| OCR Text |
Show 236 MR. G. E. DOBSON ON CAPROMYS MELANURUS. [Apr. 1, basioccipital and basisphenoid bones, and between the parietals. Those of C. prehensilis and C. melanurus, though apparently adult, do not show tbe sagittal crest, as above noted, and their surfaces are altogether smoother; this may be due to sex, for the skull of C. melanurus is that of a female, and that of the other species may also belong to the same sex. The skulls of C. prehensilis and C. brachyurus are in the British-Museum collection, that of C. pilorides in the Hunterian Museum, while that of C. melanurus belongs to the specimen of which the measurements of the body are given above. I. MYOLOGY. Muscles of the Head and Neck. Sterno-faciales (fig. 1, st.f).-On reflecting the integument Fig. 1. Dissection (half natural size) of tbe pectoral and cervical muscles described in the text. a. Acromion; c. Clavicle; c.p. Coronoid process; e.a.m. External auditory meatus; e.j.v. External jugular vein ; m-m'. Masseter; s.g. Submaxillary gland. covering the under surface of the neck and thorax these large muscles come into view. They arise together from the centre line |
