Vol. 69.] SKELETON OF OBNLTHODESMUS LATIDENS. 421 



Fig. 4. Ventral view of the notarium : A, anterior end. X i. 



5. Restoration of the notarium, right lateral aspect: F, F, foramina; 



fa., facet for the scapula; A, anterior end. X §. 



6. Inner view of the left scapula, minus a moiety of the humeral end: 



gl., glenoid cavity ; ae.pr., acromion process. B.M. R/3877. X 5. 



7. Humeral end of the right scapula and perfect coracoid : sc., proximal 



end of scapula; cor., coracoid ; gl., glenoid cavity; ad.ar. sur., ad- 

 ditional articular surface, placed at right angles to the glenoid 

 cavity. B.M. R/3878. X i- 



Plate XXXIX. 



Fig. 1. Portion of the right humerus, exhibiting the spiral curve of the deltoid 

 crest: dl.cr., deltoid crest; /., fragment of bone attached to the 

 shaft of the humerus. B.M. E/176. X i. 



2. Restoration of the humerus : dl.cr.. deltoid crest ; ep., an epiphysis 



overlapping the shaft ; /•/., ridge for muscle-attachment, x £. 



3. Distal articulation of the left humerus : /'., circular foramen into shaft ; 



tr., trochlea for the radius; v., vallev for the ulnar ridge. B.M. 

 R/3877. x |. 



4. Proximal articulation of the left ulna : 11., transverse ridge for arti- 



culation in the valley on the distal articulatorv surface of the 

 humerus. B.M. R/3877. X |. 



5. Dorsal view of the right radius and ulna, showing decussation : 



B., radius; Equina; ri., ridge. B.M. R/3877. Xj. 



6. Ventral view of the left radius and ulna: R., radius; U., ulna; 



fa., articulatory surface articulating with the proximal carpal; 

 ri., ridge. B.M. R/3877. X i- 



7. Distal articulation of the ulna: A, circular pit; B, oval convex 



condyle ; C, articular surface prolonged on to the shaft of the ulna. 

 B.M. R/3877. X L 



8. Proximal articulation of the proximal carpal: A, hemispherical knob; 



B, oval concavity ; C, articular surface for articulation with that 

 on the ulna marked C in fig. 7 ; B, elongate cavity for the radius ; 

 E, small concavity. B.M. R/3877. X i. 



9. Distal articulation of the distal carpal : A, articular facet below the 



main articular surface; B, main articular surface; C, articular sur- 

 face for small metacarpals ; B, deep circular cavity. B.M. R/3877. 

 Xl 

 10. Proximal articulation of the wing-metacarpal : A, articular facet below 

 the main articulation ; B, main articular surface; C, the position of 

 the small metacarpals is within this space. B.M. R/3877. X i. 



Plate XL. 



Fig. 1. Right pteroid bone : B.M. R/3877. X h 



2. Upper view of Atherfield specimen No. 2 : h.r., distal end of the right 



humerus ; r.r., proximal end of the right radius ; u.r., proximal end 

 of the right ulna ; h.L, distal end of the left humerus ; W.mc:, distal 

 end of wing-metacarpals ; s.b., small bone, apparently articulating in 

 semicircular emargination (s.c.e.) on the first wing-phalange, 1. W.ph. 

 B.M. R/3878. x J. 



3. Left lateral view of the sternum : cor.ar.fa., coracoid articular facets. 



B.M. R/3877. X £. 



4. Slightly oblique anterior view of the sternum, to exhibit coracoid facets : 



cor.ar.fa. B.M. R/3877. X i. 



5. Restoration of the dorsal outline of the sternum : A, anterior end. X §• 



6. The right ischium : «t\, part of the acetabular rim. B.M. R/3877. X 5. 



7. The right femur, distal end partly destroyed : B.M. R/3877. X |. 



