Page 418 
420 ON THINOCORUS AND ATTAGIS. 
the other most intimately, and differ from one another to almost 
exactly the same amount as the Chionidide do from either. I should 
place the Chionidide, the Laride, and Alcide in sequence as members. 
of the Limicole *; and such being the case, their intimate affinities 
with the Thinocorine scarcely need further notice. The bifid vomer 
of Numenius arquatus, as shown in fig. 3, p. 419, closely resembles that — 
of most of the Limicole proper. The vomer is always sharp-pointed 
in the Larine, as in Sterna hirundo (fig. 1, p. 419), with which Chionis 
generally agrees. } 
In Cursorius and Glareola the vomer is not expanded laterally. 
In them, however, there is an absence of pterygoid facets for articula- : 
tion with the basisphenoid rostrum, together with a general resem- 
blance between their palates and those of the Thinocorine. In their 
myology these genera do not differ in any essential points from Thino- 
corus and Attagis; and it is with these that I cannot help thinking 
that Thinocorus and Attagis are most allied. Not in any of these 
genera are the pair of supraoccipital foramina to be found, which are 
present in nearly all the Charadriide and the Gruide. 
* Vide “ Proceedings of the Zoological Society,” 1874, p. 123. (Supra, p. 221.) I 
may here mention that Dr. Coues’s account, in the above-quoted paper, of the myology 
of Chionis minor is incomplete as far as the varying muscles are concerned ; and I 
may add that in both species the ambiens muscle is of fair size, the external vastus 
covers the biceps cruris, the femoro-caudal with its accessorius and the semitendi- 
nosus with its accessorius are well developed. The internal obturator is oval; and 
there is a slip from the biceps humeri to the patagium. There are two carotid 
arteries, and intestinal ceca, 5 inches long in C. alba, 6 inches in C. minor. 
Pe 
le 2 
sit diated 
