490 DR. SHUFELDT ON GEOCOCCYX CALIFORNIANUS. [Nov. 16, 
Subfamily Centropopinz. (Ground-Cuckoos.) 
Genus Grococcyx. 
Species: G. californianus. 
Subfamily Cucutinaz. (True Cuckoos.) 
Genus Coccyzus. 
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. 
Puatre XLII. 
Fig. 1. Pterylosis of Geococcyx californianus, ventral aspect. 
2. » : a dorsal aspect. 
Prats XLII. 
Fig. 1. Tongue, upper larynx, and entrance to esophagus of Geococcyx cali- 
fornianus, seen from above. (Life-size, and drawn by the author 
from the specimen.) 
2. Mode of insertion of patagial muscles. 
3. Lower larynx, dorsal aspect. 
4. Lower larynx, ventral aspect. 
Prats XLIV. 
Lettering of this and following Plate. 
glpr, gluteus primus; gl.m, gluteus medius; g/min, gluteus minimus; St, 
semitendinosus; a.s.t, accessory semitendinosus; Cr, crureus; V.£, 
vastus externus; v.2, vastus internus; 2, biceps flexor cruris; /, ten- 
dinous loop of biceps; amb, ambiens; Sm, semimembranosus; S, sar- 
torius; @./, adductor longus; a.m, adductor magnus; fic, femoro- 
caudal; afc, accessory femoro-caudal; o0.c, obturator externus; 0.i, 
obturator internus ; ge, gemellus; p./, peroneus longus; 7id.anz, tibialis 
anticus ; 7¢zb.post, tibialis posticus; g, gastrocnemius; so, soleus; popl, 
popliteus ; ¢./.d, extensor longus digitorum ; fp,, flexor perforatus indicis 
secundus pedis; f-po, flexor perforatus medius secundus pedis; f,, flexor 
perforatus indicis primus pedis; f,, flexor perforatus medius primus 
pedis ; /.2.A, flexor longus hallucis; (0.2, flexor brevis hallucis; f:p.a, 
flexor perforatus annularis primus pedis ; f-p.p, flexor perforans digitorum 
profundus; #0, extensor brevis annularis; e¢.b.d, extensor brevis 
digitorum. 
Fig. 1. The outer aspect of the right pelvic limb of Geococcyx californianus ; 
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 Geococeyx 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 
a the shortening of some of the muscles and their change of 
orm, 
