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 

 imknovvn, 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 Lyamiysis spinicauda H. J. H. 



22. Cryptomysis lamellicauda, sp. nov. 

 Plate 3, figs. 2a-2m. 

 Fiji Islands. Off Vatu. Dec. 9, 1S97. Plankton, 30 fms. 1 adult female. A. Agassiz. 



Descriptio7i. — 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 nnich longer than the most proximal or the most 

 distal. 



Sixth abdominal segment considerably longer than the fifth. — The rami 

 of the uropods slender; the cxopod 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 

 alxjut 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, wliile 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 l:)eing 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. 



