1897.] NEW YORK ACADEMY OF SCIENCES. 339 



The insertion of the clavicular portion is described as into 

 the ulnar side of the Deltoid ridge, not connected with the re- 

 mainder of the muscle, but " dipping somewhat underneath the 

 Deltoid." The sternal portion is said to have " a broad tendi- 

 nous insertion into the margin of the bicipital groove, in close 

 juxtaposition to the insertion of the first portion." No mention 

 is made of any doubling of the tendon of insertion of the 

 sternal portion, which undoubtedly did not exist in the species 

 examined. The authors find that in L.catta the abdominal por- 

 tion of the muscle has " an aponeurotic insertion beneath and in 

 close union with the insertion of the second (sternal) ])ortion," 

 the union of this division with the tendon of the Entopectoral 

 apparentl}' not having occurred in the species described. 



The same authors (1, p. 26) find the general arrangement of 

 the Ectopectoral in Lemui- varius very nearly the same as in L, 

 catta, differing, however, in having no clavicular portion. 



Cuvier (11, PL LXVIII.) delineates the Pectoral muscles of L. 

 varius, indicating a distinct clavicular portion and representing 

 the union, at the insertion, of a cutaneous muscular slip with the 

 second or sternal portion of the muscle (cf. infra, axillary arch). 



According to Murie and Mivart (1, p. 26, PI. II., III., lY., 

 figs. 3, 5, 1.3 and 14, P. ma.) the Ectopectoral in Galago crassi- 

 caudatus and G. allenii does not present the separation of the 

 origin into the three portions, the clavicular and posterior 

 (caudal) origins being reduced. 



They find, however, that the general arrangement of the in- 

 sertion in Galago agrees with that described for L. catta. 



Kingma (7, p. 21) describes the Ectopectoral of Galago 

 pell as consisting of two layers, one being derived from the 

 clavicle, the other from the sterno-costal articulation, both in- 

 serted into the great tuberosit}' of the humerus. 



Cuvier (H, PL LXVII., fig. 2, j and /) shows the third or 

 abdominal part of the muscle in Loris gracilis as being relatively 

 larger than in Lemur catta, and as extending up beneath the 

 superficial portion to a higher point. The Ectopectoral does 

 not appear to have a clavicular origin in this form. Nycticebus 

 also lacks the clavicular portion. 



Yan Campen (3, p. 27, PL II., fig. 10, 1.) describes the Ecto- 

 pectoral in Perodicticus (Potto) as composed of two bundles, 

 and Burmeister (6, p. 50, tab. 4, figs. 2, 17 and 15) says that in 

 Tarsius the muscle presents only two portions ; one, the smaller, 

 arising from the clavicle and sternum ; the other larger portion 

 from the sternum and cartilages of the ribs to the ninth. The 

 insertions of the two portions are said to be much as in the Le- 

 murs. 



