Mr. A. H. Hassall on Marine Zoophytes. Ill 



prawns are taken only during the first quarter of flood-tide, and 

 then plentifully : at the South Islands of Arran he captured numbers 

 of them in the summer of 1835, and out of about fifty, found three 

 with Bopyri attached. — See 'Annals,' vol. v. p. 256. 



Palcemon squilla, Leach, Mai. pi. 43. f. 11-13; Edw. Crust, t. ii. 

 p. 390. 



Templeton notices this species as " common on the shore of Belfast 

 lough." It is of frequent occurrence in rock-pools throughout the 

 range of the Down coast, and is likewise occasionally taken in deep 

 water with the dredge. 



I have met with it commonly in rock-pools about Ballantrae, Ayr- 

 shire. 



Palcemon varians, Leach, Mai. pi. 43. f. 14-16 ; Edw. Crust, t. ii. p. 391. 

 A few examples have been procured in Belfast and Strangford 

 loughs by Dr. Drummond and myself. Leach remarks that the 

 Astacus squilla of Pennant may be his P. varians. 



" Palcemon Leachii " 



Is the name attached by Mr. J. V. Thompson to an Irish specimen 



in his collection. 



Pasiphae Sivado, Risso, Hist. Nat. l'Eur. Merid. t. v. p. 81, ed. 1826; 

 Edw. Crust, t. ii. p. 426. 

 " In the British Museum there is a specimen so named, and labelled 

 ' Ireland.' From the donor, the Rev. James Bulwer, I learned that 

 it was taken by him in the vicinity of Dublin." — W. T. in ' Annals/ 

 vol. v. p. 256. 



[To be continued.] 



XVIII. — Remarks on three species of Marine Zoophytes. 

 By Arthur Hill Hassall, Esq. 



Antennularia arborescens. Polypidom arborescent, arising from a 

 tangled mass of tubular root-like filaments by a single trunk, which 

 subsequently divides and subdivides into numerous branches; branch- 

 lets verticillate, long ; cells tubular, not separated from each other 

 by one or more small cup-like processes, as are those of Antennularia 

 antennina. 



In the ■ Annals and Magazine of Natural History/ vol. vi. p. 168, 

 pi. 5, I have described and figured an Antennularia which I con- 

 ceived to be distinct from the common A. antennina, and which I 

 then conjectured to be identical with the Antennularia ramosa of 

 Lamarck. 



The opinion originally entertained of its specific distinctness has 

 recently been confirmed by some observations of Mr. J. Macgillivray, 

 recorded in the ninth vol. of the * Annals,' by whom many specimens 

 have been found at Aberdeen, agreeing in all respects with my de- 

 scription ; but I have since seen reason to discard the notion of its 

 identity with Lamarck's Antennularia ramosa, whose description of 



