. A history of British mammals . Fig. 78.—Cheek-Teeth of Mimomvs : (l) left m^ol MimomjspHocicnicus {ctovmv\evi),bomthe pliocene Norwich Crag of England ; (2) right OTj of Af. intermedius (crown view),from pliocene Upper Freshwater Bed of Cromer, Norfolk ; (13 and 2a), external views ofsame,; 2a is reversed to facilitate the comparison with la ; 8 times life size. (Drawn byM. A. C. Hinton.) are amongst the .earliest microtines found in Britain, havingbeen detected in the late pliocene Norwich Crag. Judging from the jaws and teeth, some species {M. newtoni)agreed in size with medium-sized Micro
. A history of British mammals . Fig. 78.—Cheek-Teeth of Mimomvs : (l) left m^ol MimomjspHocicnicus {ctovmv\evi),bomthe pliocene Norwich Crag of England ; (2) right OTj of Af. intermedius (crown view),from pliocene Upper Freshwater Bed of Cromer, Norfolk ; (13 and 2a), external views ofsame,; 2a is reversed to facilitate the comparison with la ; 8 times life size. (Drawn byM. A. C. Hinton.) are amongst the .earliest microtines found in Britain, havingbeen detected in the late pliocene Norwich Crag. Judging from the jaws and teeth, some species {M. newtoni)agreed in size with medium-sized Microttcs, others [M. inter-meditis) with lemmings. The general pattern of the cheek-teethresembles that of Arvicola, but, instead of growing persistentlyas in the latter, they are provided with roots when adult. InM. plioc^nicus, m^ has in young stages of wear a third outerinfold or valley formed in the way normal in cheek- MIMOMYS 475 teeth of Microtince; in later stages (Fig. 78) this infold isreduced, its inner part being conve
Size: 1102px × 2269px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1910
