490 DR. SHUFELDT ON GEOCOCCYX CALIFORNIANUS. [NoV. 16, 



Subfamily Centropodin^. (Ground-Cuckoos.) 

 Genus Geococcyx. 

 Species : G. californianus. 



Subfamily Cuculin^. (True Cuckoos.) 

 Genus Cocgyzus. 

 Species : C. minor. 



C. americanus. 



C. erythrophthalmus. 



It is hardly necessary to add, from what we know of the osteology 

 of these subfamilies, that this classification will be strongly supported 

 by a comparison of that part of the anatomy of the several forms. 



EXPLANATION OF THE PLATES. 



Plate XLII. 



Fig. 1. Pterylosis of Geococcyx californianus, ventral aspect. 

 2. „ ,, ,, dorsal aspect. 



Plate XLIII. 



Fig. 1. Tongue, upper larj'nx, and entrance to cesophagus of Geococci/x cali- 

 fornianus, seen from above. (Life-size, and drawn by the author 

 from the specimen.) 



2. Mode of insertion of patagial muscles. 



3. Lower larj'nx, dorsal aspect. 



4. Lower larjTix, ventral aspect. 



Plate XLIV. 

 Lettering of this and following Plate. 



gl.pr, gluteus primus ; gl.m, gluteus medius ; gl.min, gluteus minimus ; St, 

 semitendinosus ; a.s.t, accessory semiteudinosus ; Cr, crurseus; V.E, 

 vastus externus ; v.i, vastus internus ; Bi, biceps flexor cruris ; I, ten- 

 dinous loop of biceps ; amb, ambiens ; Sm, semimembranosus ; S, sar- 

 torius ; a.l, adductor longus; a.m, adductor magnus; /.<?, femoro- 

 caudal ; a.f.c, accessory femoro-caudal ; o.c, obturator externus ; o.i, 

 obturator internus ; ge, gemellus ; p.l, peroneus longus ; tib.ant, tibialis 

 anticus ; tih.post, tibialis posticus ; g, gastrocnemius ; so, soleus ; popl, 

 popliteus ; e.l.d, extensor longus digitorum ; fp-^, flexor perforatus indicia 

 secundus pedis ; fp^, flexor perforatus medius secundus pedis ; /j, flexor 

 perforatus indicis primus pedis ; f^, flexor perforatus medius primus 

 pedis ; f.l.h, flexor longus hallucis ; f.h.h, flexor brevis liallueis ; fp.a, 

 flexor perforatus annularis primus pedis ; f-f.f, flexor perforans digitorum 

 profundus ; Eh, extensor brevis annularis ; e.h.d, extensor brevis 

 digitorum. 

 Fig. 1. The outer aspect of the right pelvic limb of Geococcyx californiantis ; 

 the integuments have been removed, and the drawing is designed 

 to show the superficial muscles of the part. Life size, by the author 

 from his own dissections. 

 2. Outer view of the right pelvic limb of Geococcyx californianus, the 

 superficial muscles removed and the next layer being exposed. 

 Life size, by the author from his own dissections. The limb is drawn 

 in a different position from what it is in fig. 1, which will account 

 for the shortening of some of the muscles and their change of 

 form. 



