236 Dr. R. Kochler on the Littoral Fauna of the 



by a high rocky pcrpencliculav barrier. It presents a series 

 of little bays in which the sea leaves bare sandy beaches of 

 very small extent. Throughout this coast the fauna is very 

 poor. Upon the rocks, which arc too much beaten by the 

 waves, Balani, Patella', and Littorince can hardly cling, and 

 the sandy beaclies shelter only a few very common Annelides. 



From this description of the shores of Jersey it will be seen 

 that it is especially and almost exclusively the south and 

 south-east regions of the coast that will be explored with 

 profit by the zoologist. The eastern and western coasts, at 

 low water, only present uniform sandy beaches, the fauna of 

 which is greatly reduced or almost null. As to the northern 

 shores they are not uncovered. 



From the St. Aubin Castle to and beyond La Rocque 

 the exposure at low water is very extensive, except at the 

 level of the ridge of the Town Hill, which divides into two 

 regions this immense extent of ground, which is so largely 

 uncovered — one situated to the Avest of a line ])assing from 

 the Town Hill to Elizabeth Castle, a not very interesting 

 region on the whole ; the other situated on the other side 

 of the above line and containing a varied and rich fauna. 

 This latter region, moreover, throughout its whole extent, 

 presents the same aspect and the same fauna. Except the 

 band of mud which extends before La Rocque in a south- 

 easterly direction, and which contains some peculiar species, 

 all the rest of the Banc de Violet is occupied by numerous 

 rocks of syenite covered by a rich vegetation of Algaj, in the 

 midst of which there are formed at low water a great number 

 of pools, having their bottoms occupied either by gravels or 

 by meadows of Zostera. In order to describe the fauna of 

 Jersey, therefore, it is not necessary to establish distinctions 

 between the diiferent regions explored, distinctions which 

 would be founded, if requisite, upon differences of fauna. 



Sponges. 



I have collected in J crsey a considerable number of species 

 of Sponges ; but a certain number of them I have hitherto 

 found it impossible to determine. 



Among the Calcareous Sponges it is scarcely necessary to 

 cite Sycon ciliatum, Hack., an extremely common species. 

 Leiicosolem'a hotrylloidcs, Bow., is pretty common among tlie 

 Zosterm, and Grantia compressa, Flem., is met with occasion- 

 ally at Elizabeth Castle, where we also find Dictyocylia- 

 drus ramosus, Bow., under rocks covered with Cynthia rustica. 

 On days of spring-tide fine specimens of Tethya lyncii- 



