. Bulletin of the Natural Histort Museum. Geology series. FtMUR OF HYLAEOSAURUS ARMATUS 17 HOLOTYPE. BMNH RI84 and BMNH R185, associated left and right femora. Horizon and locality. Hastings Beds. Upper Valanginian, Lower Cretaceous (Rawson et al. 1978). Tilgate Forest, Cuckfield, West Sussex, England. Wealden Shales. Barremian, Lower Creta- ceous (Rawson et al. 1978), Isle of Wight, England. Referred material. Specimens listed by Galton (1975). Gallon & Taquet (1982). BMNH R167 an incomplete left femur (see below) and BMNH R170 (now registered as BMNH R12440) the proximal portion of a rig
. Bulletin of the Natural Histort Museum. Geology series. FtMUR OF HYLAEOSAURUS ARMATUS 17 HOLOTYPE. BMNH RI84 and BMNH R185, associated left and right femora. Horizon and locality. Hastings Beds. Upper Valanginian, Lower Cretaceous (Rawson et al. 1978). Tilgate Forest, Cuckfield, West Sussex, England. Wealden Shales. Barremian, Lower Creta- ceous (Rawson et al. 1978), Isle of Wight, England. Referred material. Specimens listed by Galton (1975). Gallon & Taquet (1982). BMNH R167 an incomplete left femur (see below) and BMNH R170 (now registered as BMNH R12440) the proximal portion of a right femur (see below). DESCRIPTION AND COMPARISON Lydekker (1888) referred a number of unassociated limb bone fragments (BMNH R170) to Hypsilophodon foxii (Huxley). Galton (1975) noted that two of the femoral fragments within BMNH R170 differed significantly from the majority of femora attributed to this I genus. distal end of the femur has a moderate posterior intercondylar groove and lacks an appreciable anterior intercondylar groove. Proximally, the lesser trochanter is separated from the greater trochanter by a narrow cleft (Galton 1974). Galton (1975) showed that the two specimens in question possess a distinct anterior intercondylar groove and he referred these specimens (now regis- tered as BMNH R8420 and BMNH R8421) to Valdosmtnis \{=Di-yosaiinis) canaliciilatus, a dryosaur from the Wealden of the [isle of Wight (Galton 1977, Galton & Taquet 1982). Examination of |the specimens remaining within BMNH R170 has yielded a proxi- ,mal femoral fragment (Fig. 2a) in which the lesser trochanter is separated from the greater trochanter by a deep cleft (Fig. 2b). This feature is characteristic of the Dryosauridae {sensu Sues & Norman 1990) and the locality and horizon from which the specimen comes suggests that it is referable to Valdosaiinis canaliculatus. BMNH R12440. Several limb bone fragments attributable loH. foxii remain las BMNH R170. I Galton (1975)
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