894 MR. F. E. BEDBARD ON THE [NoV. 26, 



side parallel to, and in contact with, the bony style of the sternum. 

 Anteriorly dipi^ing under the expanded anterior end of the 

 sternum and joining the rest of the sternohyoideus, as in Mega- 

 lophrys nasuta, it is covered \>y an aj)oneui'osis inserted upon 

 the latero-posterior border of the expanded anterior end of the 

 sternum. This here joins the sternal attachment of a portion of 

 the rectus muscle, which muscle I have also referred to as occur- 

 ring in Megaloplirys. The attachment of this latter muscle is 

 strongly tendinous in Xenophrys as it is in Megaloplirys. The 

 tendon of this muscle, though attached to the rhomboidal expan- 

 sion of the sternum anterioi'ly by a stout tendon, is continued on 

 by this tendon to the posterior border of the cartilaginous and 

 expanded coracoid "*. 1 have on a redissection of Megalophrys 

 nasuta ascertained that this is also the case with that Frog. The 

 portio omo-abdominalis of Rana, which is also plainly to be seen 

 in Xenop>hrys, and Avith the same general relations that it has 

 in Baoia, is not to be confused with the present muscle, which. 

 is, as I think, to be regarded as a specialised tract of the rectus 

 abdominis, not represented (at any rate as a specialised muscle) 

 in Mana. The corresponding muscles in Leptobrachiu'jn hasseltii 

 seem to show no differences from those of Xenophrys ononticola, 

 and there is thus in this region of the musculature an agreement 

 among these Eastern Pelobatidse. 



I have been able to compare these several muscles which 

 agree so exactly among the Oriental Pelobatida? with those of Pelo- 

 hatesfuscus. I find that this species of Pelobatid agrees with its 

 Eastern relatives and thus disagrees with Rana. Pelohates agrees 

 more closely with Megaloplirys nasuta than with Xenophrys 

 tnonticola in that the sternal portion of the sternohyoid is not 

 inserted at all anteriorly upon the rhomboidal expansion of the 

 sternum. It can be plainly seen to dip under this {i. e., to pass 

 above it dorsally), and appears to be quite unconnected with 

 it by any fibres at all, and there is no conspicvious aponeurosis. 

 The coracoidal insertion of the rectus is therefore much clearer 

 than in Xenophrys, where its relations to the anterior end of 

 the sternum are rather confused by the sternal insertion of the 

 sternohyoideias. The tendon can be seen to pass through a 

 tendinous sling, which runs from the external corner of the 

 anterior end of the sternum to the surface of the rectus muscle 

 just above it, to the posterior border of the coracoid. This is, as 

 I have convinced myself, the actvial arrangement in Xenophrys 

 and Megalophrys as well as in Pelohates. 



In describing the geniohyoideus muscle of Rana esculenta, 

 Dr. Haslam translates t as follows from Ecker's work upon the 

 Frog : — This muscle on each side of the throat " divides poste- 

 riorly into two portions. One of these, the median, is inserted into 



* The principal attacliment of the tendon is really to the coracoid. The attach- 

 ment to the sternum is rather of a fibrous than a tendinous nature, as in Felohatea. 



t 'The Anatomy of the Prog,' by Dr. Alexander Ecker. Transl. by George 

 Haslam, M.D., Oxford, 1889, p. 64. 



