Description of Two New Phyllopoda. 



dorsally. From this region proceeds ventrally the marsupium, 

 or ovisac, the free end of which is extended backwards in 

 the form of a somewhat conically tapered tube, having at 

 the tip a valvular opening, through which the ova are 

 expelled, when mature. This free part of the marsupium 

 is rather short, scarcely reaching beyond the 2nd segment 

 of the tail proper. The latter is very narrow, cylindric in 

 form, and is divided into 7 well-defined segments, the last 

 of which is very short, and slightly produced in the middle, 

 where the anal orifice occurs (see fig. 1). To this segment 

 the caudal rami are attached, being extended posteriorly 

 and more or less diverging. 



The eyes (see figs. 1, 2, 3) are rather large, and move 

 freely, extending generally more or less straight laterally, 

 immediately behind the insertions of the antennæ. They 

 exhibit a pronouncedly pyriform shape, being considerably 

 constricted at the base, and gradually widening distally. The 

 eye-ball proper, occupying the extremity of the eye, is 

 globularly expanded, and exhibits a very great number of 

 visual elements radiating from the dark pigment and forming 

 a clear zone around it. 



The ocellus (ibid.) is very small, and occurs in the 

 middle of the foremost part of the head as a punctiform, 

 dark red pigmentary spot. 



The 1st pair of antennæ, or the antennulæ (see figs. 

 1, 2, 3), are rather slender and elongated, in length con- 

 siderably exceeding the head, and in the living animal are 

 generally extended anteriorly and somewhat divergent. They 

 are of a very delicate structure, narrow cylindric in form, 

 and slightly tapering towards the tip, which carries a number 

 of small olfactory papillæ, and a single somewhat longer 

 sensory bristle. 



