Thomas Harrison Montgomeryf. 
By 
E. B. Wilson. 
By the death of Professor Thomas Harrisox Moxtgo:mery, whic-li 
took place at Philadelphia, March 19, 1912, America loses an investigator 
Avhose contributions especially to cytology have played an important 
part in the advances of the past fifteen years. He was born in Xew A^ork, 
March 5, 1873. After studying at the University of Pennsylvania be- 
tween 1889 and 1891, he continned his studies at the University of Berlin, 
where he received the degree of Ph. D. in 1894. In 1896 he became Assi- 
stant Professor at the University of Pennsylvania and in 1903 Professor 
at the University of Texas. In 1908 he was called to the UniA^rsity of 
Pennsylvania as Professor of Zoology and director of the Department 
of Zoology; and here the last two years of his life were largely gh^en to 
the planning and constrnction of an admirable laboratory of zoology that 
was bronght to completion only a few months before his death. He was 
a niember of niany scientific societies, an associate editor of the Journal 
of Morphology, and a trnstee of the Marine Biological Laboratory at 
Wood’s Hole, Mass. 
Professor Moxtgomery’s pnblished researches comprise upAvards of 
eighty AA’orks, theAA'ide ränge ofwhich gives some indication of the breadth 
of his scientific interests. He was a thoroughly eqnipped general natiira- 
list, Avell A-ersed and ahvays keenly interested in field zoology and eom- 
paratiA^e morphology; and a eonsiderable nnmber of his papers dealt 
with Problems of animal behavior, anatomy and deA^elopment. Among 
the animals that formed the snbjects of these studies Avere birds, spiders, 
insects, rotifers, nemertines and neniatodes; his observations on the 
habits of spiders, admirably carried ont, are of especial interest. He 
