46 CARINAT.IO. 



Family PHALACROCORACID.'E. 



The osteological characters arc given under the heading of the 

 various genera. 



Genus SULA, Brif;son \ 



Compared with Pludacrocorax, the following points of difference 

 may be noticed : — 



The rostrum is broad and rounded, with slight lateral grooves. 

 The tarso-metatarsus and tibio-tarsus are much thicker, the talon 

 of the former being smaller. The humerus is longer, with the 

 surface for the brachialis anticus situated in a deep palmar depression, 

 and the radial condyle is less hooked. The ulna has a foramen at 

 the proximal extremity of the palmar surface. 



The pelvis (upon the evidence of which the extinct species have 

 been determined) has nearly the same elongation as in Phalacrocora.v, 

 but is at once distinguished by the absence of the lateral expansion 

 of the anterior part of the ilia. 



^ula pt£ifator (Linn.'). 

 Syn. Pelecanns piscato); Linn.^ 

 Hah. Pacific. 



A. 153. The imperfect skull ; from the superficial deposits of the 

 island of Eodriguez. Accords exactly with recent speci- 

 mens from the same locality. No history. 



Sula arvernensis, I^Tihie-Edwards *. 

 The pelvis still navrowei- than in the existing 8. bassana, more especially in 

 the postacetabular region. 

 Hab. Europe (France). 

 From the Lower Miocene (Upper Oligocene) of the Auvergne. 



Sula ronzoni (Gervais ^). 



Syn. Mergus ronzoni, Gervais '^. 



Distinguished from the preceding by the form of the iliac fossae, which are 

 somewhat more dilated anteriorly and more constricted near the acetabulum. 



Rab. Europe (France). 



From the Lower Miocene (Middle Oligocene) of Ronzon, near Puy-en-Velay. 

 See Milne-Edwards, ' Oiseaux Fossiles de la France,' pi. xUv. 



' Ornithologie, vol. vi. p. 494 (1760). 



2 Syst. Nat. ed. 12, vol. i. p. 217 {nm).—Pelccanus. ^ hoc. cit 



^ Oiseaux Fossiles de la France, vol. i. p. 267 (1837-68). 



^ Mem. Act. Montpellier, vol. i. p. 220 {\Sa\.).—Mergm. " Loc. cit. 



