MR. W. K. PARKER ON THE OSTEOLOGY OF BAL^NICEPS REX. 



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Group 3. — The great fronto-maxillary hinge is here composed of splint-like laminae of 

 the nasal processes of the pre-maxiliaries and nasals, which overlap the sphenoido-fron- 

 tals ; or the lacrymals and sphenoido-frontals are adapted to the contiguous bones of 

 the facial sclerotome by a dentate suture, the margin of the hinge being more or less 

 synovial. The rostrum of the basi-sphenoid in this group is either patched on each 

 side or completely covered with synovial cartilage for a definite extent, on which 

 lubricated space the pterygo-palatals glide. Vomer variable. 



Examples : — 



Afpiilirue (Eagles). 



Accipitrince (Hawks, Falcons, Harriers, Kites, 



Buzzards). 

 VulturiruB (Vultures). 

 Serpentarius (Secretary-bird). 

 Podargus humeralis (Giant Goatsucker). 

 Alcedo ispida (Common Kingfislier). 

 Dacelo giyanteus (Giant Kingfisher). 

 Cuculus canorus (Common Cuckoo). 

 Phcenicophmts (a Cuculiue genus). 

 Pieus viridis (Green Woodpecker). 

 Trochilus coluhris (Humming-bird). 

 Sylviince (Soft-billed Songsters). 

 Passerinm (Hard-billed Songsters). 

 Corvina (Crow- tribe) . 

 Lophyrus cristatus (Crowned Pigeon). 

 Didus ineptus (Dodo). 



Didnnculus striyirostris (Owl-billed Pigeon). 

 Hamatopus ostraleyus (Oyster-catcher). 

 CEdicnemus crepitans (Stone Curlew). 

 Platalea leucorodia (Spoonbill). 

 Otis tarda (Great Bustard). 

 Grus americana (American Crane). 

 Grus pavonina (Crowned Crane). 



Cicoma alba ("White Stork). 



Balceniceps rex (Shoe-bill). 



Cancroma cochlearia (Boat-bill). 



Ardea cinerea (Heron). 



Botavrus stellaris (Bittern). 



Phcenicopterus ruber (Flamingo). 



Rallus (Rail). 



Gallinula chloropus (Water-hen). 



Fulica atra (Coot). 



Tribonyx ynortieri (Native Hen). 



Brachypteryx aiistralis (Short-winged RailV 



Podiceps (Grebe). 



Colymbiis (Diver). 



TJria (Guillemot). 



Aha (Auk). 



Eudyptes demersa (Penguin). 



Sula bassana (Gannet). 



Phalacrocorax carbo (Cormorant). 



Pelecanus onocrotalus (Pelican). 



Sterna (Tern). 



Larws (Gull). 



Procellaria (Petrel) . 



Diomedea exulans (Albatros). 



Group 4. — Fronto-maxillary hinge more or less splint-like and elastic, palatines 

 loosely connected with basi-sphenoid. Near the anterior end of the pterygoid there is, 

 on its inner surface, an oval, flat-faced, elevated process, which looks upwards and in- 

 wards, and which is articulated to an exactly similar process on the basi-sphenoidal 

 rostrum ; this latter process being the well-known ento-pterapophysis of the post- 

 sphenoidal centrum — the homologue of the internal pterygoid plate of the Mammalia 

 and Man. Vomer variable. 



Examples: — ^The typical Gallinaceous genera, e.g., Pavo cristatus, Meleagris gallo- 

 pavo, Talegalla, Gallus, Perdix, &c. 



The Lamellirostres, e. g., Anas, Querquedula, Rhynchaspis, Mergus, Anser, Cygnus ; 

 certain Fissirostres, e. g., Caprim.ulgus europaus, Cypselus apus, and the one of the Pro- 



VOL. IV. PART VII. 2 s 



