774 MESSRS. O. THOMAS AND K. C. WROUGHTON ON [ISToV. 12, 



EXPLANATION OF PLATES XLIII.-XLVI. 



SCALES OF FISH. 

 Repeeence Lettees. 



he, bone-cell ; bt, branching canaliculus ; cc, branching cosminc canaliculus!; 

 d, denticle ; e, enamel-like layer ; ed, growing edge of scale ; g, line marking growing 

 edge at an earlier time ; gn, ganoine ; Iw, horizontal vascular canal ; i, inner bony- 

 laminae of isopedine ; ir, inner and older region ; U, inner laminated layer ; o, outer 

 ornament of ridges and spines; oe, outer cavit.y; oZ, outermost or newest layer; 

 pc, pulp-cavity ; r, ridge ; sp, spinelet on surface ; t, tubercle ; tu, tubule with 

 branching inner end ; -yc, vascular cavity ; ■ye/;, vascular chamber ; «?, vascular layer; 

 vtc, vertical vascular canal. 



Plate XLIII. 

 Fig. 1. Enlarged outer view of scales on the head of Tkelodus. 



2. Similar view of scales on the tail of Thelodus. 



3. Fragment of a plate oi J? sammosteus paradoxus Ag. Enlarged. 



4. Vertical section of a plate of Psammosfeus arenatus Ag. Enlarged, cam. 



5. Section through the edge of a scale of Osteolepis macrolepidotus Ag.. 



Enlarged, cam. 



Plate XLIV. 

 Fig. 6. Section of a scale of E^istlienopteron foordi Wh. Enlarged, cam. 



7. Section through the broken edge of a scale of BJiizodus sp. Enlarged, cam. 



8. Similar section of a scale of Mliizodus ornatus Traq. Enlarged, cam. 



9. Oblique view of surface of cleithrum of Po?,yj9#erMS S«>7i«r G. Enlarged. ' 

 Figs. 10 & 11. FJianeropleuron curtum Wh. ; sections of scale. Enlarged, cam. " 

 Fig. 12. Section of gular plate of Ccel acanthus sp. The outer cavities, oc, 'are 



covered over with a thin shiny layer. Enlarged, cam. 



Plate XLV. 



Fig. 13. Horizontal section, nearly parallel with the outer surface, of a scale of 

 Cheirolepis sp. Enlarged, cam. 



14. Siirface views of the scale of Rliizod^is ornatus Traq. A, Anterior edge of 



scale ; B, posterior exposed region. Enlarged. 



15. Outer region of sections of scale of Gonatodus sp. A, oblique : ganoine not 



shown. B & C, vertical to surface ; B, towards centre of scale ; C, at 

 edge. Enlarged. 



Plate XLVL 

 Fig. 16. Fragment of bony layers of scale of Lepidosteus osseus L. Enlarged. 



17. Central portion of vertical section of scale of JELeterolepidotus latus Eg. 



Enlarged, cam. 

 IS. Section through a cranial plate oii Amia- calva. Enlarged, cam. 



19. Section through a scale of Aspidorhynclms sp. Enlarged, cam. 



20. Section through the edge of a scale of ISugnathus sp. Enlarged, cam. 



21. Section nearlj^ parallel with the surface of a scale of Acanthodes sp. 



Enlarged, cam. 



2. The lludd Exploration of South Africa.— YIII. List of 

 Mammals obtained by Mr. Grrant at Beira. By Oldfield 

 Thomas, F.R.S., and U. C. Wkoughton, F.Z.S. 



[Received July 18, 1907.] 



Long as the region of Beira and the Pungwe River has been 

 known as a paradise for sportsmen, no scientific collection of 

 mammals appears ever to have been made there, and certainly 

 our own National Museum has never received any specimens 

 from the district. Consequently the present collection, obtained 



