36 



bulletin: museum of comparative zoology 



mandibular ramus near the median line and its insertion on the basi- 

 hyal.^f In section it appears as a median part of m. cerato-mandi- 

 bularisj,!, except anteriorly, where it extends forward beyond the 

 origin'of the latter. 



■ kpr-md. i 



sin ky 



gen gh 



ker-brn. z 



omo-hy. prf. 



Fig. F. — Ventral aspect of the head and neck with integument removed 

 to show the superficial muscles. The right half of the mylo-hyoideus 

 muscle is also removed exposing the underlying muscles. 



sln/iy 



omo-hy. 



omo-hy prf. 



kiT-md . 



Fig. G. — Right lateral aspect of the liead with the mm. mylo-hyoideus and 

 .sphincter colli removed; digastric muscle (rfep. md.) is cut at its insertion 

 and tiu-ned up. 



M. cerato-mandibularis 3 (ker-md.^). This is a very small muscle 

 band, to which the above name is applied because, like the other two, 

 it extends from the mandible to the hyoid apparatus. This, however. 



