1893.] BIRD-BOJfES FROM THE MIOCENE OF ISERE. 521 



is upwards of 0,OoO mm. ; and this must for the present serve as 

 the distinctive feature of this species. 



Pal^oettx GRiVEJfsis, u. sp. (Plate XLI. iig. 12.) 



The right humerus (represented in fig. 12) indicates a species 

 of the size of the Common Quail, and somewhat inferior in 

 this respect to P. hrevipcs, which is the smallest of the AUier 

 representatives of the genus. Thus, whereas in the present speci- 

 men the length is 0,0337 mm., in the corresponding bone of 

 P. brevipes it is 0,0357 mm. On account of this inferiority of size, 

 coupled with its much higher geological horizon, I am disposed to 

 regard the present specimen as indicating a distinct species, which 

 I assign to Palceorti/.v, with the name of P. grivensis. Compared 

 with the nearly equal-sized humerus of Cotumix, this specimen 

 exhibits very clearly the distinctive features between the two 

 genera. Thus whereas in the Quail the subtrochanteric fossa is 

 much larger than the shallow tricipital fossa, and extends beneath 

 it, in Palceorty.v the latter is much the larger of the two, and is 

 of such a depth as to prevent the former from extending beneath it 

 towards the outer side of the bone. 



Pai^ortxx, sp. inc. (Plate XLI, fig. 13.) 



Seeing that in the Common Quail the humerus is of almost 

 exactly the same length as the corresponding bone of P. grivensis, 

 while the tarso-metatarsus measures only 0,027 mm. in length, it 

 would seem impossible that the tarso-metatarsus now exhibited 

 (see fig. 13), of which the length is 0,032 mm., can belong 

 to the species last named. I accordingly regard it as probably 

 indicating yet another species of the genus from La Grive, nearly 

 of the same size as P. brevipes of AlUer, but to which I do 

 not consider it advisable to assign a distinct name. In its com- 

 parative flatness, as well as in the straightness of the hypotarsus 

 and the depth of the external posterior groove, this bone exhibits 

 all the features characteristic of PalcBortyx as distinct from 

 PalcBoperdix. 



ToTANUS MAJORi, n. sp. (Plate XLI. fig. 14.) 



From the presence of a distinct triangular ectepicondylar process, 

 the small left humerus (represented in fig. 14) is clearly referable 

 to the Gavise, Limicolse, or Tubinares. Prom the corresponding 

 bone of the more typical Laridce it is readily distinguished 

 by the smaller size of the tricipital fossa ; while it difFers from 

 that of Sterna in the larger size of the ectepicondylar process. 

 Compared with a skeleton of the Yellow-footed Salidpiper (Totanus 

 jiavipes), it is found to agree so closely with the humerus that 

 there can be little hesitation in referring it to a member of the 

 same genus. The total length is 0,037 mm., or about one-fourth less 

 than that of the corresponding bone of the species above-named. 

 A small species of Totanus from the AlLier Miocene has been named 

 T, lartetianus by Milne-Edwards ; but as the higher geological 



