488 REPORT OF NATIONAL MUSEUM, 1898. 



only; supporting two lucmal ribs at its i)osterior extremity. Clavicles 

 long, slender, extended well anteriorly, simple and in contact distally. 

 Coracoid, precoracoid, and scapula, osseous, confluent. Goracoid carti- 

 lage not reaching precoracoid. 



Pelvic arch. — Ilium elongate, proximal half horizontal, parallel with 

 three vertebra:^; distal i)ortion decurved and confluent with pubis and 

 ischium. Latter elements both rudimental, widely separated on the 

 median line. Hypogastroid cartilage represented by a slender rod 

 extending posteriorly on each side from the position of the acetabulum. 

 Perhaps these cartilages represent the ischia, but they are possibly 

 present with ischia in Oplieocles. 



Posterior limb. — This consists of femur, tibia, and fibula, and four 

 metatarsals, all inclosed in a common integument. It is about as long 

 as the ilium. 



My observations on this genus agree with those of Fiirbringer 



ANGUID^. 



Opli'maitroidea, Clialcidoidea, Anguinoidea F'itzinger, part, Neiie Classif. Rept., 



1826, pp. 20, 24. 

 AntarchorjJossce Wagler, part, Syst. Amph., 1830, p. 152. 

 rtycliopJeuri, Scinci Wiegmaxn, part, Herp. Mex., 1834, pp. 29, 35. 

 Chalcidiens, Scincoidiens Dumeril and Bibron, part, Erp. Gen., V, 1839, p. 318. 

 Zonurida', Scinctda; Gray, part. Cat. Liz., 1845, pp. 5, 45, 70. 

 Angiiida, Gerrhonotida' Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 228. 

 Amjntdw Boulenger, Ann. Mag. Nat. Hist. (5), XIV, 1884, p. 119; Cat. Liz. Brit. 



Mas., 2d ed., II, 1885, p. 265. 



Boulenger's description is as follows: 



The tongue is comjjosed of two distinct portions — a principal posterior, thick, 

 covered with villiform papillae; and a small anterior, thin, emarginate, covered with 

 lepidoid imbricate papilla", extensible and more or less retractile into a sheath 

 formed by a transverse fold at the anterior extremity of the villose portion. This 

 retractility of the distal part of the tongue appears to be constant, though more 

 accentuated in some species than in others; but it should be borne in mind that 

 when the tongue is fully extended, every trace of the transverse fold or sheath dis- 

 appears, which accounts for the seeming exceptions presented by spirit specimens 

 in that condition. 



The dentition varies from the strictly pleurodont tubercular teeth of I'seudopus 

 apns and some THpIoglossi, through the conical teeth of the majority of species, to 

 the curved fangs of Angnis. The dentition of the latter has no other equivalent but 

 that of Uelodcrma, to which it bears considerable resemblance; and Leydig has even 

 discovered the presence of a slight groove along the anterior surface of the teeth 

 which appears to be homologous -with the anterior groove of the poisonous lizard's 

 fangs; the teeth of Anguis are likewise remarkable for the comparatively feeble 

 attachment to the jaws, as in Reloderma and the snakes. The new teeth do not hol- 

 low out the base of the old ones, but originate between them. The palate is either 

 toothless, or teeth may be developed on the pterygoids or even on the palatines and 

 vomers (Ojyhisaurns). 



The skull belongs to the normal Saurian type. The premaxillary is single; 

 nasals distinct; frontal single in Ge/T/iono/«s, double in the other genera; parietal 

 single; palatines and pterygoids well separated along the medial line; infraorbital 

 fossa bounded by the palatine, pterygoid, transverse bone, and maxillary. Dermal 

 cranial ossifications are present, which roof over the supratemporal fossa. The limbs 



