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Show 68 Mil. ST. GEORGE MIVART ON HEMICENTETES. [Jan. 1/, posteriorly; no hyperapophyses ; hypapophyses beneath lumbar vertebrae ; scapula with a long metacromion ; clavicles slender ; internal condyle of humerus perforated ; scaphoid and semilunar separate ; pelvic symphysis elongated; metatarsus as long as, or longer than, digits, and much longer than tarsus ; sometimes only four digits ; a caecum. Hab. Africa. M A C R O S C E L I D E S * , Smith. Dentition: I.g M.igorjg. Skull sometimes much inflated by air-cavities, always much contracted between orbits; no postorbital process; large defects of ossification in the palate; pterygoid fossa extending forwards to posterior margin of palate ; suboptic foramen not conspicuous ; infraorbital canal very short, the lachrymal foramen opening immediately above posterior termination of infraorbital canal ; angle of mandible elongated ; upper incisors and canines all of much the same size ; third incisor with a single root; third lower molar but little smaller than the first or second. Six or seven lumbar vertebrae ; cervical spines very rudimentary ; ulna an-chvlosed to radius ; five digits to each extremity. Hab. Africa, including the the northern part. PETRODROMUS-)-, Peters. Dentition: I._"Z_, M. ^. A strongly marked sagittal ridge; skull never much inflated ; no postorbital process ; large defects of ossification in the palate ; pterygoid fossa extending forwards to the posterior margin of palate ; suboptic foramen conspicuous ; infraorbital canal short; angle of mandible elongated ; first upper incisor very much larger than the second; third incisor with two roots ; third lower molar but little smaller than the first or second; six or seven lumbar vertebrae ; cervical spinous processes very small; ulna anchylosed to radius ; five digits to the manus, four to the pes. Hab. Eastern Africa. RHYNCHOCYON j, Peters. 1 -I A A q q Dentition: I.^org-3, M . ^ . A strongly marked sagittal ridge; skull never inflated; cranium proper broad, flattened above and very little narrowed between the orbits; a marked postorbital process ; no defects of ossification in the palate ; pterygoid fossa extending not nearly so far forwards as the posterior margin of the pa- * De Plainville, ' Osteographie: Insectivores,' p. 57, pis. iii., v., vii., viii., x.; Wagner, Schreber. Supplem. ii. p. 81, v. p. 534; Duvernoy, M e m . de Stras'b. i! tab. i., ii., iii. p. 50; Dr. Andrew Smith, 'Zool. South Africa,' pl. xv.; Prof. Peters, 'Reise nach Mossambique,' p. 87, tab. xxii.; Geoff. St.-Hilaire Ann Sc Nat. 1829, xviii. pp. 165-173. t Prof. Peters, ' Reise nach Mossambique,' p. 92, tab. xxii., xxiii.; Wagner, Schreb. Supplem. v. p. 538. X Prof. Peters, ' Reise nach Mossambique,' p. 100, tab. xxii., xxiii:; Wagner, Schreb. Supplem. v. p. 531. |
