60 PELAGIC LIFE, FALMOTJTH. 



Centropages typicus, and Calanus finmarchius were all fairly- 

 numerous. Amongst the rarer forms may be recorded one 

 advanced larva of Actinotrocha, and a single specimen of 

 Monstrilla rigida. 



Protozoa. In the early part of May I filled a large 

 collecting bottle with mud and water from Penryn creek, and 

 on examining some of the sediment the next day with the 

 microscope, I was pleased to detect some of the finest examples 

 of the common Amoeba I have ever seen. 



Nemertines. Early in July a fisherman, whom I occasion- 

 ally employ, brought me a specimen of Lineus marinus, v/hich 

 measured fourteen feet in length. This specimen had been 

 found in a mass of Laminaria and other weeds which were 

 growing on the buoy which supported his mooring chain. 

 Hitherto I have only found this species underneath stones which 

 were exposed at low water, and to find a specimen in such an 

 unusual place and where the water was never less than twelve 

 feet in depth, seemed to me exceptional and worth recording. 



Annelids. In addition to finding numerous specimens of 

 Phoronis attached to the shells of dead oysters, I found a very 

 fine colony of these worms, during July, occupying a small area of 

 the vertical granite wall at the base of the Eastern breakwater. 

 Myxicola steenstrupi was very abundant on a small patch of 

 mud exposed at low-water spring-tides in front of my hut. On 

 the mud flats at Helford this species is exceptionally abundant 

 during the spring and summer of every year. 



PoLYZOA. Clusters of Bowerbankia imbricata were 

 unusually abundant on the under surfaces of the beams of 

 timber with which the eastern breakwater is built. Fine 

 specimens of Bugula flabellata and Pedicellina were dredged, 

 during July, in the main channel of the harbour. 



MoLLUscA. During my shore hunting expeditions and 

 dredging trips to various places in the district, I have been 

 particularly struck by the absence of Nudibranchs during the 

 year. Not more than six specimens of .^olis papillosa have 

 been seen during this time ; and the sides of the coal-hulks, 

 which I have found in previous years such excellent collecting 

 grounds, have been practically deserted by these mollusks. Oo 



