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Show 1871.] MR. ST. GEORGE MIVART ON HEMICENTETES. 71 men; foramen rotundum distinct from sphenoidal fissure; optic nerve traversing an elongated and very small canal; a suboptic foramen ; infraorbital canal rather long ; no true alisphenoid canal; lachrymal foramen opens just in front of orbit; ascending ramus of mandible very concave externally ; first two upper molars quadri-cuspid, with an oblique ridge in each connecting the posteroexternal cusp with the antero-internal one. Fourteen or fifteen dorsal vertebrae and five or six lumbar vertebrae ; no hyperapophyses or hypapophyses; all lumbar processes small; clavicles slender ; scapula with a long, pointed metacromion process ; ulna complete and distinct; a scapho-lunar bone and os intermedium ; pubic symphysis very small or absent; fibula anchylosed below to tibia; metatarsus short; five digits to each extremity ; no caecum. Hab. Europe, Asia, Africa. ERINACEUS *, Linnaeus. I. _E_ * P.M. !E_. Skull slightly constricted between the orbits; transverse plate behind the posterior palatine ridge continuous with outer walls of pterygoid fossae ; defects of ossification in palate ; no external alisphenoid canal; mesopterygoid fossa ending posteriorly in an excavation of the basis cranii; suboptic foramen small and hidden ; spheno-palatine foramen close to the foramen rotundum ; upper canine small, generally with two roots; third upper and lower molars very small. Three sacral vertebra?; caudal vertebrae not numerous ; spinous process of axis moderate ; humerus generally with no supracondyloid foramen ; tuberosity of ischium not much prolonged backwards; femur with a moderate ectogluteal ridge. Hab. Europe, Asia, Africa. GYMNURA f, Vigors and Horsfield. I. |=|, P.M. ^\' Skull much constricted between the orbits; transverse plate behind posterior ridge of palate not continuous with outer walls of pterygoid fossae; no defects of ossification in palate; an external alisphenoid canal; mesopterygoid fossa not ending posteriorly in any excavation; suboptic foramen large and conspicuous; spheno-palatine foramen remote from foramen rotundum ; upper canine large and conical, with one root; third upper molar quadricuspidate ; third lower molar quite like the second. Five sacral vertebrae ; caudal vertebrae numerous ; spinous process of axis very large ; tuberosity of ischium much prolonged backwards ; femur with a very strong ectogluteal ridge. Hab. Malacca, Sumatra. * De Blainville, ' Insectivores,' p. 36, pis. vi., vii., viii., & x.; F. Cuvier, des Mammiferes,' no. xvi.; Owen, ' Odontography,' ii. pl. ex. fig. 5; Wagner, Suppl. ii. p. 10. _ f D e Blainville, ' Insectivores,' pis. vi. & x.; Owen, ' Odontography, u. pl. cxi. fig. 4; Horsfield and Vigors, Zoolog. Journ. iii. p. 246, pl. viii.; Wagner, Schreb. Supplem. ii. p. 45, v. p. 533. |