96 General Notes. [Jan. 
1. Hologeny. From the fertilized egg but one individual takes 
its rise, with or without metamorphosis. Hypogenesis (Haeckel). 
2. Mero ogeny. From the fertilized egg two or more indi- 
viduals are developed, whic 
A. Revert aiee to =x form and manner of reproduction of 
the parent. Tem 
B. Develop jais sadividoals which become different, or a 
series of generations, varying in their mode of development 
(alternation of genera rations, metagenesis). 
a. Calycogenesis (Salpa, Medusz). 
somewhat caer conclusion that the mother may become 
the grandmother of her own child, in virtue of the segmentation 
of the ovule into a number of distinct germs, which lead to the 
development of as many distinct individuals of the same sex. 
The same thing apparently occurs when in the human subject 
twins are invested by a common chorion. The subject, however, 
needs further investigation, especially since the researches of 
Dareste, Fol, Klein nenberg, and especially of Rauber, have so 
greatly extended the views of Lereboullet in respect to the mode 
of origin of double monsters among vertebrates or pleuro- 
gastric types. That the production of double monsters occurs 
among hypogastric types in essentially the same way as in the 
vertebrates seems to be pretty conclusively established by Mr. 
Ryder’s observations upon double monstrosities among lobster 
embryos. 
ANTHROPOLOGY. 
Chinese e in America.—In the “ Proceedings of the Amer- 
ican Antiquarian Society,” vol. iv. p. 62, Mr. Frederick W. Put- 
nam makes a report of jade objects which have a double interest, 
Twelve specimens are reported from Nicaragua and Costa Rica, 
ten of which were ornaments made by cutting celts into halves, 
quarters, or thirds, a portion of the cutting edge of the celt re- 
es on each piece. The method of sawing the objects is 
indicated. The first query, therefore, is, For what reason should 
a celt of such hard material be cut up and perforated? Let us 
suppose that the original blade belonged to the outfit or accou- 
` trement of a celebrated warrior, hunter, or artist. The pieces of 
that blade would become powerful medicine or influential fetishes 
and highly prized. 
— Greater Sron is excited when we read the report of 
_Mr. O. W. Huntington upon the nature and source of the ma- 
terial in these ornaments. It is as follows: “The eia 
