240 Letters, Announcements, ^c. 



learn that you have never had an opportunity of consulting 

 Mandt's little Dissertation. As I possess a copy of this some- 

 what rare tract, I can inform you that the author was never in 

 Greenland. He was on board a Hamburg whaler, which, in 

 1821, was fitted out to catch whales in the sea surrounding 

 Spitsbergen, or, rather, in the sea between that country and the 

 east coast of Greenland, — a voyage which is very often called in 

 sailors' language a Greenland voyage, while the fishery on the 

 other side of Greenland was known as the Davis's Strait fishery. 

 I subjoin a copy of his description of Uria mandti, as it is some- 

 what more detailed than the short diagnosis given by Lichten- 

 stein. 



" Mandt, Observationes, &c. Diss, inaug. 1822, p. 30, § 29. 



" Avium quae illis in regionibus deguut jam in prooemio men- 

 tionem feci, quae quum nihil non cognitum exhibere videantur, 

 hie tantum de ea quaedam subiiciam, quam 111. Lichtenstein 

 tanquam novam speciem nomine designavit 



" Uriae Mandtii. 

 " Humanissime mecum sequentes notas communicavit cha- 

 racteristicas quibus insignitur : Rostro elongate gracili, fuligi- 

 noso-atra [_sic\, tectricibus alae remigibusque secundariis apice 

 et margine interno albis. 



" 1.) Longitude a rostri apice 



ad basin uariuni plu- 



matam 1' 0' 



2.) „ a basi narium ad 



verticem 1' 6" 



3.) „ a vertice ad inter- 



scapulium 4' 0" 



4.) „ ab interscapulio 



ad uropygium 4' 2" 



5.) „ ab uropygio ad 



apicem caudae 1' 10" 



G.) „ a rostro ad caudae 



apicem 12' 6" 



" Rostrum uigerrimum, iris aurantiaca, tarsi, digiti cum 

 membrana cinnabarini, unguiculi atri compresso-arcuati, acuti. 



" Simillima Uriae Grylle, Lath., differt ab ea : 1) magnitudine ; 

 2) rostro graciliore, obscuriore ; 3) remigibus secundariis multo 



' 7.) Longitude a flexiu'a alae 

 ad apicem reniigis 

 primae 6' 0" 



8.) „ a flexura alae ad 

 apicem remigum se- 

 cundi ordinis 4' 0" 



9.) „ tarsi 1' 2" 



10.) „ digiti medii cum 



unguiqulo 1' 8" 



11.) „ unguiculi digiti 



medii 0' 5" 



