Zoological Society, 367 



on the joints ; upper surface of the toes scutellated ; nails powerful, 

 and not much curved ; the nail of the centre toe impectinated. 



Baljeniceps Rex. 



Bill pale yellow, becoming horn-colour on the culmen and tip, and 

 blotched with dark brown ; orbits pale yellow ; head and neck slaty 

 grey, darkest on the crown ; chest ornamented with lanceolate feathers 

 of a similar colour, with a dark stripe down the centre ; abdomen, 

 flanks, thighs and under tail-coverts very pale grey ; upper surface 

 generally very dark grey, most of the feathers margined with light 

 grey ; primaries, secondaries and tail blackish grey ; rump and upper 

 tail-coverts light grey ; legs greyish black. 



Total length, from the tip of the bill to the extremity of the tail, 

 52 inches ; from the tip of the bill to the end of the centre toe, ^7 ; 

 bill, from the gape to the tip, 9 ; depth of the bill, 4f ; breadth, 4 ; 

 wing, 27 ; tail, 12 ; tibiae, 13 ; tarsi, 10 ; middle toe and nail, 7 ; ex- 

 ternal toe and nail, 6^; internal toe and nail, 5^; hind toe and nail, 4. 



Hab. The upper part of the White Nile, in Eastern Africa. 



Remark. — This is evidently the Grallatorial type of the Felecani- 

 d(B\ at least such is the conclusion to which I am directed after a care- 

 ful examination and comparison of it with Pelecanus, Grus, Ardea, 

 and Cancroma^ to none of which genera is it so nearly allied, except in 

 general contour, as to Pelecanus. Perhaps the most singular feature 

 connected with this form is the entire absence of interdigital mem- 

 brane, a character so conspicuous in the Storks, Herons, and the Boat- 

 bill, which latter bird is as nearly allied to Nycticorax as the present 

 bird is to Pelecanus. Both Cancroma and Nycticorax have the nail 

 of the centre toe strongly pectinated, which character is not found in 

 Pelecanus nor in Balceniceps. 



2. Descriptions of twenty species of CoLUMBELLiE, and 



ONE SPECIES OF CyPR^A. By J. S. GaSKOIN. 



1. CoLUMBELLA TENUIS. Testa pyramidalisy subventricosa, 

 Icevis, tenuis, albicans, maculis irregularibus fuscis maynis 

 longitudinaliter dispositis ; anfractibus octo, duobus anticis 

 gibbosis ; spird subelongatd, acuminatd ; aperturd laid, antich 

 divergente, postice acuminatd, labia externa tenui, internaque 

 edentula, varice externa subelevata ; striis tenuibus ab varice 

 antice continuis ; canali brevi. 



Length, -^^ of an inch ; width, -^^ of an inch. 

 Hab. ? Cab. Gaskoin, specimen unicum. 



2. CoLUMBELLA ALBiNODULOSA. Tcsttt oblongo-ovata, palli- 

 dissime luteo-fulva, fasciis angustis interruptis tribus brunneis; 

 spird acuminatd, anfractibus septem ; nodulis latis prominenti- 

 bus subdistantibus albi-caronatis ; aperturd oblongd subqua- 

 dratd albd; labia externa crassa, recta, submarginata, intus den- 

 ticulata ;' dentibus posticis majaribus, labia interna dentibus 

 h'regularibus subvaricosis ; canali recto latiusculo subelongata. 



Length, -^^^ of an inch ; width, ^^ of an inch. 

 Hab. ? Cab. Gaskoin. 



3. CoLUMBELLA iNTERRUPTA. Tcsttt oblonga-ovata, albicans, 



