118 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
12. Pseudione galacanthee, n. sp. 
Plate V. Fig. 2-2 i. 
Five adult females and the same number of males have been transmitted, 
(Compare “ Habitat.”) 
a. Female. 
The body about 14 times longer than broad. 
Head. It is somewhat broader than long, fused with the considerably 
curved first thoracic segment and encircled forward to the antero-lateral angle, 
while its anterior margin is slightly curved ; the frontal border is rather nar- 
row and turned somewhat upwards ; the dorsal surface is slightly convex, The 
antennule (Fig. 26, a) are in contact anteriorly, posteriorly they are separated. 
by a small, triangular frontal plate (p); they are of about medium size, 3- 
jointed ; the basal joint is rather large, thick, the second shorter and more 
slender, the third very small, terminating in an exceedingly short bristle. The 
antenne (b) are 4-jointed, rather short; the basal joint is very large, forming 
almost an oblique oval, yet the inner margin is almost straight, the outer very 
convex, and the second joint originates from its extero-anterior angle ; the second 
and third joints are short and slender, the fourth very small, terminating in an 
exceedingly short bristle. The frontal plate is already mentioned. The labrum 
is very broad; the hypopharynx is oblong-triangular with rounded vertex. 
Mandibles (d), maxillule (e), and maxille (f) do not present any interesting 
peculiarities. The left maxilliped is shown in Figure 2c; the palp is very 
conspicuous, with some hairs, but not jointed. The border behind the maxilli- 
peds is well developed, with numerous small, irregular protuberances, and only 
one pair of processes which are long and distally narrow. 
Thorax. The four anterior segments with ovarian bosses, which are low, 
and occupy about two thirds of the lateral margin of each segment ; the pleural 
plates which occupy the remaining one third of the margin, are short or narrow. 
The three posterior segments without bosses, but the pleural plates occupy the 
entire margin and are developed as lamella, increasing gradually in lengtir and 
turning more backward from the fifth to the seventh segment ; besides they are 
longer on the convex than on the other side of the animal. The legs are rather 
stout (Fig. 2d and Fig. 2e) ; the second joint about as broad as long, owing to 
the fact that on the whole outer side it is much expanded, with the outline 
almost semicircular; the fourth joint with a keel on the inner margin, and two 
short, knot-like keels are found on the same margin of the posterior, but disap- 
pear on the anterior pairs of legs. ‘The first left leg, with its marsupial plate, 
is shown in Fig. 2d; the plate has on the lower side a broad and high trans- 
verse keel, and on the upper side a structure similar to that in Munidion (see 
above). Only the last segment on the ventral side with numerous small in- 
cisions and between these low fleshy projections ; this structure is found both 
at the anterior and the posterior margin of the segment. 
