. The Quarterly journal of the Geological Society of London. e of thespecimen at the British Museum (Natural History) in June 1914,in which the intercalary venation was clearly shown. The detailedstructure of the wing was brought out by the simple expedient ofphotographing the specimen while it was immersed in a study of the British Museum photographs, kindly lent forthe purpose, many of the doubtful points of the wing have beencleared up, and its nearness to Hyper meg ethes schucherti Hand-lirsch made more certain. The wing is now redescribed in thelight of the knowledge thus obtai
. The Quarterly journal of the Geological Society of London. e of thespecimen at the British Museum (Natural History) in June 1914,in which the intercalary venation was clearly shown. The detailedstructure of the wing was brought out by the simple expedient ofphotographing the specimen while it was immersed in a study of the British Museum photographs, kindly lent forthe purpose, many of the doubtful points of the wing have beencleared up, and its nearness to Hyper meg ethes schucherti Hand-lirsch made more certain. The wing is now redescribed in thelight of the knowledge thus obtained.—H. JB., March 31st, 1916.]The costa is moderately convex from its base to a distanceof about 30 mm., beyond which it becomes perfectly from the costa by a very wide area basally is the sub-costa, an extremely feeble and hardly distinguishable vein. Itpasses straight out to meet the costal margin some distance beyondthe middle of the wing. Fig. 5.—Restoration of the left wing of Hypermegethesnorthumbrise, sp. nov. (Natural size.). The radius arises close to the sub-costa, and remains parallel to italong its whole length. It gives off two branches posteriorly, themore proximal branch passing obliquely inwards towards the innerportion of the wing-apex; while the second or distal branch arisesfrom the radius a little farther out, and keeps parallel to it. I hadformerly considered the proximal branch of the radius as the radialsector, and the distal one as a simple branch of the radius only. Ifthe wing be closely related to that of Hypermegethes schucherti,which now seems most probable (as will be seen later) my formerview will not hold. It would seem that the proximal branchingvein must be regarded as the main stem of the median vein, whichhas entered into union with the radius, and that the distal branchis the radial sector. Regarding the proximal branch of the radius as the medianvein, I find that it diverges widely from the radius. It gives offa forwa
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
