178 COLLECTING MOLLUSCA IN THE CELTIC REGION. 



On the coast of Brittany there appears to be a more 

 systematic shore hunt for crabs, etc., than with us. Dr. D. 

 suggests as a fruitful plan for collectors, to follow the hunters 

 and search the large stones and slabs of rock overturned, for 

 Haliotis, Fissurella, Patella, Lottia, Emarginula, Pleurobranchus 

 (plumula), Galeomma, and Murex. The so-called roots of 

 Laminaria and bunches of Corallina and of the horny Zoophytal 

 growths are to be minutely searched for Patella pellucida, 

 Odostomia, and Chemnitzia, and for Kellia, and other small 

 bivalves; also large Echinus and Asterias for Stylifer and 

 Montacuta. 



The September and March equinoctial tides are particularly 

 productive, as the commotion and the great recess and advance 

 of the waves send up on the beach many species not otherwise 

 easily met with. 



A search amongst the shell fish brought up to market is 

 often fruitful. Avicula, Pectens, Capulus, Fissurella, and 

 Emarginula may be looked for amongst Oysters and scallops ; 

 and sometimes a Pinna or a Triton may turn up. The stomachs 

 of fish often yield specimens of deepwater shells rarely pro- 

 curable. ' The Wrasse devours Lottia.' Codfish and haddock 

 are great collectors. 



Particular localities for exploration are the following : — 

 The entire circumferences of the roadstead of Brest, especially 

 on the N.W. from Kerhuon to the narrow entrance of the 

 harbour, particularly the surroundings of the port, and under 

 the fortifications of Brest ; below the castle at Postrein 

 and the ancient polygon ; at Lanninon ; the new pier heads of 

 the commercial port ; the piers of St. Marc, called Tristchler ; 

 the sand bank of St. Marc and Moulin Blanc ; the creeks of 

 the same name and of St. Barbe ; the rocks surrounding the 

 N.W. entrance to the harbour on the south coast ; the sand 

 bank of St. Jean; the coast of Plougastel ; the bay of Poulmic; 

 Fret ; the coast of L' He Longue, opposite Quelern, in 

 the direction of Chateaulin; the environs of Landivennec 



J.C, v., April, 1887. 



