18 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
The dactylopodites are armed with a row of acute spinules 
along their inner margins; these spinules gradually increase in 
length towards the tip. 
In the smaller (female) specimens the anterior legs are com- 
paratively smaller. 
In H. Pleione the hands of the male are a little shorter in 
proportion to the length of the cephalothorax than in this species, 
and they also present a somewhat less slender form. 
The body of this Hyastenus is covered with a short pubes- 
cence on which some longer curved hairs are distributed ; similar 
longer hairs also occur on the spines of the rostrum and on the 
ambulatory legs. 
Dimensions of the larger male specimen :— 
millim. 
Length of the whole body -...:..a.. suse 264 
Length of the cephalothorax .................. 15 
Distance between the external orbital angles .... 64 
Breadth of the cephalothotax ........,2<ts:ec08 13 
Distance between the antero-internal angles of the 
suprzorbital marpiris 4........1..- secs 4 
Distance between the tips of the spines of the 
POSHMUI, 2 2 ined sid. oyewinld oh Ge aay ORS ee ee 7 
Length of the anterior legs..............00000- 30 
Length of the hands (the fingers included) ...... 124 
Length of the first pair of ambulatory legs ...... 39 
Length of the last pair of ambulatory legs ...... 20 
5. Hyastenus Pretonr, Herbst. 
Cancer Pleione, Herbst, Naturgeschichte der Krabben und Krebse, t. iii. 
p. 52, Taf. lvni. fig. 5. 
Naxia Pleione, Gerstdcker, Carcinologische Beitrige, 1856, p. 114, Taf. v. 
figs. 1 & 2. 
Hyastenus Pleione, A. Milne-Edwards, Nouv. Arch. du Muséum Hist. 
Nat. t. viii. p. 250. 
The Collection contains four small specimens of a Hyastenus, 
which I refer to Herbst’s H. Pleione, as they present almost 
all the characters of this species, communicated to me by 
Dr. Hilgendorf. These individuals were collected at Sullivan 
Island. 
The largest specimen is only 15 millim. long (the rostral 
spines included) ; a female, already bearing eggs, is only 10 
millim. long, including the spines of the rostrum. The spines 
of the rostrum are directed downward, so that they lie in 
