; skull length 332 mm.; zygomatic width 174 mm.; alveolar length 89-8 mm. At this stage the skulls closely resemble those of 320- / / / / / / / 300- / / / / ^^ / ^^-^ / ^^-^ E2ao- f / u 1 / c 1 / 1 / _c 1 / &q
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 252 DISCOVERY REPORTS FEMALE SKULLS (Plates VIII, IX and X) The identifiable female skulls are thirty-two in number, and like those of the males display four age groups. On the whole the female displays rather greater individual variation than the male. First year (3). Body length 232-3 cm.; skull length 332 mm.; zygomatic width 174 mm.; alveolar length 89-8 mm. At this stage the skulls closely resemble those of 320- / / / / / / / 300- / / / / ^^ / ^^-^ / ^^-^ E2ao- f / u 1 / c 1 / 1 / _c 1 / "^260- 1 / 1 / QJ _J 1 / 3- 1 / T) 1 / 0 cG 240- 1 / 1 / 1 / 220- Averages of Ag'e Groups BodLj Length S 9 ZQQ- I n m EZ 420 400 380- c QJ 360 340 320 Years of Ag"e Fig- 1/ Averages of Age Groups Skull Length <5_ 9- — I n I m Years of Ag"e Fig- 4- ]¥ Fig. 3. Graphical representation of growth stages of body, both sexes. Fig. 4. Graphical representation of growth stages of skull, both sexes. the males and exhibit the rounded form, comparatively poor ossification and conspicuous sutures of the immature animal. The vertical plates of the pterygoids are frequently inclined outwards—a juvenile character which is found in the male skull throughout life—and the occipito-sphenoidal suture may begin to fuse. Cheek teeth crowded. Second year (11). Body length (5) 279-3 cm.; skull length 387-7 mm.; zygomatic width 199-3 mm.; alveolar length 101-5 mm. The bone is denser, the coronal and squamosal sutures are almost entirely fused, the occipito-sphenoidal is usually fused and may be obliterated, and the alveolar length has 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 Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Br
Size: 1466px × 1704px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
