THE At^x'tii<m: 



375 



foraniiiia, probably tor the passage of uutritient 

 vessels to the substsnce the gland. This 

 ^mi h Ibtind in mo^ If i^t m the aquaic 



birds, but vaiies in them, both with respect to 

 t'xact ^itnatioe or extent. On the dissection of 

 the common duck, 1 found it, not imbedded in 

 a bony cavity, but situated on a dense fascia, 

 slightly projecting orey the stiperfor *«jd pti®- 

 terior margins of the orbit. It is similarly situ- 

 ated in tlie ht)o1)ies and others. In tlie Cape 

 petrel (Pro(Tlia/ 'fa (JajX'ns'ts) tlii:< gland is situ- 

 ated partly in a narrow semilunar depression 

 m&t -tike ^hit, and partly m ^ dxm&im^is^m^f 

 coiiikuim §mk ^kt mm^t of Mb hmjmv^^ 



extending from two orbital processes, serving to 

 complete the sii|(erior part of the orbit on which 

 the gland rested. A dense fascia covers the 



gland^ whmh fascia i& fiot eoniliittoit^ ov^ &e 

 ol^er part th«E M&dt Imt im^ Ih^ glands 



firmly down in tlicir situation. 



In the gull tril>e (Lcn^us) it is situated in a 

 bony depression over the orbit, but more super- 

 fiiefel ibim lit the Albatross, and extends m&t tb# 

 craniunij so as nearly, if not aetnalfyy touch 

 tlie gland on the opposite side, and botli ex- 

 tending so as to cover the anterior part of the 

 cranium. 



It is difficitlt tcj conjecture the im of this 



