300 Dr. E. Koeliler on the Littoral Fauna of the 



Pleinmont Point, which forms the south-western extremity 

 of the island of Guernsey. I have explored this coast through 

 nearly its whole extent except the little bays of Perelle and 

 Pecqueri^s. 



L'Ancresse Bay is very poor, only presenting naked rocks, 

 upon which is found Actinia equina^ var. fragacea. It pos- 

 sesses no interest. 



The Grand Havre is an interesting station as regards its 

 fauna. The Algaj which cover the stones harbour many of 

 the lower Crustacea [Idotea tricuspidata and /. appendicalata^ 

 Atylus Sioammerdamii, Podocerus falcatus, Ayionyx Ed- 

 icordsri), together with Galaiheasquamrfera, Athanas m'tescens, 

 Stenorhynchx(S phaJangium^ X^antho fiorida^ &c. Among the 

 Polychseta I found especially Phyllodoce lamellosa, Eidalia 

 clavigera^ Glycera capitata^ Eteone longa, Siphonostomum 

 uncinatum^ &c. Ascidia producta and Cynthia sulcatula are 

 common. The rocks are clothed with tufts of Cynthia i^ustica, 

 under which the worms and Crustacea live. The sponges are 

 tolerably varied — Tethya Jyncurium^ Dictyocylindrus ramosus^ 

 HaJichondria incrusfanSj &c. 



Cobo and Vazon Bays appear to me to be rather poor. 

 The sand which occupies the bottom of them only contains a 

 few not very interesting Annelides, and the rocks are covered 

 with very common sponges (at least so far as I have deter- 

 mined them). At Cobo I found a specimen of Ghalinacervi- 

 cornis ; but it had been thrown up by the sea. At Vazon 

 Bay Pholas dactylus is pretty common. In this bay are found 

 the remains of a submerged forest, from which the inhabitants 

 formerly obtained a considerable quantity of combustible 

 material ; in the country they give the name of corhan to 

 these submerged remains. 



The neighbourhood of the island, of Lihou and Rocquaine 

 Bay, on the other hand, present a tolerably rich fauna. The 

 physiognomy of this region, both as regards the configuration 

 of the coast and the aspect of the rocks at low water and as 

 regards the fauna, is absolutely identical with that of the 

 southern region of Jersey, for example at the Gr^ve d^Azette. 

 The sea forms numerous pools, of which tlie bottoms are 

 carpeted with Zosterce, and the rocks are covered with Algje, 

 among which swarm Crustacea, small Polychseta, and Com- 

 pound Ascidia. Some species which are scarce or wanting in 

 Jersey are met with at this station ; the Co7)iatuIa', for ex- 

 ample, are very common there, as also Glycera capitata. I 

 have also found some examples of Cucumaria pentactes and 

 one of C.frondosa. 



Starting from Pleinmont the coast rises rather suddenly and 



