{Whi 
IV. 
fT, 
ITy, 
CONTENTS. 
R. W. SHuFeEtpt, M.D., C.M.Z.S. 
Further Studies on Grammicolepis Bra- 
chiusculus, Poey . 
Eo COPE: 
On the Relation of the Hyotd and Otic 
Elements of the Skeleton tn the Batra- 
chia 
R. W. SHuFELDT, M.D., C.M.Z.S. 
On the Affinities of Aphriza Virgata 
No. 3.— April, 1889. 
CHARLES-SEDGWICK Minot, Harvard Medical 
School, Boston, Mass. 
Uterus and Embryo: 1. Rabbit; I. Man, 
EDWARD PHELPS ALLIS, JR. 
The Anatomy and Development of the 
Lateral Line System in Amita Calva. 
Pror. A. E. DotBeEar, College Hill, Mass. 
On the Organization of Atoms and Mole- 
cules 
C. O. WHITMAN. 
Some New Facts about the Hirudinea 
Dr. WILLIAM PATTEN. 
Segmental Sense-Organs of Arthropods . 
PAGES 
271-296 
297-310 
311-340 
341-462 
463-568 
569-585 
586-599 
600-602 
