SPP eS ee RE SY Broa ee aan Geer ee tee a ee ee ee 
H. M. Bannister—Age of the Laramie Group. 243, 
_ the thin web and the colors being uninjured. With it was th 
_ terminal portion of an arm of a gigantic squid (Arechiteuthis), 
d 
too much injured for specific determination. 
the species in honor of Capt. Collins, to whom and the crew of 
his vessel, we are indebted for so many interesting and novel 
_ specimens. 
Taonius hyperboreus Steenst. (2) 
A large and handsome species of this genus has just been re- 
ceived, which may be this species, though in its proportions 
differing from Stéenstrup’s measurements. The eyes are very 
large and globular, in contact, beneath the head. ‘The arms are 
very short, and part of them have lost their tips and afterwards 
healed. The tail is long, lanceolate, tapering to a very long, 
_ slender, acute tip. Color brownish red, with rather large 
rounded, dark brown spots. Length of head and body, 135 
~ inches ; edge of mantle to tip of tail, 12; tail, 5; its breadth, 
‘8; diameter of body, 225; of eye, 1; length of ventral 
arms, 1:9; of lower lateral arms, 2°25. 
Taken at the surface, in the northern edge of the Gulf 
Stream, W. long. 55°, by Mr. Thomas Lee, schooner “ Wm. H. 
Oaks,” Jan., 1879. 
: ArT. XXX.—WNote on the Age of the er Group or Rocky 
Mountain Lignitic Formation ; by H. M. BANNISTER. 
In his recently issued report on Systematic Geology, vol. i, 
_ U.S. Geological Exploration of the 40th Parallel, Mr. Clarence 
King discusses at length the disputed question of the age of the 
Roeky Mountain lignite series, to which, by agreement with 
Dr. Hayden, he gives the name of the Laramie group. In his 
argument for the exclusively Cretaceous age of these beds, it 
appears to me that he has generalized too freely, and I propose 
to notice a few omissions and points where he seems to me to 
be in error. 
