16 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



from a male specimen, and soon afforded good examples of 

 spiral cleavage. In two days we had in our jars thou- 

 sands of minute ciliated larvae, .showing various interesting 

 phases. 



' (2) In the hope of finding young stages of Arenicola 

 grubii or ecaudata, I cut off from the blocks of the break- 

 water a large number of the ' roots ' of Laminaria, and 

 brought them into the Laboratory to examine. A few of 

 the more promising* were placed in a dish of sea-water 

 overnight. In the morning among other objects found 

 there was a small female Monstrilla, still enclosed in a 

 portion of the last larval skin, and therefore only newly 

 liberated from its host. On looking over the 'roots ' in the 

 dish I found altogether some thirty specimens of a small 

 tubicolous Polychsete, probably a species of Salmacina, 

 and on examination these proved to contain young speci- 

 mens of the Monstrilla. The fact that this material can 

 be obtained at Port Erin may be of use to those who are 

 interested in the peculiar life history of this remarkable 

 Copepod. 



" I would here express my sincere thanks to Professor 

 Herdman for putting the resources of the Laboratory at 

 my disposal. — J. H. Ash worth." 



As a contribution to the number of eggs produced by 

 Crustacea, it may be useful to record that Mr. Robert 

 Okell, F.L.S., examined two berried specimens of the large 

 spiny lobster or sea crayfish, Palinurus vulgaris, from the 

 Aquarium, with the following result : — 



No. 1. Weight 5 lbs. 



Total eggs weighed 148.53 grms. 



•°>00 eggs counted weighed .2468 grms. 



Total number of eggs = 180,000. 



