PROFESSOE PLOWEE ON EISSO'S DOLPHIN. 3 



of which were worn quite flat. The hinder edge of the most posterior of these was 

 2 J inches from the anterior edge of the chin ; and the three occupied a space of 17 inch. 

 The middle one was slightly larger than the others, the truncated crown being 0-3 of an 

 inch in diameter, and projecting 0'2 of an inch above the level of the gum. The space 

 between the right and left anterior tooth was 1'2 inch. 



On the under surface of the body there was a deep median depression containing the 

 vulva and anus, 8 inches in length, and bordered in its anterior portion by prominent 

 labia. The nipples were each placed in a slit, 1 inch long, on the side of the median 

 pudendal fissure, and 1^ inch distant from it. The mammary glands were largely 

 developed, the internal reservoir being filled with milk. This cii-cumstance, combined 

 with the dilated, vascular condition of the uterus, showed that the animal had recently 

 given birth to a young one. 



Perhaps the most noticeable external character was the very marked and peculiar 

 coloration. The most prevalent tint was grey, varying in some parts to pure white, 

 and in others to deep black ; but the light parts of the head and anterior portion of the 

 body had a yellowish wash, and the dark parts a slight bluish or purple tinge which 

 varied much in different lights. The length of time that the animal had been out 

 of the water may have modified these colours somewhat ; but the general disposition of 

 the light and dark shades, as shown in the figure, were evidently natural. 



The head and the whole of the body anterior to the dorsal fin was generally of a 

 lightish grey, variegated with patches of both darker and whiter hue. The eye was 

 surrounded by a small oval patch of black. The lips were mottled with black. There 

 was a large, nearly black, patch on the top of the head, extending backwards a short 

 distance behind the blow-hole, and on each side towards, but not reaching, the eye. 

 Both surfaces of the pectoral fin were nearly black, very finely mottled or dappled with 

 grey, and becoming darker towards the tip. The neighbourhood of the axilla was of 

 the same dappled colour. Behind the anterior edge of the dorsal fin the general colour 

 of the surface, including the dorsal and caudal fins, was nearly black, though with a 

 large light patch on the up])er part of the side directly above the pudendal orifice. 

 The middle of the belly, as far back as the pudendal orifice, was greyish white. 



But what gave the most remarkable and characteristic appearance to the animal was 

 the presence of conspicuous, but most irregular, light streaks and spots, scattered over 

 the whole of the sides from the front of the head to about two feet from the end of the 

 tail, where they ceased, at least on the lateral surfaces. These markings were naturally 

 most conspicuous in those parts of the surface where the ground-colour on which they 

 were placed was dark. The streaks or lines were of various lengths, and running in all 

 directions in a most fantastic manner, some parallel, some crossing each other, and 

 some forming sharp angles, zigzags, and scribble-like patterns. When most completely 

 developed, and not interfered with by others, each linear marking was of a compound 

 character, consisting of a very naiTow, central white line, with an irregular, black, 



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