194: DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
margin with a somewhat larger tooth at the base, and with some 
smaller teeth. 
Both species, when compared together, may be readily distin- 
guished by the ambulatory legs of S. Krausst being longer 
than those of the African form. The penultimate pair of ambu- 
latory legs in S. Araussi are about four times as long as the 
distance between the extraorbital teeth of the carapace, but in 
S. longipes only three times. The joints of these legs are more 
slender and more elongate than in the African species ; and thus 
the meropodites of the last pair of legs are about thrice as long 
as broad, whereas in S. longipes they are little more than twice as 
long as broad. So also the propodites of the penultimate pair 
of legs, the longest of all, are in S. Araussz about five times, 
but in S. longipes only three times as long as broad. The dacty- 
lopodites are also more elongate than in the species described 
by Krauss. The whole upper surface of its carapace is rather 
coarsely punctate; near the greatly divergent lateral margins 
it is somewhat hairy, and the sides are marked with a few 
oblique, elevated, slightly hairy lines, the foremost terminating 
at the anterior epibranchial tooth. The postfrontal lobes are 
but little prominent, and do not hide the front, when the 
carapace is looked at from above; the median groove is very 
deep, as in NS. longipes, and the cristate internal lobes are 
scarcely distinct from the much smaller external ones. The 
upper surface of the postfrontal lobes is transversely rugose. 
Dimensions of the male :— 
millim. 
Distance between the external orbital angles...... 134 
Length of the carapace (with the front) .......... 134 
Breadth of the front, between the eye-peduncles .. 63 
Breadth of the posterior margin of the cephalothorax 
between the basipodites of the last pair of legs .. 94 
Length of the larver hand...c.0..0) 2 eee 11 
Length of the first pair of ambulatory legs, the 
shortest of all .ow...:. s<.1i S08, oes a ee 29 
Length of the third pair of ambulatory ised the 
longest ot all © ..*.c2cu0 .2u 26 oh 52 
Length of the fourth (or last) pair of ambulatory 
ss PE ee We OE AS odoin S00: 6 32 
Length of the propodites of the longest pair of legs 12 
