APRACTOCLEIDUS TERETIPES. 



617 



humerus (gl.) and the surface of union with the coracoid, and the ventral ramus 

 (v.sc), which meets the ventral ramus of the other scapula in the mid-ventral line, 

 the two sending back the posteriorly directed process which passes imperceptibly 

 into the anterior median extension of the coracoids. 



The dorsal rami (d.sc.) are chiefly remarkable for their length and wide spread, 

 and this gives the first intimation that the specimen is an animal of distinctly 

 a B 



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Text-Fig. 7. 



A, Shoulder-girdle of Apraclocleidus teretipes, from above. (Type specimen, V. 1091, about ^ nat. size. ) B, Sboulder-girdle 

 oi Cryptocleidus oxoniensis, from above. (R. 2616, about £ nat. size. After Andrews, 1910, text-fig. 87.) cl., clavicle; 

 cor., coracoid; d.sc, dorsal ramus of scapula ; for., foramen between coracoids; gl., glenoid cavity; p.c.p., postero- 

 external process of coracoid ; se., scapula ; v.sc., ventral ramus of scapula. 



broader build than Cryptocleidus, a fact which is further emphasised by both 

 coracoids and pubes. Each dorsal ramus has suffered a curious fracture just where it 

 leaves the main body of the scapula, so that the end has been slightly displaced and 

 rejoined, while in neither case is the tip complete enough to show how the bone 

 terminated. Just anterior to the above-mentioned fracture, and about 2 cm. from 

 the outer edge of the bone, a roughened ridge rises and runs forward and inward 

 on the ventral side of the bone almost parallel to the margin. This ridge termin- 

 ates close to the edge of the bone near the point reached by the postero-external 

 angle of the clavicle (el.), but a continuation of the line would lead along the 

 TRANS. ROY'. SOC. EDIN., VOL. LI, PART III (NO. 19). 90 



