Description of Two New Phyllopoda. 



and elongated. Antennæ about the length of the antennulæ, 

 applauated, foliaceous, not compressed, and having at the 

 obtusely rounded tip a very short pointed projection. Legs 

 apparently of the usual structure, outer part of endopodite 

 broadly rounded, exopodite lamelliform, much smaller on 

 the 1st than on the succeeding pairs, basal plate minutely 

 and regularly serrated. Marsupium rather short and narrow, 

 scarcely reaching beyond the 2nd caudal segment; enclosed 

 ova of a very peculiar shape, being each surrounded by a 

 tetrahedric shell. Caudal rami very much elongated, being 

 about half the length of the tail proper, and rather narrow, 

 tapered distally, and fringed all round with strong plumons 

 setæ. Body, in the living state of the animal, highly pellucid, 

 nearly colourless, caudal rami, however, tinged with a vivid 

 reddish orange; eggs in the marsupium dark horn-coloured. 

 Length of the adult female 9 mm. 



Remarks. — As above stated, this form shows some 

 resemblance in its external appearance to the female of 

 S. similis, as figured by Baird, though being still more 

 slender, and having the caudal rami comparatively longer. 

 Moreover, the marsupium is shorter, and the enclosed ova 

 apparently of a very different shape. 



Description of the female. 



The length of the solitary adult specimen examined is 

 about 9 mm., measured from the front to the tip of the 

 caudal rami, and this form is accordingly somewhat inferior 

 in size to the other known species of the genus. 



The body (see PL I, figs 1, 2) is extremely slender, 

 resembling in this respect the species of the genera 



