266 Bashford Dean Memorial Volume 



muy marcada, es de color pardo oscuro, algo mas claro por debajo." This we translate 

 thus: "The strongly marked lateral line is of a dark-brown color, but it is lighter below." 

 The lateral line 15 strongly marked as may be seen in our Figure 5, plate II, a reproduction 

 of his figure made from a photograph by the well-known ichthyologist, Gandolfi-Horn- 

 yold. But what we believe Bertrand means is that 'The body is of a dark-brown color 

 above the strongly marked lateral line, but is lighter in color below/ Speaking generally 

 for Spanish and Portuguese specimens, Lozano Rey (1928) says ''The general color is a 

 uniform brown, darker on the edges of the fins, and somewhat lighter on the ventral 

 surface of the body." 



As our Table VI shows, there are in the American Museum three adult speci- 

 mens, presumably brought or procured from Japan by Dean prior to 1906. These, after 

 at least twenty-five and probably thirty years in alcohol and formalin, are somewhat 

 diverse in coloration. The largest fish (1550 mm.), which has been in a copper tank, 

 has teeth and skin colored green from impregnation with copper salts. Above the lateral 

 line its color is dark-brown tinged with green, below this a greenish brown-gray. The two 

 other fish have been stored in wooden barrels and hence lack the greenish tinge. The 

 second (1485 mm. long), in a poor state of preservation, is everywhere a dark muddy-brown, 

 darker (approaching black) below. Our smallest fish (1350 mm. over all) is in a better 

 state of preservation. It is dark-brown on the dorsum, lighter coppery-brown or tan below 

 the lateral line, and darker again on the belly. 



The head from Columbia University, which has been beautifully preserved in 

 formalin, is a light coppery-brown approaching tan. Still lighter brown or tan over the 

 body are our six embryos after twenty-five or thirty years of preservation. Their fins are 

 darker and therein they agree with the fin-coloration of our adults. 



THE HEAD OF CHLAMTDOSELACHUS 

 The head of the Japanese frilled shark, in keeping with the unusual form of the body, 

 differs in many respects from that of any other shark known to us. 



GENERAL FORM 



In our large embryos the head is rather blunt, but in our three full-grown adults it is 

 somewhat pointed and is remarkably flat on top and wide behind. Indeed it is flatter 

 and wider than in any other shark known to us. In both young and old it is widest behind 

 in the region of the first gill-opening, as shown in the small figures reproduced from Carman 

 in our Text-figure 1. A better showing of the dorsal aspect of the head is found in our 

 Text-figures 7 from Carman (1885.2), and 21 from Allis (1923). 



From these, and from the figures of the whole shark previously given, it can be 

 seen that Carman has grounds for saying of the head of Chlamydoselachus that it "has 

 a look about it that reminds one of some of the venomous snakes." This, it may be noted, 

 has been remarked by every visitor who has seen our specimens. It is particularly true 

 when the mouth is wide open, for then the teeth stand out and the hinder part of the 

 head spreads widely. 



