. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. 290 Bashford Dean Memorial Volume on the head of Chlamydoselachus is that of AUis (1923, pp. 195-203). We reproduce his plates as our Text-figure 21 and Figure 7, plate II. It is outside the plan and purpose of this paper to discuss the details of the distribution of the whole sensory canal system on the head of our fish. They are clearly shown in our reproductions of Allis's figures and in the explanation of his lettering of his drawings, and any one seeking an exact description of them is referred to his te
. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. 290 Bashford Dean Memorial Volume on the head of Chlamydoselachus is that of AUis (1923, pp. 195-203). We reproduce his plates as our Text-figure 21 and Figure 7, plate II. It is outside the plan and purpose of this paper to discuss the details of the distribution of the whole sensory canal system on the head of our fish. They are clearly shown in our reproductions of Allis's figures and in the explanation of his lettering of his drawings, and any one seeking an exact description of them is referred to his text. Intimately associated with the lateral line system on the head of Chlamydoselachus are the pores of the ampullae of Lorenzini and of the pit-organs. The distribution of these organs and canals is adequately portrayed by Garman (our Text-figure 20), and by Allis (our Text-figure 21 and Figure 7, plate II). THE TAIL OF THE FRILLED SHARK As we shall see later, the Japanese call Chlamydoselachus the 'â 'â h2;ard shark," probably because of its elongate slender body terminating in a long slender pointed tail. The tail of our fish includes all those structures posterior to a transverse plane cutting through the cloacal opening. The tail is compressed laterally and on its anterior portion bears the dorsal and anal fins. The hinder part of the tail bears the caudal fin, and its structure will be more conveniently described later in con- nection with that organ. However, we here give some measurements. Carman's first specimen () lacked the tip of the tail, but of his second, which was 1220 mm. (48 in.) long, he wrote (1887) that "the tail was a little more than one- fourth of the total ; In Collett's (1910-mm.) specimen, the tail from the anterior base of the anal measured 470 mm. (24 per cent), a fair agreement with Garman. However, Bragan^a's (1904) measurement was a 405-mm. tail on a 920- mm. specimen. Here the tail measures of the total length.
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Keywords: ., book, bookcentury1900, booksubjectfishes, booksubjectfishesfossil
