4o6 TJie Americafi Naturalist. LMay, 
As in other cases, the Cayuga relics cannot all be classified, 
and some are found which are sufficiently puzzling. Among 
these are some of the ruder implements. These may be passed 
over now, but the foregoing account will show what may 
sometimes be done in a short time in a field supposed to have 
been exhausted. 
DAYS AND NIGHTS BY THE SEA.' 
pOR one who has spent his life inland, a visit to the sea and 
^ especially to the tropical sea is an event to date from. 
The revelation of a new world awaits him. Strange forms 
innumerable meet him at every turn, and he soon comes to 
realize that the sea is the great home of life. 
The simple outfit of thirty years ago is utterly inadequate 
for the student of nature of to-day who hopes to add anything 
of importance to our knowledge of the organic world. He 
needs not only good microscopes, drawing materials, ample 
aquaria and dredging apparatus, but a large assortment of 
chemical reagents, the uses of which in the preservation and 
study of living matter has almost revolutionized the science of 
biology. 
Nearly all marine animals discharge their eggs into the 
water in vast numbers, and the young which are hatched from 
them, in most cases, lead an independent swimming life at the 
surface of the ocean. This locomotor larval period as it is 
called, may extend over weeks or months, and is shared by 
animals which in the adult state have the most diverse habits, 
such as the coral, the barnacle, and the mussel, which are 
firmly anchored to some solid support, the starfish and sea- 
urchin, the jellyfish and annelid, the crabs and prawns, the 
salpas and amphioxus ; and also the fishes, the highest type of 
marine life which pass their early stages at the surface of the 
' Part of a lecture delivered in the " University Lecture Concert Course," Jan. 
31, 1889. Western Reserve University, Cleveland, Ohio. 
