SKELETON OE PHOEORHACOS INFLATUS. 



85 



change, while the smaller more generalized Cariama and Chunga, or rather their 

 ancestors, survived. In fact, it appears that Phororhacos stands in somewhat the same 

 relation to the Cariamidae that such forms as Glyptodon and Panochthus stand to the 

 modern Armadillos. 



All the specimens described are from the Santa Cruz Beds of Monte Observation, 

 Patagonia. The age of these deposits is doubtful, but they probably correspond to 

 some part of the Miocene of the Northern Hemisphere. 



EXPLANATION OF THE PLATES. 



PLATE XIV. 



Skull and mandible of Phororhacos inflatus Amegh., p. 56. From side. § nat. size. 



PLATE XV. 



Skull of Phororhacos inflatus 



Fig. 1. From below, § nat. size. Fig. 



b.pt. Process of pterygoid articulating o.q. 



with base of the skull, p. 57. pal. 



b.t. Basitemporal platform, p. 57. P c -f- 



eth. Ethmoid (?), p. 60. p.mx. 



i.f. Facet for inner head of quadrate, p.orb.p. 



p. 58. pt. 



i.o.s. Interorbital septum, p. 59. q. 



lac. Lacrymal, p. 58. q.j. 



l.r. Lambdoidal ridge, p. 58. r. 



m.t. Marnmillary tuberosities, p. 57. sq. 



max.pal. Maxillo-palatine plates, p. 62. sup.o. 



n. Nasals, p. 59. ty. 



oc.c. Occipital condyle, p. 57. zy. 



o.f. Facet for outer head of quadrate, p. 58. 



Amegh., p. 56. 



. 2. From above. § nat. size. 



Orbital process of quadrate, p. 63. 

 Palatine, p. 62. 

 Precondylar fossa, p. 57. 

 Premasilla, p. 61. 

 Postorbital process, p. 58. 

 Pterygoid, p. 62. 

 Quadrate, p. 82. 

 Quadrato-jugal, p. 60. 

 Rostrum, p. 57. 

 Squamosal, p. 58. 

 Supra-orbital plate, p. 59. 

 Tympanic cavity, p. 57. 

 Zygomatic process, p. 58. 



PLATE XVI. 



Pelvis of Phororhacos inflatus Amegh., p. 72. 



Fig. 1. From above. 



acet. Acetabulum, p. 74. 

 a.t. Ante-trochanter, p. 73. 

 il. Ilium, p. 75. 

 is. Ischium, p. 75. 

 is.f. Ischiadic foramen, p. 74. 



Fig. 2. From side. 



i nat. size. 



Fig. 3. From below. 



o.f. Obturator foramen, p. 74. 



p. Pubis, p. 76. 



s. Sacral vertebrae, p. 72. 



u.s. Urosacral vertebrae, p. 73. 



