786 Notes on the Early Larval Stages of the (October, 
nately not having been worked out. The two maxillipeds (v1, vi) 
repeat each other in form; the basal joint giving rise to a simple 
o, 
Fic, 1.—A-D, young of Fiddler Crab; E, abdominal leg of larval Alpheus. 
exopodite (ex) and a four-jointed endopodite (7) in the first max- 
illiped, and a five-jointed one in the second. The new joints of 
the zoéa of the second stage and the first larval skin are to be 
seen in the figure, 
Our knowledge of the zoéa forms of the crabs, or Brachyurous 
Decapoda is really quite limited, especially when we consider the 
first larval stage. Careful studies on the embryonic zoea-forms 
only comprise those of Professor S. I. Smith and Mr. W. Faxon 
on the early stages of Hippa, those of Faxon and Professor 
Brooks on the early stages of Porcellana, and those of Faxon on 
the early stages of Carcinus menas and Panopeus say. Now ai 
zoéa of Porcellana, Hippa and Pagurus are, in the abdominal an 
other characters, quite different from those of the higher crabs, 
and approach those of the shrimps and other Anomura, and this 
is what we might expect, as these forms are intermediate ecient? 
the shrimps and true crabs. It is a matter of considerable _ 
est to learn something of the zoéa of Gelasimus, as with O 
it stands at the head of the crabs, above Cancer, Carcinus, Pano 
pus, etc. 
