. The annals and magazine of natural history : zoology, botany, and geology. species the position of the lower p^is individually variable (as in other primitive Rhinolophi) :in the tooth-row, or more or less external to the Iow. Theupper j[;^ is invariably in the row. Subdivision of the Group. The group may conveniently be divided into threesections:—the philippinensis section, the sedulus section,and the trifoliatus section. The first of these sections isrepresented by Rh. philippinensis and achilles * ; the second])y Rh. sedulus and lanosus; the third by Rh. trifoliatus,solitarius, luctus, p
. The annals and magazine of natural history : zoology, botany, and geology. species the position of the lower p^is individually variable (as in other primitive Rhinolophi) :in the tooth-row, or more or less external to the Iow. Theupper j[;^ is invariably in the row. Subdivision of the Group. The group may conveniently be divided into threesections:—the philippinensis section, the sedulus section,and the trifoliatus section. The first of these sections isrepresented by Rh. philippinensis and achilles * ; the second])y Rh. sedulus and lanosus; the third by Rh. trifoliatus,solitarius, luctus, perniger, geminus, and Beddomei. Theydiffer as follows :— * On JRh. vntratus and Maclaucli, see the General Keniarks onp. of the Rliinolophus philippiuensis Group. 245 (1) lu the pkilippinensis section the sagittal crest is lowin frontj gently sloping towards the postnasal depression(fig. 1). In the trifoliatus section the crest is high infront, and abruptly descending towards the postnasaldepression (fig. 2) : this causes a very different side viewo£ the ,^ Ficr. 1 a. Fig. 2 a. Fig. 1. Skull of Bh. pkilippinensis, side view. 1 a. The same skull,upper view. 2. Skull of Rh. trifoliatus, side view. 2 a. The sameskull, upper view. The specimens figured are of the same age (teethunworn), -f-. In the philijpinensis section the teeth are smaller, themaxillar width narrower, the coronoid process of themandible somewhat lower, the temporal fossa narrower^ thezygomatic arches, therefore, very slightly projecting laterally,making the zygomatic width of the skull but very slightly,or not at all, larger than the mastoid width (fig. 1 a). In thetrifoliatus section the teeth are larger, the maxillar widthbroader ; the stronger teeth involve an increase in size of thetemporal muscle, this again a slight heightening of thecoronoid process, a considerable widening out of the temporal 24G i\Ir. K. Andersen on the Bats fossa, a projecting of the hinder part of the zygomatic arch
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Keywords: ., bookcentury1800, bookids7annalsmagazi, booksubjectnaturalhistory
