264 MR. G. E. DOBSON ON THE DIGASTRIC MUSCLE. 



Fi<*. 5. Gymnura rafflesii. United digastrics, showing conditions similar to those described in fig. 4. 

 Fig. 6. Erinaceus europaus. Single digastric muscle, showing an oblique tendinous intersection in a 



position similar to that in Tupaia and Gymnura, but rudimentary and unconnected with that 



of the corresponding muscle of the opposite side. 

 Pig. 7. Epomophorus franqueti. Dissection similar to that shown in fig. 2, showing the position and 



direction of the muscular fibres (see text). 

 Fig. 8. Cercopithecus calRtrichus. Anterior bellies united, and intermediate tendons well developed, 

 tig. 9. Troglodytes niger. Dissection of the infero-lateral side of the neck, showing the positions and 



attachments of the united digastrics (after Vrolik). 

 Fig. 10. Homo sapiens. Dissection showing an abnormal united condition of the digastric homologous 



to that in fig. 8. 



