226 



(Nardo, 1 841) ; but I am at a loss to know why Schmidt fancies this 

 species has been overlooked by Bowerbank. Dr. Gray has distributed 

 the species of Mr. Hancock among seven genera.* 



Halisarca dujardinii. 



Will probably be found when attentively looked for all around our 

 coasts. Prof. Dickie has found it on Strangford Lough, and I have 

 taken it at Malahide. There is evidently some mistake about the 

 species of this genus, as Dr. Bowerbank informs me that he meets 

 with spicules in the above species, while Lieberkuhn and Schmidt 

 describe it as aspiculous, making it the type of an Order. 



Halichondria panicea (Pallas) . 

 Common everywhere. Schmidt says this species should be, without 

 any question, referred to Nardo's genus Reniera. 



H. thompsoni (Bowerbank). 

 Dendoryx thompsoni (Gray). Proc. Zool. Soc. Lond. 1865, p. 537. 



This species is described by Dr. Bowerbank from a specimen taken 

 in Belfast Lough by the late W. Thompson. 



H. incrustans (Esper). 



Dendoryx incrustans (Gray). Proc. Zool. Soc. Lond. 1865, p. 537. 



Eoundstone Bay (M'Calla). Bantry Bay and Malahide, and probably in 

 all suitable localities around the coast. Schmidt does not think that 

 this species should be placed in the genus Halichondria. 



H. dickiei (Bowerbank). 



Dendoryx dickiei (Gray). Proc. Zool. Soc. Lond. 1865, p. 537- 

 Strangford Lough. 



H. pattersoni (Bowerbank). 



Dendoryx pattersonii (Gray). Proc. Zool. Soc. Lond. 1867, p. 535. 



Both these species are from Strangford Lough, where they were found 

 by Prof. Dickie. They appear to be very closely allied to Hal. in- 

 crustans (Esper). 



H. hyndmani (Bowerbank). 

 Alebion hyndmani (Gray). , Proc. Zool. Soc. Lond. 1867, p. 534. 

 Pound by the late G. Hyndman in Strangford Lough. 



H. nigricans (Bowerbank). 

 Tophon nigricans (Gray). Proc. Zool. Soc. Lond. 1867, p. 534. 

 Strangford Lough (Prof. Dickie). 



H. farinaria (Bowerbank). 

 Belfast Bay, on Pecten opercularis (W. Thompson). 



* Ann. and Mag. Nat. Hist. 18, vol. iii., p. 332. 



