CRYPTOTHIRIA BALANT. 271 
flagellum. The lower antennz are strong and elongated, 
consisting of four large basal joints, gradually diminishing 
in length and thickness, and terminated by an articulated 
flagellum. The seven segments of the body are furnished 
with the same number of legs, of which the first and 
second pairs are shorter and more robust than the rest, 
and terminated by an oval palm anda movable finger.* 
The remaining five pairs of legs are long and slender, the 
seventh or last pair especially being longer than the rest. 
The tail is obconical, the five anterior segments being 
furnished on the underside with as many pairs of 
branchial appendages, each consisting of an oblong basal 
piece, bearing two terminal branches, of which 
the inner is long and conical, and the outer 
shorter and pointed. Buchholz, on the con 
trary, represents them as consisting of a dilated 

basal subtriangular joint, terminated by two 
oval or suboval plates, strongly fringed at the 
posterior margin with long sete. 
The transformations which this minute active pedi- 
gerous animal undergoes in assuming the adult female 
form have been carefully observed and figured by Dr. 
Buchholz. In the earliest of these changes we observe 
a striking analogy with the form of the female Anceus, 
the three posterior segments of the body coalescing, 
losing their articulated character, and swelling out into a 
large mass, in which the segments are only indicated by 
lateral impressions; those of the tail, however, remain- 
ing distinct.+ In the following stage the tail is entirely 
absorbed, forming a terminal exarticulate conical mass, 
continuous with the lobes of the body, but with the 
* In our specimen we could not determine the precise form of the first 
pair of legs, and which are not quite correctly given in our figure. 
+ See Vignette in page 260. 
