234 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



jS'ote WORTHY Species and Hauls. 



There are a few of tlie species occurring in this year s 

 hauls that are of special interest. In the Diatoms, 

 Shicfotiema costatum, which had been found in great 

 abundance by George Murray in 1896, in Loch Etive, 

 and which we only met with rarely in previous years, 

 occurs more plentifully in our gatherings this year in the 

 Mull district. Amongst new recoixls we have Nitzschm 

 closferium (Loch Scavaig, v'^kye). Chaetoceras atlanticuin 

 (Moussa Sound) and Pi/rDct/stis hiniihi (Loch Hourn and 

 Tjoch Nevis). 



In Upper Loch Torridon, on luly l!)tli, with water 

 of very low salinity (1'01(S) due no doubt to mixture 

 witli fresh water from the land — we got two remarkable 

 hauls (coarse and fine nets) containing, along with a 



Upper Loch Torridon, 19/7/11. Fine Net. Coarse Net. 



Calanus helgolandiciis 6 — 



Pseudocalanus elonc;atus X — 



Nauplii .'. 10,000 15,700 



Fish eggs — 9 



Oikoplcura 136,500 42,000 



Tintinnidae 420,000 388,500 



Ceratiuin f urea x — 



,, tripos — 5,250 



Peridinium spp 2.052,500 351,700 



Dinophvsissp 189.000 21.000 



Chaetoceras boreale 1 ,470,000 1 ,454.000 



constrietum 1,102,500 141,700 



debile — 241,500 



decipiens 2,782,500 5,07(5,700 



spp lfi,117,500 2,709.000 



Nitzschia delicatissima 334,305,000 328,125 000 



seriata 73,.500 36,700 



Rhizosolenia semispina 346,500 871,500 



Skeletoncnia costatum _ 84,000 84,000 



Thalassiosira decipiens 378,000 — 



gravida 462,000 771,700 



iinmbcr of llie usual marine Diatoms, an enormous 

 (juaiitity of Nitzschid (Iclicdtissima which we estimate at 

 well over three hundred million individuals in ea(di net. 

 In this case the size oT llic iiicsh seenuMl to make so little 

 difference in the nature aiul iiiiiouiit of the catch that we 



