38 . T. V. HODGSON. 
ANTARCTURUS FRANKLINI. 
(Plate V., figs. 2 and 3.) 
Arcturus franklini Hodgson (8), pp. 250-1. 
Specific characters :— 
A small spine at the antero-lateral angle of the cephalosome. 
Two prominent dorso-lateral spines on each of the first three segments of the mesosome ; 
epimeral spines as well. No dorso-lateral spines in the male. 
Urosome rounded, covered with small spines, with two slightly divergent terminal spurs. 
The original description being quite unsatisfactory, and as I have now more 
material, I will take this opportunity to redescribe the species. 
The body is usually covered with small, irregular chromatophores, which are most 
definitely arborescent on the cephalosome, which is smooth; its anterior margin is. 
incurved, and just behind the lateral angle is a stout spine. Two strongly developed 
and pointed horns lie behind the anterior margin and between the eyes. 
The three anterior segments of the mesosome are almost smooth, the fourth being 
covered with small spines; the first three carry a pair of very prominent spines dorso- 
laterally. The epimera of all four bear a stout spine, and there are also other smaller 
accessory ones, but these vary. The fourth segment is devoid of the prominent dorso- 
lateral spines. There is no great difference in the length of these segments, the first 
two are very nearly, if not quite, subequal, and the two following also, but these are 
a little longer. The three posterior segments are covered laterally with small spines, 
a band of them crosses each segment, forming a more or less prominent posterior 
fringe. 
The metasome is also covered with small spines ; although all the segments are 
rigidly united, the two anterior ones are distinct, the third is fused with the urosome ; 
there are no conspicuous spines here other than the two prominent ones which 
terminate the body ; one pair, however, is a little larger than the remainder. 
The first antenna is of the normal type; the first joint is short and stout, with its 
inner margin considerably expanded as a wing-like enlargement, the second joint is 
but little shorter and spindle-like, the third is but the merest trifle shorter still, and 
the fourth is scarcely as long as the two preceding ones together, and has nine groups 
of sensory sete. 
The second antenna is longer than the body ; the first joint is very small and 
scarcely noticeable from the dorsum, the second is longer and its distal border forms 
two spikes, one each side. The proportions of the remaining joints and flagellum are 
as 5'5. 14°5. 19. 15. The third joint has four or more prominent spines near its outer 
border, the following joint also has a series, but they are smaller and diminish to 
nothing along the joint, which is also covered, but not very plentifully, with small 
