OPERATIONS AT THE LABORATORY. 
517 
His studies upon tbe early history of the germinal area of the squid 
are without doubt the most exhaustive yet undertaken, as he has been 
able to trace the origin of the individual cells and their relations to a 
median plane of symmetry which bisects the germinal area. This has 
been made possible by the clearness with which the phenomena of 
karyokinesis manifest themselves. Other aspects of the subject will 
also be dealt with by him, especially the phenomena of fertilization, 
the formation of polar cells, the development of the ciliated areas on 
the embryo, etc. The development of the eye will also form the sub- 
ject of special treatment at his hands. The habits of the adults during 
the breeding season have also been studied by Mr. Watase. 
The value of these studies on account of the economic importance of 
the squid as bait and as food is not to be lost sight of. ' They are an im- 
portant article of food in China, very large quantities of an allied species 
being salted, dried, and shipped to that country annually from our west 
coast. On the eastern coast they are scarcely less valuable as bait to 
the New England fishermen. 
Dr. Wm. Patten, of the Lake laboratory at Milwaukee, Wisconsin, 
spent part of June and July in the Fish Commission laboratory, collect- 
ing and studying materials for further work on the minute structure of 
the eyes of the king crab ( Limulus ) and other arthropods. He secured a 
large series of embryos for this purpose along the shores of the harbor, 
which will no doubt enable him to add essentially to the very important 
results which he has already obtained in this direction, and which have 
been published in the Mittheilungen of the zoological station at Naples 
and in the Journal of Morphology. 
Mr. W. McM. Woodworth, representing Harvard University, during 
part of July and August took up the study of the planarians parasitic 
upon the gills of Limulus. For this purpose he secured a large suite of 
materials and made a series of careful studies upon the nervous system 
and general structure of these singular parasites. New results of great 
iuterest with respect to the structure of the nervous system of these 
organisms were obtained by Mr. Woodworth. 
Dr. E. A. Andrews, a fellow in Johns Hopkins University, was engaged 
during July, August, and September in a series of investigations upon 
one of the gephyreair worms ( Phascolosoma ) and upon Diopatra , one of 
the common annelids. He also devoted some time to the study of the 
structure, the histology, and the physiology of digestion of Phascolosoma , 
and also its embryology. The development of the very remarkable ova 
of Diopatra occupied another portion of his time. A large number of 
finely executed drawings were made by him in the course of his work. 
Mr. T. H. Morgan, another fellow in biology in Johns Hopkins Uni- 
versity, devoted his attention to the study and collection of Ascidians 
or Tunicates. Of these he has investigated six genera in the laboratory 
during the summer, Salpa , Botryllus , Amouroecium, Molgula, Append ie- 
ularia , and Perophord. Mr. Morgan has been on a number of expedi- 
