PLATE LX. 



Figs. 1-8. Skull oi Halosaurus macrochir (page 233). 



Lateral view of the skull with the infraorbital chain and other superficial bones. 

 Lateral view of the .skull with the superficial bones removed. 

 Upper view f)f the skull, with the lateral membrane bones removed on the left 

 side. 



Anterior part of the snout, upper view 



Lower view of the cranium . 



6. Anterior part of the snout, lower view 



Side view of the cranium. 



Fig. 8. Occipital view ; enlarged. 



a. Facet for the articulation of hyomanrlibular. 



an. Anterior nasal. 



/). Basal. 



Iio. Basioccipitiil. 



cL Clavicle. 



CO. Coracoid. 



rp. Lateral prseorbital pvaccs.s nf piimordial 

 cartilage, 



c. Groove of the transverse process of the eth- 



moidalc medium. 



ec. Anterior termination of ethmoid cartilage. 



frp. Ectoptorygoid. 



prp'. Condyle of th? etlmidid cartilage for the 

 articidatioii of the ectopterygoid. 



em, mi. Ethmoidale medium. 



''p. Entopterygoid. 



I'j-o. Exoccipital. 



hm. Hyomandibulai-. 



/. Frontal. 



im. Intermaxillary. 



to. Interopereulum. 



twice natural size. 



twice natural size. 



/iff. Ligament between the ectopterj'goid and 

 lower jaw. 



m. Maxillary. 

 nip. Metapterygoid. 



n. Xasal. 



0. Operculum. 



p. Parietal. 

 pal. Palatine. 

 paro. Paroccipital. 

 2W. Alisphenoid. 

 pr. Prfeoperculum 

 pt. Ptcrotic. 



'/. (Quadrate. 



r. Eostrale. 

 »f. .Scapula. 

 sd. Sujiraclavicle. 

 no. Suboperculum. 

 xpo. Supraoccipital 

 sq. vSquamosal. 

 «/. Symplectic. 



V. Vomer. 



Figs. 9-15. ^kuW oi Notacanfhvs .sexspinis 



y. Lateral view of the skull. 

 Fiff. 10. Lateral view of the cranium. 

 Fig. 1 1. Upper view of the cranium. 



Fio 



Fie. 



12. 



13. 

 Fig. 14. 

 Fis. 15. 



Fig 



Lower view of the cranium, 

 i^alatal arch with suspensorium and lower jaw 

 Back view of r-ranium ; twice natural size. 

 Front view of .snout : twice natural size. 



twice natural size. 



h. Ba.sal. 



ho. Basioccipital. 



hr. Brauchiostegals. 



cl. Clavicle. 



no. Coracoid. 



PC. Ethmoidal cartilage. 



ecji. Ectopterygoid. 



iin. Ethmoidale medium. 



<7>. Entopterygoid. 



/. Frontal. 



hm. Hyomandibulare. 



im. Intermaxillary. 



in. Interopereulum. 



TO. Maxillary. 



n. Nodule of cartilage. 



II. Operculum. 



J I. Parietal. 



pal. Palatine. 



po. Alisphenoid. 



pi: Pra3operculum. 



r/. Quadrate. 



r. Rostrale, with / 



.If. Scapula. 



Kcl. Sujiraclavicle. 



xo. Suboperculum. 



1^10. Supraoccipital. 



.if. Stylobyal. 



Ki/. Symplectic. 



////. Urohyal. 



its cartilaginous portion. 



