18 



MR. E. J. SIDEBOTHAM ON THE 



[Jan. 20, 



Abductor indicis, from outer side of base of metatarsal of great 

 toe to inner side of first phalanx of index. 



Abductor poHicis.- — Large, arising from tuberosity of scaphoid ; 

 inserted into inner side of first phalanx of poUex. 



Intermediate layer. — Each consists of two bellies, which are more 

 or less connected and inserted into bases of first phalanges. 



Fig. 5. 



^ 



B 



-O.T 



Myology of Water-Opossum. 



6^. Jtfe., gluteus medius ; G^.ilfi., gluteus minimus ; ff.Q., gluteus quartus; Q.E., 

 quadriceps extensor ; Sc, subcrureus ; Py., pj-riformis ; 01., obturator 

 iiiternus ; ^.i''., quadratus femoris; P. & I., psoas and iliacus; G.Ma., 

 gluteus magnus ; A.B., adductor brevis ; P., jJectineus ; V.E., -vastus 

 externus ; F./., vastus internus ; ^.i., adductor longus ; ^.iV/., adductor 

 magnus; G.I., gastrocnemius internus; G.E., gasti-ocnemius externus; 

 P.QLD., peroneus quinti digiti ; Po}}., popliteus. 



Flexor brevis minimi digiti. — Large, arising from base of meta- 

 carpal of minimus. 



Flexor brevis annularis, — Arises from ridge on cuboid by a narrow 

 tendon. 



Flexor medii. — Inner part is connected with flexor indicis. 



Fexor indicis. — Arises from cuneiform bones. 



Flexor pollicis. — Arises from scaphoid. 



Plantar Layer. — All arise from common tendon in sole. The 

 muscles to pollex and minimus are large, the others being very 

 small slips. The slips to pollex and index pass to outer side of 

 phalanges. The slip to the minimus passes to the inner side ; whilst 

 the annularis has two slips — one passing to the inner side, and tlie 

 other dividing, the greater part passing to outer side, whilst a small 

 portion goes to inner side. There is also a flexor brevis digitorum 

 which arises from os calcis. 



