OCR Text |
Show 362 PROF. A. H. GARROD ON THE [Apr. 1, the first semirings articulate by their equally lengthy extensions inwards beyond the short articular processes for tbe second semirings. The posterior articulations of the incomplete last tracheal ring with the first semiring, and of that with the second on each side, are considerable, and much the same in detail as in Caccabis. The pessulus blends with the penultimate ring behind. The lateral intervals between the penultimate and last rings are plano-convex, the plane side being uppermost; those between the last ring and the first bronchial semirings are meniscoid, very deep, and concave upwards. Between the first and second semiring the interval is small, elongate, and curved like the one above it. Fig. 9. Fig. 10. Front view. Back view. Coturnix communis. Ptilopachys ventralis differs very little from Coturnix in this part of its windpipe. Rollulus coronatus closely resembles the Oxtyxes and Quails. There are five fairly deep antero-lateral interannular intervals between the lowermost six tracheal rings, these same rings meeting in the middle line in front as well as through all the posterior moiety of the circumference. Ossification extends through the median fused anterior portions of the penultimate and last tracheal rings, as well |