Notices of Memoirs — Topley's Agricultural Geology. 81 



I. — On Faljemon exul, a New Ckustacean fkom the Polir- 



SCHIErER OF KUTSCHLIN, NEAR BiLIN, IN BoHEMIA, By PrO- 



fessor Dr. Anton Frio. 



THE thorax is eight mm. long, and three mm. broad; the mesial 

 line of the front part shows a high crest, which bears six spines, 

 pointing towards the rostrum. On each side of the crest are situated 

 what appear to be the eyes ; the facettes of which, however, can- 

 not be identified. 'The inner antennae have a three-jointed basal- 

 portion ; only two of the whips (Geissel) are preserved. These are 

 of the length of the thorax, the outer one being considerably 

 stronger than the inner one. Of the third whip (Geissel), which true 

 Paleemons do not j^ossess, Dr. Fric can only detect a rudiment. The 

 outer antennee have a large scale at their base, which covers about 

 ten joints of the antennae. The whip is much stronger than those of 

 the inner antennae. The first pair of legs is small. The second is 

 the strongest, and bears small chelte, and projects five mm. beyond 

 the margin of the thorax. The third and fourth pairs are weak ; 

 the fifth of double the strength and size of the previous one. The 

 abdominal segments agree exactly in outline with those of Palcemon ; 

 as also do the five-leafed tail-fin. 



The discovery of this exquisite marine crustacean in a freshwater 

 deposit is very remarkable. After the upheaval of continents 

 small basins of saltwater sometimes remain inland, which after a 

 time lose their salt ; in consequence of which the marine animals 

 living therein either die out or become naturalized in the freshwater. 

 So we find the genera Idothcea, Sphceroma, and Gammarus, in the 

 rivers and lakes of Tuscany, and Mysis in the lakes of Sweden. 

 Also the Adelsberg caves have their blind Palcemon — Troglocharis 

 Schmidti. It is interesting to know that the recently-discovered 

 Crustacean from Ob. Nowall, near Waltsh, resembles more a marine 

 millipede than a land millipede. 



II. — On THE Agricultural Geology of the Weald. By W. 

 TopLEY, F.G.S. From the Journ. Eoyal Agric. Soc, vol. viii. 

 1872. 



THE Wealds of Kent, Surrey, and Sussex, with their border-lands 

 of hill and vale, have such special interest for the geologist 

 that we welcome every good addition to our knowledge of this 

 portion of England and every aid to the advancement of that know- 

 ledge. Mr. Topley, especially addressing agriculturists in this 

 pamphlet, gives accurate geological information in text, tables, and 

 coloured map, which will be fully appreciated by geologists. We 

 already possess, as an important aid in study, the somewhat smaller 

 but beautifully perfect, map constructed by Mr. W. Whitaker for the 



VOL. X. — NO. CIV. fi 



