30 



Genus Streptocephalus ? 



4. A figure of a species of Branehipode was exhibited at a meeting 

 of the Zoological Society by Dr. Nicholson in February 1851. The 

 figure was not sufficiently accurately made to enable the species or 

 genus to be made out. In all probabOity, however, it may prove to 

 be a species of Streptocephalus. It is a native of India and inhabits 

 freshwater ponds. 



Genus Artemia? 



M. Audouin, in the Ann. de la Soc. Ent. de la France, v. Bull. 

 61, 1836, mentions a species oi Artemia closely allied to Art. salina, 

 as inhabiting the salt lakes of Egypt. In the Ann. des Sc. Nat. 

 2nd ser. ^-i. 230, he again mentions the fact, that numbers of ArtemicB 

 have been found in the "lacs de natron " in Egypt ; but no further 

 description has ever been given of them. 



Family Limnadiad^. 

 Genus Limnadia. 



Sp. Limnadia antillarum, nov. sp. (Tab. XXIII. fig. 1). 



Carapace valves of a rounded oval shape, and of a transparent 

 whitish colour ; prominent on dorsal margin where the muscular 

 attachment of the body takes place, sloping from thence rather sud- 

 denly towards anterior extremity where it forms a somewhat blunt 

 point, and more gradually to posterior extremity, which, as well as 

 ventral margin, is rounded. Antennules bluntly serrated or crenu- 

 lated on their upper edge, rather shorter than the peduncles of large 

 antennse, which are stout and not half the length of the body. They 

 consist of nine articulations, each ha^■i^g one or two long plumose 

 setse springing from the under edge, and one short stout spine at each 

 joint on the upper edge. Caudal lamellae of considerable length, and 

 beset on upper edge with long plumose setae to within a short di- 

 stance of the tip, which is somewhat curved, sharp-pointed and 

 slightly serrated on upper edge. Feet 18 pairs. 



The structure of the carapace is the same as in Limnadia Her- 

 manni, the surface being covered with minute dots or pvmcturations. 



This species differs from the two others in the shape of the cara- 

 pace and in having the setae of antennas and tail plumose. 



Hab. St. Domingo, West Indies ; M. Salle. Mus. Brit. 



Genus Estheria. 



Sp. Estheria Dallasii, nov. sp. (Tab. XXIII. fig. 5). 



Carapace valves shortly obovate and flat, upper margin from the 

 beaks to two-thirds of its length almost straight ; anterior extremity 

 rather broader than posterior. Beaks prominent and situated near an- 

 terior extremity. The shell is of a hght horny colour and very thin and 

 translucent. Ribs elevated, smooth and numerous, about 20 in num- 

 ber. The intermediate spaces are concave and are covered all o\er with 

 rough-looking spots of an irregular size and appearance, approaching 



