09 



285. A broad inUrneural spine, with a lung dcrmoncural spine, of a large Chatodont 



fish. HiinfcriaH. 



286. A large interncural spine, singularly expanded and excavated, decreasing in size 

 to its articular end, to which a short dcrmoncural spine is articulated by the 

 usual bony link. MM*. Lewria*. 



287. A long interncural spine, supporting a still longer dermoneural spine, linked 



together in the usual way. A short tubular process extends upwards from 

 the base of the interncural spine, behind the articulation. llunierian. 



288. Two interueural spines, each supporting two dermoneural spines, by the usual 



linked articulation. Huntrria*. 



280. A similar but smaller specimen of an intcrneural spine supporting two dermo- 

 neural spines, from a Ckattodont fish of the South Seas. 



290. A similar specimen longitudinally bisected, showing the thin compact walls, 



including the coarse cancellous texture, of the proper intcrneural spine : the 

 expanded portion consists of an outer compact and an inner cancellous struc- 

 ture surrounding the compact walls of the spine, the expanded mass resem- 

 bling an exostosis produced by thickening of the periosteum of the proj>er 

 spine. Presented by Prof. Own, F.R.S. 



291. A very long intcrneural spine, with two dermoneural spines united to its 

 expanded summit by the linked mode of articulation, of a Cheetodont fish. 

 'Die first of these spines is very short, and fits into a depression at the fore- 

 part of the base of the longer spine. It probably serves, by the action of 

 muscles, to keep that spine erect, as in the Balintes. lluntvrian. 



292. Tin- right coracoid with the radius and ulna of an unknown Chettodont fish. 



The lower part of the coracoid is characterized by an oblong trihedral mass of 

 bone filling its posterior concavity. llutteria*. 



