1124 Recent Literature. 
description of the species, shows that Dr. True is guilty ofan 
inaccuracy as to the grounds on which the species was diss — 
guished: “The shorter head and fins, the peculiarly high new — 
spines and peculiarities of the cervical vertebra, would seemty — 
distinguish this [species] from the /ongimana.” 1 add that sine 
my description was written, the museum at Niagara Falls, wher — 
the specimen is preserved, has been rebuilt, and the skeleton very 
probably remounted by an inexperienced person. 
Dr. True and others are correct in the supposition that my 
Hyperobdon semiunctus is a Ziphius, as I have known for a long 
time, and had supposed I had published. The Agaphelus gibh- 
sus must be withdrawn from the list of authentic species. The 
bones which I referred to it are probably those of Balenopient 
rostrata. The characters of the animal in the flesh were given 
me by persons whom I supposed to be trustworthy, but who may 
have been mistaken. The species may, however, be the Balew 
gibbosa of the old authors. Dr. True is not always consistent m 
his nomenclature. Thus he adopts the name Phocena brachycuum, 
the first name of ‘the species which was published with a desc 
tion. The species had previously been named P. americana W 
description. The history of the name Balena cisarctica is the sane | 
It was first described under this name, though it had probiby 
already received the catalogue name B. discayensis, "o ve 
scription. Dr. True adopts the latter name. e name oak 
arctica should, by the rules of nomenclature, be allowed wee 
and is.also much the better one. It has been adopted by + ? 
can authorities, as Gill, Allen, Holder, etc.—£. D. Cope. ae 
WINcHELL’s REPORT ON THE GEOLOGY OF MINNESOTA 
more notable features of this annual report are Steng jared Ge : 
on the glacial lake, Agassiz, the area and depth of whi r 
described, its old beaches being well described and ind! A 
amap: “ When this glacial lake attained its greatest melting : 
just before it found an outlet into Hudson bay, over Ve greet 
ice-sheet, its length from south to north was probably £ tht | 
than Lake Superior; but its area was only half or tw vat the tise 
of Lake Superior because of its less average vie ia 
of the formation of its highest beach, the depth of Lake 
above the Lake of the Woods was some 200 feet; abo 
River valley, at our northern boundary, 450; an ae 
Winnipeg about 600 feet.” i 
Mr. Upham does not accept Gen. Warren s v elevation d 
drainage of this region was directed southward by an 
