RATA, 327 
possibly be homologous with the transverse processes and 
ribs of the trunk-portion, respectively. 
2. PERIPHERAL.—(1) The anterior or pectoral element 
consists of a pectoral girdle and pectoral fin. The girdle is 
a single piece of cartilage which has a ventral ‘“coracoid 
bar” across the ventral middle line, and expanded lateral 
Fig. 233.—DorsaL VIEW oF PECTORAL GIRDLE AND FIN OF THE 
SKATE. (4d zat.) 
Fin-rays. 
Propterygium, 
Coracoid 
Fontanelle., | Mesopterygium. 
oracoid. 
Anterior Facet. 
Middle Facet. 
Posterior Facet. 
Scapula, 
Scapular Fontanelle. 
Metapterygium. .- 
portions. Each of these is pierced by three foramina and 
bears three glenoid facets. Dorsal to these a portion, the 
Scapular cartilage, is bent towards the middle line and 
attached to the vertebral column by ligament. Articulated 
