DUBLIN NATURAL HISTORY SOCIETY. 79 



Most of them died merely through neglect in changing the water, 

 which I generally do not oltener than once a month. The tank is kept 

 in a shady place, and uncovered, and the animals are but seldom fed, 

 and then as often on small snails or woodlice as anything else. The 

 sea water for change is kept in a large bottle, with a narrow neck and 

 transparent sides, closely corked, and sometimes, when used, has been 

 three months or upwards in the bo.ttle ; so that the keeping of marine 

 animals of the crustacean group is not such a difficult task as is com- 

 monly supposed. 



The zoes differ from those of Cancer pagurus in having no lateral or 

 frontal spines on the carapace ; in having no spines at the inner angle 

 of each joint of the abdomen below. The carapace is also very large; 

 the abdomen is divided into six rings ; the thoracic limbs are three (?), 

 the most anterior hardly to be distinguished in form from the ex- 

 ternal foot-jaw of many of the PorcellamdaD. 



A discussion arose regarding the practicability of growing AlgSB in 

 vivaria without a point of attachment. Professor Kinahan stated that 

 Ulva lactuca and JSnteromorpha intestinalia both do well thus, but that 

 he had found the latter Algse, even when attached, a bad tank plant, 

 as it is very apt to become yellow. He could not speak of any 

 other species, as he found them to answer so well that there was no ne- 

 cessity for change ; the brown weeds he had found were nearly certain 

 destruction to many of the Crustacea. 



Dr. J. K. KiNAHABT read a paper — 



ON THE OCCOIRENCE OF A NEW lEISH -ESOP PRAWN (PANDALUS), IN DUBLIN 



BAY. 



But one species of the genus Pandalus of Leach has been hitherto recorded 

 in Irelani Last July (1857), I met a specimen which appears to be 

 entitled to specific distinction : it occurred to me in a small sandpool in 

 the zostera bank at Sandycove; Kingstown. The shape of the beak ia 

 remarkably dissimilar from that organ in P. annulicomis, being much 



k 



