. The Quarterly journal of the Geological Society of London. W. Tams, Photc AULOPHYLLUM. [All figures magnified by I. 5.] Derby lex Quart. Journ. Geol. Soc. Vol. LXIX, ,.5. W. Tarns, Photo. , Derby. AULOPHYLLUM. Vol. 69.] -THE GENUS AULOPHYLLUM. 77 Figs. 6a & 3 b. Transverse sections of a third specimen in which rejuvenescencehas taken place. Fig. 3 b is cut through the point corresponding toE .. R iu text-fig. 8 (p. 73), and 3 a is cut about 3 aim. below thatpoint. Between 3 a and 3 b considerable reduction, both in numberand in length of the septal


. The Quarterly journal of the Geological Society of London. W. Tams, Photc AULOPHYLLUM. [All figures magnified by I. 5.] Derby lex Quart. Journ. Geol. Soc. Vol. LXIX, ,.5. W. Tarns, Photo. , Derby. AULOPHYLLUM. Vol. 69.] -THE GENUS AULOPHYLLUM. 77 Figs. 6a & 3 b. Transverse sections of a third specimen in which rejuvenescencehas taken place. Fig. 3 b is cut through the point corresponding toE .. R iu text-fig. 8 (p. 73), and 3 a is cut about 3 aim. below thatpoint. Between 3 a and 3 b considerable reduction, both in numberand in length of the septal lamellae, has taken place, X illustrating stereoplasmic 4. Vertical section through septa, showing the stereoplasmic thickeningof the septa and dissepiments in the cardinal quadrant. X from Peterhill Quarry, Bathgate. Discussion. Dr. A. Vaughan complimented the Author upon the detailedmanner in which he had studied a group of highly-specializedClisiophyllids, and felt sure that the paper would assist materiallyin the elucidation of many obscure points in the excellent figures shown by the Author it appeared that,as soon as any definite


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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845