. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. e floor, and doubly-winged sides,which are gently scooped above, and form a pair of sym-metrical ledges on which the widest part of the brain rests;whilst the floor dips much lower down, where the medullaoblongata and the pituitary body rest. The scoopedfenestrate alisphenoids () look inward, but fail to reachthe median line by a great space, which space is filled inby no orbital wings, such as we should see in a Lizard,Turtle, or Mammal. The whole orbital region is, in theskull, a steep wall, having
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. e floor, and doubly-winged sides,which are gently scooped above, and form a pair of sym-metrical ledges on which the widest part of the brain rests;whilst the floor dips much lower down, where the medullaoblongata and the pituitary body rest. The scoopedfenestrate alisphenoids () look inward, but fail to reachthe median line by a great space, which space is filled inby no orbital wings, such as we should see in a Lizard,Turtle, or Mammal. The whole orbital region is, in theskull, a steep wall, having a retral crest on its fore part,this crest being the rudiment of the large sheet of cartilage(legmen cranii), which is thrown over the brain in theyoung Salmon.* This wall (), this crest, and the elegantcartilaginous awning in front of the crest, containing valves S«8 article Amphibia, vol. i p. 753, fig. 5, * See Salmons Sltull, op. cit., 4, fig. 2, Lcfi and folded curtains of most cunning construction (see fig«10 and 11)—all these have grown out of that inter-misal. Fio. 9 —Skall of CAiVt. fourth Btago, Iicnrt nearly H Inch Ion(r, befilnnlng o1third wtek. X 4 diumitcrB. The aiMiiionftJ letters ere— aliflp^noldalfenestra; , posterior basl-cranlnl fontaneile: pro., prootic bone; ,antciior scmiciicular canal; , tympanic wing of exoccipltai; , bust-OcclpiUl; ba, foramen rotuiliium; 5, folameo i>VBJe. plate formed by the trabecuhnc as their commissure ( and 2, Ir.) Morphologically considered, these are added and distinctelements, but their differentia-tion from the trabeculae can-not be seen well until now,and even now it is leafy coverings of cartilageare seen to dip down on eachside of the prenasal spatula infront, and the cartilage at thispart forms a coiled, valvularnose-lid — the alinasal re-gion. From this, in its in-side, there hangs a curtain, all fio. of «v*. fourth stage, „ ... i„ ,n .,
Size: 1211px × 2063px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidencyclopaedi, bookyear1902
