. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 7.—Cryptozoon prolifiaim^ of slab reduced in size. (After Hall.) See also Fig. 61, p. 310. 87 .m^ - - 1, ^ Fig. 7<? Portion of ihin section of Cryptozoon proliferum {yi\\\\a^<\ x 50). (a) Corneous layers, (a^) One of these dividing, {b) Intermediate stroma withgranules of calcite, dolomite and quartz, traversed by canals. From a Micro-photograph by PROF. Penhallow. {To face p. 39. LIFE IN THE EARLY CAMBRIAN 39 If now in imagination we cast our tow-net ordredge into the sea of the Lower
. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 7.—Cryptozoon prolifiaim^ of slab reduced in size. (After Hall.) See also Fig. 61, p. 310. 87 .m^ - - 1, ^ Fig. 7<? Portion of ihin section of Cryptozoon proliferum {yi\\\\a^<\ x 50). (a) Corneous layers, (a^) One of these dividing, {b) Intermediate stroma withgranules of calcite, dolomite and quartz, traversed by canals. From a Micro-photograph by PROF. Penhallow. {To face p. 39. LIFE IN THE EARLY CAMBRIAN 39 If now in imagination we cast our tow-net ordredge into the sea of the Lower Cambrian, wemay hope to take specimens illustrative of all oursix groups of invertebrate animals, and underseveral of them examples of more than one subor-dinate group. Of the Crustaceans we might haverepresentatives of four or five ordinal groups, and
Size: 1762px × 1418px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthordawsonjohnwilliamsir1, bookcentury1800, bookdecade1890
