Viscount Waltlen on (ico new Species of Birds, 123 



sutures. I propose, therefore, to keep the name Amicida for 

 the Ah^skan pore-bearing species — and to name this (with the 

 Alaskan PaUasii) Stimpsoniella, in honour of one of the best 

 naturalists born in New England. In this genus, as in Tra- 

 cliydermon^ the faeces are expelled through slits close to the 

 caudal lobe, one on each side. When at rest, the creature 

 makes a posterior fold in the girdle, corresponding to the wave 

 in the posterior valve. 



I should be extremely indebted to any gentlemen who would 

 lend me unusual Chitons for examination, previously to the 

 ])ublication of my ' Conti'ibutions towards a Monograph of the 

 Chitonida3 ' by the Smithsonian Institute. There is also a 

 great field open for investigation to all those who can examine 

 living Chitons or even dissect alcoholic specimens. It is 

 knoAvn that the external characters are not coordinate with 

 the internal ones; it remains to be found out whether either 

 of them correlate Avith the anatomical characters of dentition, 

 gills, vent, &c., Avhich ought to furnish the best divisions in 

 an-anging this difficult group. 



XVII. — Descriptions of two new Species of Birds. 

 ' By Arthur, Viscount Walden, P.Z.S., F.R.S., &c. 



Pelargopsis gigantea^ n. sp. 



Head, nape, chin, cheeks, back and sides of the neck, flanks, 

 under tail-coverts, and entire under surface white, washed more 

 or less Avith dilute fulvous, the concealed parts of the feathers 

 being pure white and their exposed ])ai-ts being tinged with 

 fulvous ; this hue is deepest on the flanks, breast, and on the 

 abdominal and ventral regions, and on the under tail-coverts ; 

 croAvn nearly pure Avhite ; middle and loAver part of the back 

 rich pale glistening turquoise-blue ; outer edges of primaries 

 and secondaries, and all the- tertiaries and scapulars, dingy 

 bluish green ; middle pair of rectrices above entirely, and 

 lateral pairs on their outer Avebs, of a purer blue ; under Aving- 

 coA'erts and axillaries fulvous, somewhat deeper than that of 

 the flanks ; bill coral-red ; feet red. 



Bill from forehead 3*25 inches, Aving G"G2, tail 4-50, tarsus 

 0-88, middle toe 1-50. 



Obtained at Salok, Sulu Islands, near Borneo, by Dr. 

 Beruhard ^leyer. 



Scops modestus^ n. sp. 

 Srift' loral bristles pure white at base, some ti])ped Avith 



