4.94, GEOFFREY SMITH. 
Krejcii, which he places together with Gampsonyx, 
Paleocaris, Acanthotelson and Mectotelson in a 
sub-order of the Podopthalmata, which he names Simpli- 
cipoda. Professor Fritsch believes that Gasocaris had 
simple uniramous thoracic limbs, and he also ascribes this 
character to the other genera, despite Packard’s assertion in 
regard to Palwocaris, and the apparent condition of 
Gampsonyx. Professor Fritsch denies that any of these 
forms is related to Anaspides, or to any other Schizopod, 
on the ground of their possessing uniramous limbs. As 
Calman (18) has pointed out, the mere fact, if it were 
established, that some of these fossil forms had uniramous 
limbs would not invalidate the conclusion that they are 
related to Anaspides. This relationship is established more 
effectively by such common characters as the lack of a 
carapace, the eight free thoracic segments, the pedunculated 
eyes and form of the antenne, tail-fan and telson. With 
regard to the possession of biramous limbs, we know now 
that Preanaspides exhibited this character, and the same 
is true of Palewocaris and perhaps of Gampsonyx. It 
must also be remembered that the exopodites of the thoracic 
limbs in Anaspides and its living allies are exceedingly 
slender and delicate structures, and that even in the 
beautifully preserved fossil Preeanaspides they are by no 
means easy to be made out, though they are demonstrably 
present. We cannot therefore attach great weight to 
Professor Fritsch’s assertion that they are altogether absent 
in Gasocaris and Gampsonyx, and even if this is the case, it 
would not alter our conviction that these forms are closely 
related to Anaspides. The fossil, Gasocaris (see text-figs. 
59, 60, 61), the details of whose structure Professor Fritsch 
so beautifully illustrates, reproduces with great exactitude 
the essential features of Anaspides. The pedunculated 
eyes, the first antennee with three jointed peduncles, the 
second antennz with their scales, the entire absence of a 
carapace, the form of the telson and tail-fan, are all nearly 
identical with the corresponding features in Anaspides. 
