Botanical Society of Edinburgh. 3j^ 



Family Limnadiad;^:*^';^' f ^ '^'' 



- ■■ ■'! '■-' " -'TfJI 'f<T) f/b 801(( f) . ,;C^ 



- Genus LimnadiaIzo biod ol iia in-ib cilbh 



op. LiMNADIA ANTILLARUM, UOV. SJ). - 



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 

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

 consist of nine articulations, each having one or two long plumose 

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

 joint on the upper edge. Caudal lamellee 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 ^fti>4 

 slightly serrated on upper edge. Feet 18 pairs. s ■ ,.>\o 



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

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



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

 pace and in having the setee of antennae and tail plumose. 

 .. Hab. St. Domingo, West Indies; M. SalU. Mus. Brit. ,:^ 



iO 

 Genus EsTHERiA. v.\ 



. Sp. EsTHERIA DaLLASII, UOV. Sp. 



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 light 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 over with 

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

 somewhat in structure to that of hrasiliensis. It differs from that 

 species however in size and in being of a more rounded oval shape. 



Hab. Brazil? I am indebted for this species to Mr. Dallas, who 

 found it in a collection of insects chiefly from Brazil. Mus. Brki- -j 



BOTANICAL SOCIETY OF EDINBURGH. 



jfjjgjmie 8, 1854. — Professor Balfour, President, in the Chair. / 



,£>.Tq*|je following papers were read : — 



•^^'-i. ** On the Plants of the Coal Epoch, and on the general Struc- 

 ture of Coal," by Professor Balfour. 



After alluding to the importance of studying carefully the Fossil 

 Flora, Dr. Balfour proceeded to make remarks on the structure of 

 the plants connected with the Coal epoch. He particularly noticed 



