ART. 13 ANATOMY OF CHINESE FINLESS POEPOISE — HOWELL 7 



per cent in the adult female. The notch between the flukes of the 

 former is deep and narrow, the sides in fact overlapping ; but in the 

 adult the notch is much broader and relatively not so deep. 



Genitalia. — In lateral profile the position of the vulva is indicated 

 by a slight though definite prominence, and the position of the anus 

 by another that is barely apparent. There is a pair of labia, which 

 are hardened in the preserved specimens, and not approximated. 

 Between them lies the vulva, the external features of which are of 

 generous size, but there is no clitoris to be seen. Caudad is situated 

 the much smaller anal opening. 



Mammae. — Upon either side and barely caudad of the vulval 

 orifice, as indicated in Figure 1, is a mammary silt, barely raised 

 above the surrounding surface. The borders are lightly marked by 

 depressions. 



OSTEOLOGY 



Allan's descriptions and comparisons of the skeleton of Neomeris 

 with that of Phocaena are adequate, and a repetition of the informa- 

 tion w^iich he presents is hardly desirable; but supplementary and 

 additional details are herewith offered. 



As is to be expected, the skulls exhibit endless variation of a some- 

 what minor nature, especially in the development of the intermaxil- 

 lary prominences, the region about the external nares, and the ros- 

 trum. Caudad, the middorsal sulcus of the rostra of two specimens, 

 is slightly curved, the convex portion facing to the right in 240001 

 and to the left in 240003. The right side of the skull, from the 

 dorsal aspect, is invariably a trifle larger than the left, as shown by 

 the accompanying measurements. These are taken transversely from 

 the dorso-caudal termination of the mesethmoid to the lateral border 

 of the maxilla of either side. In the cleaned skulls the two narial 

 apertures are practically the same size. As mentioned in the dis- 

 cussion of the blowhole, there is a fossa, filled by a corresponding 

 dilation of the adjoining spiracle, upon the medial portion of the 

 maxilla immediately latero-caudad of the narial opening, and that 

 of the right side is distinctly larger than of the left, save in 49544, in 

 which the two are similar. The vertex of this specimen exhibits the 

 least cranial projection, and as the largest fenetrations of the exoc- 

 cipitals (save in the immature female dissected and cleaned) are also 

 present in this skull, which is considerably the largest, it is likely 

 that it is a male, while the remaining skeletons are of females. 



Upon the ventral aspect of the skull there is variation in the con- 

 formation of the border of the palate and the adjoining portion of 

 the pterygoids. There is also variation in the distance that the 



