ALC.E 



361 



the extensors of the fore arm to be inserted on to the ulna ; 

 the anterior of these bifurcates in the limicoline fashion 

 just in front of its insertion, and here a very faintly marked 

 fan l (FiJEBEiNGEE) connects it with the longus. 



Synthliborhamphus antiquus is in some respects even 

 more simple. 2 



There is but one brevis tendon, from which just as it 

 passes over the extensor of the fore arm the merest apology 

 for a forward branch exists ; 

 from this branch arises a 

 special muscular belly of 

 the extensor metacarpi (cf. 

 Petrels). There is no 

 patagial fan, but a special 

 slip, found in all the other 

 members of the family (and 

 also occurring in Lanix 

 argent at us), runs from the 

 longus tendon to the op- 

 posite side of the fore arm 

 to that upon which the 

 patagial fan, when present, 

 is inserted. 



In Bracliyrliamplius 

 marmora tus three separate 

 and parallel tendons arise 



FIG. 175. TENSOKEM FATAGII OF Ccrato- 

 rliinu inoiiocerata (AFTER BEDDARD FROM 

 FOBBES). 



from tensor patagii brevis muscle, of which the anterior is 

 the strongest and alone passes to the ulna. From a small 

 wristward slip arise a few fibres of the extensor metacarpi, as 

 in the last species. There is no patagial fan, but an ulnar slip, 

 which gives off a branch running back to the humerus. In 

 Uria columba there is the same. 



. In Lunda cirrhata there are but slight differences ; the 

 two most anterior of the brevis tendons cross the extensor 



1 Not figured at all by GARROD in a MS. sketch. 



- For various details in anatomy of soft parts see BEDDARD, ' On the Anatomy 

 of a Grebe (JEclimopliorus ii/rijor), with Remarks upon the Classification of 

 some of the Schizognathous Birds,' P. Z. S. 1896, p. 538. 



