No. 416.] .THE TEXAN KG NEMNIA. 617 
External Anatomy. 
On comparing K. wheeleri with the figures and descriptions 
of Drs. Hansen and Sorensen for X. mirabilis the following 
differences are apparent: (1) the number and position of the 
hairs of the body; (2) the appendages of the reproductive 
orifice situated between the second and third segments of the 
abdomen; (3) the three pairs of prominent orifices on the 
ventral surface of segments four, five, and six, through: which 
the lung sacs are everted; (4) the lateral 
sense organs of the cephalothorax ; (5) the s ^ zi oN 
number of teeth on the two last joints of the /- à 
chelicerze. EONS 
The hairs over the ventral surface of the ü a 9n (UMP và 
abdomen of the Texan species are more 
numerous and are distributed in a manner palio m 
quite different from those over the abdomen 
of the old-world form. In the second seg- 
ment of the female there are three rows of me 
plumulose seta. The first row of six runs | 
across the ventral surface anterior to the e y 
: i : : ^ Mini 
middle line and is continuous with the hairs (ub. 
of the dorsal surface. These form a belt j 
around the second segment. The second i 
r 4 . Fic. 1. — Ventral surface 
row of six arises along the base of the tri- of the abdomen of male 
angular flap of the reproductive orifice. The 
third row is so irregular that it can scarcely be called a row. 
Here the hairs follow in a fashion the other two sides of the 
triangular appendage. Fig. 2 is a camera drawing of this 
portion of a specimen which has been treated with potassium 
hydrate. The figure clearly shows the arrangement of hairs 
over this region of the female. The dotted lines of the figure 
represent the portion of the organ which can be seen only by 
focusing through the triangular appendage. 
In segment two of the male there are three primary rows of 
plumulose hairs. The first row, consisting of from four to six 
small setze, runs across the ventral surface at about the middle 
of the segment and continues dorsally to form the circular row 
