26 PROCEEDINGS OF THE NATIONAL. MUSEUM tol. 7ft 



the hyoglossus and genioglossus are figured as being inseparable, 

 but in the text concerning the former the two muscles are described 

 separately. At any rate, in these two genera the attachment is to 

 the mandible, the raphe, and the hyoid. 



There is a palatoglossus^ with origin from the bony palate and 

 insertion into the base of the tongue, as described for BaJaenoptera 

 but not for Kogia, and this muscle is not figured for Glohiocephala. 

 There are also transverse fibers of a lingualis, such as described for 

 Balaenoptera. 



MUSCLES OF THE NECK 



Superficial and hyoideal groups. — The sternomastoideus is power- 

 ful, with origin from the cranio-lateral angle of the sternum and 

 insertion upon the membrane over the lateral border of the exoccip- 

 ital. This muscle is much more robust than in Kogia or Balaenoptera., 

 but the sternomastoid of Gldbiocephala evidently approaches it in 

 size. 



The mastohuineralis is a thin muscle arising from the membrane 

 over the border of the exoccipital, caudo-dorsad of the attachment of 

 the sternomastoid. Insertion is upon the cranial portion of the 

 medial tuberosity of the humerus. This muscle is evidently homol- 

 ogous with the usual mammalian cleidomastoid. Schulte thinks that 

 in Balaenoptera it contains elements of both the cleidomastoid 

 and the trapezius. In the latter genus Carte and McAllister found 

 that origin was also from the transverse processes of some of the 

 cervical vertebrae, but Schulte did not. The muscle is evidently 

 present in Glodiocephala., Murie referring to it as the cephalo- 

 humeral. 



No omohyoid was observed in the present animal, and there is none 

 in Kogia^ Phocaena., nor apparently in Glohiocephala^ but Schulte 

 found it present in Balaenoptera. 



The immense sternothyroideus has origin from the sternum, extend- 

 ing from the cranial notch to the cranio-lateral angle, and it is 

 inserted along practically the entire length of the basihyal. It is 

 thus an exceedingly powerful muscle, especially craniad. Its large 

 size is evidently characteristic of whales, for it is essentially similar in 

 all cetaceans so far investigated. 



The sternothyroideus is very slender and weak. It does not 

 approach the medial line but has origin from the latero-cranial 

 process of the sternum, and is inserted upon the lateral portion of 

 the thyroid cartilage. This muscle is apparently similar in Kogia, 

 Balaenoptera, and Phocaena, although in the first mentioned genus 

 Schulte states that origin is also from the cartilage of the first rib. 

 The illustration for Glohiocephala shows this muscle as enormous, 

 to such an extent that I suspect there may have been an error made 



