204 THE SCHIZOPODA. 
Remarks.— This new genus belongs to the subfamily Mysinae and is easily 
distinguished from all other genera by the shape of the telson. The male being 
unknown, I am unable to decide with any certainty whether the genus ought 
to be referred to the tribe Leptomysini or to the real Mysini. The shape of 
the antennal squama, of the maxillae and their palp, and the absence of lobes on 
the third and fourth joints of the maxillipeds seem to indicate relationship to 
the Leptomysini, while the shape of the telson resembles feebly that in Anisomy- 
sis laticauda H. J. H., which belongs to the tribe Mysini. The armature of 
the second joint of the mandibular palps bears a superficial similarity to the 
structure found in Lycomysis spinicauda H. J. H. 
22. Cryptomysis lamellicauda, sp. nov. 
Plate 3, figs. 2a—2m. 
Fiji Islands. Off Vatu. Dec. 9, 1897. Plankton, 30 fms. 1 adult female. A. Agassiz. 
Description.— Frontal plate (fig. 2a) about twice as broad as long, with 
the end very acute and distinctly acuminate.— Eyes very large, black.— An- 
tennal squama (fig. 2b) between seven and eight times as long as broad, tapering 
from the middle, with the narrow end transverse and with the suture from the ~ 
insertion of the penultimate lateral inner seta to the corresponding incision on 
the outer margin; the terminal joint not fully twice as long as broad.— Second 
joint of the mandibular palp (fig. 2e) with about thirteen teeth along the inner 
margin, those near the middle much longer than the most proximal or the most 
distal. 
Sixth abdominal segment considerably longer than the fifth— The rami 
of the uropods slender; the exopod almost seven times as long as broad, and 
considerably longer than the endopod.— Telson scarcely half as long as the 
endopod of the uropods, not fully half as long again as broad; the proximal part 
about as long as broad, with four somewhat strong spines towards the end 
of each margin; the distal portion a little more than half as broad again as long, 
with twenty spines, the lateral ones smaller and regularly tapering to the acute 
end, while the spines along the transverse and nearly straight posterior margin 
are longer, stronger, and taper only from beyond the middle to the acute end. 
Length of the single specimen, a female with marsupium, 5.8 mm. 
Remarks.— The specimen is dark coloured, but being far from well pre- 
served and somewhat shrivelled in front it is not impossible that the dark colour 
may be due to the state of preservation. 
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