232 BRITISH ENTOMOSTRACA. 



From a careful examination of specimens sent me by 

 Mr. Thompson, o{ Anomalocera Pafersonii from Ireland, 

 and Irenmis sjjJendidus from Scotland, from an exami- 

 nation of the specimens of Irenceus sent by Mr. Goodsir 

 himself to tlie British Museum, and from the figiu-es of 

 the two given by Mr. Templeton and Mr. Goodsir, I have 

 no doubt they are identically the same. The tubular 

 organ in which the eye is situated in Irenasus, and which 

 forms, according to Mr. Goodsir, the chief generic cha- 

 racter, is merely the peduncle upon which the eye is 

 placed, and wliicli is well described in Anomalocera, by 

 Mr. Templeton. Mr. Goodsir's description of Irenseus 

 seems to have been taken from a male specimen. He 

 describes the little animal, wdien ahve, as of a very bril- 

 liant appearance. " The whole animal," he says, *' gives 

 forth a kind of luminous appearance, which is apparently 

 caused by the splendid metallic colours with which it is 

 adorned. The })revai]ing colours are sapphirine and 

 emerald." 



" The coloiu' of the animal," says Mr. Paterson, as 

 quoted by Mr. Templeton, " is a bright green, mottled 

 with darker shadings ; the green colour is very fugacious, 

 and observable only in recent specimens .... The first 

 time," he continues, " on which I took any of these, was 

 in crossing the ferry at the mouth of Larue Lough, 

 county Antrim, in the evening of the 2d of May. They 

 were so numerous, that in the space of fifteen minutes 

 above three hundred were taken. Though kept in a 

 glass jar of sea- water they all died during the night, and 

 were almost colourless next morning .... They swim 

 with a lively and constant motion, and jerk themselves 

 out of the w^ay when pursued. They form a portion of 

 the food of a tentaculated Beroe." (pp. 39, 40.) 



llah. — Mouth of Larne Lough, county of Antrim, 

 Mr. Templeton, W. Thompson, Esq. {Anomalocera) ; 

 Frith of Forth, Mr. Goodsir; Kyles of Bute, W. Thompson, 

 Esq. {JreiicpJis) ; Brit. Mus. 



