OF NEW SOUTH WALES. 315 



The only other specimen known is that from which the 

 present description is taken. It is stuflPed, and in the Australian 

 Museum, caught, I believe, in Rose Bay, Port Jackson, and pre- 

 sented by E. S. Hill, Esq., of WooUahra. I have, also, in my 

 Museum, the jaws and teeth of a specimen which was caught in 

 Broken Bay two years ago, and unfortunately not preserved. 

 But I think it not at all improbable that the species may not 

 after all be of such very rare occurrence. The general resem- 

 blance to H. PTiillipi is considerable, and fishermen are generally 

 far from being acute observers of fish which are not of a market- 

 able character. 



Heterodontus Feancisci. 



Gestracion Francisci. Girard, Proc. Ac. Nat. Sc. Philad., 1854-7, 

 p. 196; and V.S. Pac. R.R. Exp. Fish, p. 365; Gunth. Cat. 

 Brit. Mus., vol. 8, p. 416. 



Gyrnpleurodus Francisci. Gill. Proc. Ac. Nat. Sc. Philad, 1862, 

 p. 490. 



Heterodontus Francisi. Dum. Ichthyol. tome 1, p. 426. 



I have one specimen of this very distinct species, an adult 

 male, 2 feet 6 inches long, from the Bay of Monterey, California. 

 It is represented in plate 26, and is, I believe, now figured for 

 the first time. It is a spirit specimen, and the markings, if any, 

 cannot, of course, be represented ; but in other respects, the 

 figures may be trusted, as the specimen is in a good state of 

 preservation and not contorted in any way. I regret that the 

 dentition cannot be shown in the same way as in the other two 

 species, as to do that would be to spoil the specimen. 



The chief points in which it differs from H. PhilUpi are as 

 follow : — The head is proportionally broader and less high ; the 

 profile less steep and more convex ; the supra-orbital ridges less 

 prominent, almost continued to the snout and terminating 

 abruptly behind the eyes ; the teeth in front strongly tricuspid — 

 the middle cusp large and pointed, those on the sides longitu- 

 dinally ridged, but not as in H. galeatus ; in fact, the lateral 

 teeth in this species seem to be intermediate between those of 

 H. PhilUpi and galeatus. The spiracle larger and farther from 

 and more behind the eye ; the first gill opening scarcely twice 



