The appendicular muscles of Necturus maculosus. 389 



the outer (lateral) surface of the cartilaginous proximal epiphysis 

 of the numerus. 



M. omoliyoideus (oh). With some hesitancy this name may 

 be given to a narrow slip which extends oblique] y from the region 

 back of t the external gills to the notcli between the scapula and the 

 procoracoid, crossing in its course the dorsolaryngeus, and adjacent 

 at its insertion to that of the trapezius, with which it there becomes 

 parallel. It arises from the third epibranchial, or from the connective 

 tissue in its vicinity, and extends obliquely from an antero-dorsal to 

 a postero-ventral position. It inserts into the anterior margin of 

 the shoulder-girdle in the deep notcli between the scapula and pro- 

 coracoid, adjacent to the insertion of the trapezius. 



M. trapezius (t). This muscle is a thin sheet, which tapers 

 down from a broad origin to a narrow band, and continues thus in 

 the direction of the most posterior fibers. Like the latissimus dorsi 

 its fibers arise from a transparent aponeurosis, which is closely 

 applied to the ander side of the skin, so that the fibers appear to 

 rise directly from this latter surface. The origin is in great part 

 covered by the Mm. levatores arcuum and dorsolaryngeus, which 

 need to be dissected free and turned down in order to expose it. 

 Unlike the corresponding muscle of the higher Urodeles, no fibers 

 arise from any portion of the head, but the entire origin, in the 

 relationship above described, extends between the second and fourth 

 myocommata. and Covers laterally the dorsal trunk muscles. The 

 trapezius is inserted into the anterior margin of the osseous scapula 

 along nearly its entire length. 



M. 1 e v a t o r a n g u 1 i scapulae (Is). This is a very narrow 

 band of muscle, which extends horizontally from the skull to the 

 suprascapula, and lies mainly in the interval between the dorsal 

 mass of trunk muscles and the visceral System, but belongs with the 

 former. It arises by an extremely fine tendon from the posterior 

 edge of the exoccipital bone, lateral to the condyle, the tendon being 

 somewhat expanded at its origin. This tendon extends for a distance 

 about equal to the width of a myotome, where it becomes continued 

 as a narrow fleshy slip, which runs posteriorly in the interval between 

 the dorsal trunk muscles and the branchial arches; after emerging 

 from which it is still covered by Mm. levatores arcuum. dorso- 

 laryngeus, and trapezius. The insertion takes place by means of 

 fieshy fibers into the anterior angle of the suprascapula, just within 

 the margin and thus upon the medial (inner) surface, and closely 



