C. A. McMalion — Gneissose- Granite of the Himalayas. 345 



Coccocrimis in the calyx-struotnre, further differs from Hapalocrinus 

 in its heavy, biserial arms. Cordylocriniis is very closely allied to 

 Hapalocrinus, but differs in the compound nature of the IIBr, each 

 of virhich bears two pinnules. Marsiipiocrinus has but one IBr, 

 biserial arms, and a large five-lobed axial canal in the stem. Platy- 

 crinus and Eucladocrimis have but one IBr, biserial arms, and stem 

 of elliptic section. 



In its arm-structure, then, Hapalocrinus is more primitive than 

 any of the Platycrinidge, except perhaps Coccocrimis, of w^hich the 

 arms are unknown ; in its tegrainal development it seems to be 

 about on the same level as Coccocrimis, though perhaps a little 

 fui'ther removed from the Larviform type. This stage of evolution 

 consists with its geological range, which is from Middle Silurian to 

 Lower Devonian. 



Eeference of the Melbourne Crinoid to Hapalocrinus. 



In its arm-structure, and, obscure though it be, in the composition 

 of the tegmen, the Melbourne crinoid appears more closely allied 

 to Hapalocrinus than to any other genus with which I ain acquainted. 

 It has, however, three IBr, whereas no other Platycrinid has 

 more than two. Therefore, if it be placed with Hapalocrinus, we 

 must regard it as in this respect more primitive than the other 

 species. It is also at least as primitive as any other Hapalocrinus 

 in the structure of the IIBr and pinnules. It would be unwise to 

 found a new genus for the reception of this unique and rather 

 obscure specimen, so I refer it provisionally to Hapalocrinus. 



As there can be no question that it represents a distinct species, 

 it requires a trivial name. I received the specimen and studied it 

 during the week of Her Majesty's Diamond Jubilee ; this fact, and 

 the fact that it is the first Silurian crinoid crown found in the colony 

 of Victoria, inevitably suggest the name — 



Hapalocrinus VictoricB. 



Diagnosis. — IBr 3 ; arms fork once ; IIBr half as long again as 

 wide, in zigzag, bearing alternately disposed delicate pinnules. 



The type-specimen will be placed in the museum at Melbourne 

 University by Mr. T. S. Hall, to whom, in conclusion, I express 

 hearty thanks for giving me the opportunity of studying this highly 

 interesting fossil. 



II. — Notes on the Age and Structure of the Gneissose-Granite 

 OF the Himalayas with reference to Mr. Middlemiss's 

 Memoir on the Geology of Hazara. 



By Lieut. -General C. A. McMahon, V.P.G.S. 



PART II. 



Origin of tlie Foliation. 



IN the first part of this paper I confined myself to the consideration 

 of the age of the Himalayan granite ; in this I propose to 

 discuss Mr. Middlemiss's views regarding the cause of its foliation. 



Mr. Middlemiss appears to be so satisfied in his own mind that 

 the foliation has been produced subsequent to the consolidation 



