182 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Atylus swammerclamii, M. Edw. 

 Dexamine spinosa (Mont.). 



Mr. I. C. Thompson reports as follows in regard to 

 Copepoda : — 



"During the 'John Fell' expedition of April 19th, a 

 quantity of fish were trawled. A search for fish parasites 

 led to two additions to the L.M.B.C. fauna, viz. : Trebius 

 caudatus, Kroyer, and Caligus diaphanus, Miiller, of which 

 the former were taken in numbers, both males and females, 

 from the Hake, and of the latter a few specimens were 

 found on the Cod. 



" On a specimen of Calanus finmarchicus, I found the 

 small parasitic Isopod Microniscus calani, belonging to 

 the Epicaridese. Although not infrequently met with on 

 Calani taken in more northern regions where the latter 

 are found in profusion, it appears not to be common 

 about our shores, and has hitherto escaped record in our 

 district. 



"W. Bridson, the Laboratory boy, has occasionally, 

 by means of the very convenient " Shellbend " boat, fixed 

 a tow-net to the buoy, near the breakwater, where it has 

 remained all night. Although no forms of Copepoda new 

 to the district have hitherto been met with through this 

 method, the results in material have been such as to 

 warrant our continuing it when practicable throughout 

 the coming year. 



" Washings of mud and sand taken at low water from 

 various parts of Port Erin bay, have resulted in our 

 obtaining a large variety of sedentary Copepoda, and 

 among them Mr. A. Scott has recently found some very 

 minute Harpacticidoe of one or more species new to 

 science, but which we are not yet prepared to describe. 

 Some of the rarer sedentary species are occasionally found 

 by this means in very large numbers, as was the case in 



