102 STALK- AND SESSILE-EYED CRUSTACEA 
all between the stylets, so as to separate their bases, on the contrary 
these stylets are close alongside of one another from their bases, more- 
over, they project but very little beyond the outline of the abdomen, 
the large branch being very short and obtuse, and not long and sub- 
ulate as in the adult ornatus, and the smaller branch quite slender and 
arising from a point far anterior to the base of the larger branch. 
Head short transverse. Eyes rather large and prominent. Antenne 
short, curving outward, with five basal joints and a terminal flagellum, 
which is indistinctly 5-6 joited, surface minutely spimulous. Last 
thoracic segment not shorter than the preceding, and last pair of 
thoracic legs of the usual size and character. Abdomen filling the 
concavity below the last thoracic segment, and forming a semicircle 
beyond it. Last abdominal segment smallest ; third, fourth, and fifth 
segments much produced backward on either side. Surface of thorax 
and abdomen with a few very short scattered spinules. 
Dana observes, that, if this be a distinct species, it is also a distinct 
genus, the seventh pair of legs being of full size, and that it may be 
named Actwcia euchroa, as designated in his earlier MSS. 
109. Scyphax intermedius. PI. II, fig. 8. 
Scyphax intermedius, Miers, Ann. Mag. Nat. Hist. (ser. 4) xvii, 
p. 227, (1876). 
Resembles S. ornatus, Dana, but with the terminal segment broadest 
at base, covering the bases of the penultimate segment, then suddenly 
narrowing, subacute at the extremity, with the lateral margins con- 
cave, the part between the bases of the caudal stylets being of a 
triangular shape with a slight depression on its upper surface. Length 
2 in. 
New Zealand (Coll. Brit. Mus.). 
In the single adult specimen of this species in the Museum Collec- 
tion, the caudal stylets have unfortunately been broken off, and only 
the basal joints are left ; these, though not quite close to one another, 
are much less widely separated than the same joints in Dana’s figure 
of S. ornatus. The broad and truncate terminal abdominal segment of 
S. ornatus is, however, so unlike the usual form of this organ in 
the Oniscide, that I cannot help thinking that there is some error 
in the figure and description of Dana. 
