Mr. R. B. Sharpe on a new Species of Bird. 63 



Plate VI. 



Fig. 1. Posterior part of inferior surface of skull of Loxomma, a different 

 specimen from that shown in Plates IV. and V. Natural size. 

 R, ridge on median line, fractured ; P.n.o, posterior nasal orifice ; 

 B.sph, basisphenoid ; B.oc, basioccipital ; Ar.cav, situation of 

 articular cavity, here broken away ; F.m, foramen magnum, 

 edge of ; F.exoc, facets of exoccipitals ; Qu, quadrate bone ; 

 Mast, mastoid bone ; Pter, pterygoid bone. 



Fig. 2. External surface right half-mandible of Loxomma, supposed to be 

 of the same specimen as is figured in Plates IV. & V. Half 

 natural size. The fractured part, the external end of the 

 articular cavity, and the marginal groove along the lower 

 border are well shown. 



Fig. 3. Internal surface of fragment of left half-mandible, showing the 

 symphysis, the difference of level between the alveolar borders, 

 the teeth, and the interdental depressions. Half the natural size. 



Fig. 4. Dorsal vertebra, natural size. C, centrum ; N.c, neural canal ; 

 S.p, spinous process ; T.p, transverse process ; A.z, anterior zy- 

 gomatic process ; P.z, posterior zygomatic process. 



Plate VII. 



Fig. 1. Rib, half the natural size. 



Fig. 2. Longitudinal antero-posterior section through middle of a small 

 tooth and its alveolar border, from right half-mandible, magnified 

 four diameters. A, alveolus ; E, enamel ; D, dentine ; P, pulp- 

 cavity. 



Fig. 3. Transverse section near apex of tooth, as indicated in fig. 2, 

 sect. 3. Magnified 16 diameters. E, enamel ; D, dentine ; 

 P, pulp-cavity. 



Fig. 4. Transverse section just above the cessation of the plica?, magni- 

 fied 16 diameters. See fig. 2, sect. 4. E, enamel ; D, dentine ; 

 P, pulp-cavity. 



Fig. 5. Transverse section immediately below alveolar border, fig. 2, 

 sect. 5. Magnified 16 diameters. D, dentine ; P, pulp-cavity ; 

 p, radiations from pidp-cavity ; t, toothlets ; B, bone. 



Fig. 6. Portion of fig. 5, to show minute structure. Magnified about 

 48 diameters. B, bone ; ex.l, external layer of dentine ; gr.l, 

 granular layer ; Z), dentine, tubular ; j)l, plicae, long and short ; 

 ex.in, external layer infolded ; gr.in, granular layer infolded. 



X. — On a new Genus and Species of Bird belonging to the 

 Family Nectariniictee. By R. Bowdlek Sharpe, F.L.S., 

 F.Z.S., &c, Senior Assistant, Zoological Department, 

 British Museum. 



Dr. Alexander Smith lias very kindly presented to the 

 Museum some birds received by him from Old Calabar; and 

 amongst other interesting species is one which appears to be 

 the type of a new and undescribed genus. I therefore propose 

 to call it 



Lobornis, gen. nov. 



The characteristics may be thus, shortly, described. Very 

 close to Pholidornis, and of the same diminutive size, but 



