94 TEANSACTIONS LIVEEPOOL BIOLOGICAL SOCIETY. 



earlier bottles. As the main food of the Greenland whale, 

 this species is very abundant in Arctic Seas and is 

 commonly found around our coasts during the winter 

 and spring, becoming scarce or almost disappearing during 

 the warmth of summer. 



The more delicate free-swimmers Oithona spinifrons 

 and Acartia clausii on the contrary it will be seen both 

 appear in the middle of April (No. 6) and continue 

 generally present in the subsequent tow-nettings through- 

 out the summer. A reference to the distribution table 

 will show that the late autumn gathering of October 16th 

 was much the most prolific in species, fifteen species 

 being then taken. 



Six of the species found are decidedly rare, viz., 

 Metridia armata, Candace pectinata, Pseudocalanus arm- 

 atns, Monstrilla rigida, Corycceus speciosus, and Onccea 

 mediterranean. The first named, a few specimens occurring 

 in Nos. 11 and 17 and 18, is usually a surface animal and 

 its first recorded British habitats are in the Valencia neigh- 

 bourhood (Brady's " Free and Semi-parastic Copepoda of 

 the British Islands," Vol. I., p. 42). I have taken it very 

 sparingly in Liverpool Bay and in parts of the Clyde, and 

 Scott reports it from the Forth. Candace pectinata 

 occurs in four gatherings, Nos. 5, 14 and 16, and 18. It 

 is usually found at a considerable depth below the surface 

 as is the case with No. 5 specimen ; I have found it in 

 tow-nettings taken off the Boss of Mull at 55 fathoms, 

 and about the surface off Oban, and plentifully in the 

 Mediterranean. Monstrilla rigida, a single specimen of 

 which occurs in No. 7 has not yet disclosed its life-history. 

 From the absence of functional parts and especially of 

 mouth organs, the species of this mysterious genus seem 

 to give evidence of some other phase of existence, although 

 so far as I am aware no such phase has hitherto been 





