904 | General Notes. [ October, 
One of the most startling of Dr. Paul Albrecht’s homologies 
or rather homo-dynamies is that which he seeks to trace between 
the claspers of a ray and the penis or clitoris of a mammal, bird, © 
etc. It is, he says, the two hemipenes or claspers -united, and 
cases of epi and hypo-spadias are atavisms. The skeleton, mus- 
cles and nerves of this organ, according to Albrecht, belong to 
the extremities. Dr. C. Hartlaub has (Zoclogischen Jahr- 
bichern, Band 1) given the results of an investigation of the speci- 
mens of manatees in various European myseums. He fully 
establishes the specific difference between the African M. sene- 
galensis and the American M. latirostris, and describes for the 
first time the skull of the South American M. inunguis, a species 
-absolutely ignored by most naturalists, but the distinctness of — 
which he proves. The African manatee inhabits the west coast 
of Africa from the Senegal to the Quanza, and penetrates far into 
‘the interior up the larger rivers. The “water sheep” spoken of 
by Schweinfurth in the Welle, and the supposed manatee found 
in Lake Tchad and the Shari by Barth and others, may prove to 
be another species. In America the exact boundaries between 
| THE DREAMS OF THE BLIND.—A paper read before the biolog!- 
eal section of the American Association for the Advancement 0 
_ Science was on “ The Dreams of the Blind,” by Dr. Joseph Jas- 
< trow. The object of the paper was to determine the extreme a, 
-. at which a child may become blind and yet lose all memory ° 
-~ the visible world, so that it no longer sees in its dreams. P 
-~ Almost all dreams of normal persons are sight-dreams, an $ 
dream is often spoken of as a vision. The blind are depri aer A 
er. 
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