334 MAEINE INVERTEBRATE FAUNA OF PLYMOUTH. 



beautiful calcareous sponge^ was dredged* in 25 fms. on September 

 14th, attached by its slender stalk to an old egg-case of Scyllium 

 eanicula, which was itself adhering to the stem of a Gorgonia. 



Hydeozoa. — A colony of Norman's Tuhiclava {Merona) cornucopise, 

 consisting of from 90 to 100 polyps, was dredged in 15 fms. water 

 on June 10th. The colony covers almost the whole of the upper side 

 of the shell of an Aporrhais, tenanted by a Phascolion strombi. 

 Several interesting points, in which I have been able to supplement 

 Dr. Norman's original description, will be found described in a paper 

 contributed by me to the Transactions of the Devonshire Association 

 for the present year. The original specimens of T. cornucopia were 

 dredged thirty years ago among the Shetlands, in from 80 to 100 

 fathoms of water. 



Several additional colonies of Haloikema Lanliesterii (G. C. 

 Bourne) have been dredged, but the description of these is for the 

 present deferred. 



ScYPHOZOA. — In a little creek beyond the breakwater Haliclystus 

 octoradiatus ( = Lucernaria auricula) has been discovered in 

 hundreds, attached to Ceramium and Enter omorpha, between tide- 

 marks. The early part of the spring would be the time at which 

 the development of this form could be followed out. 



Anthozoa. — The Actinians of Plymouth present a valuable field for 

 special investigation. On June 28th a specimen of one of the varieties 

 of Eloactis Mazeli (Jourd.) was trawled by us a few miles off the 

 Mewstone, and furnishes an interesting addition to the British fauna. 

 It has been fully described in my paper read to the Devonshire 

 Association last July. 



Actinia equina, Anemonia sulcata, Gereus pedunculatus [8. hellis) , 

 Thoe sphyrodeta, Gylista undata {S. troglodytes), Urticina felina (T. 

 crassicornis) , and Corynactis viridis are all common at Plymouth. 

 Gylista viduata is rare within the Sound, although common enough 

 in the neighbourhood. Bunodes coronata and Ballii both occur, the 

 former in Whitsand Bay, the latter on the breakwater. Of Bunodes 

 Ballii, the typical pink-spotted variety, which is very common 

 on the shores of the Isle of Wight, is rare here, and is replaced by 

 the varieties dealhata and livida of Gosse. In addition to the above, 

 several interesting forms that appear to be undescribed are quite 

 common in certain localities. 



TuRBELLARiA. — Mr. Gamble's researches during the present summer 

 have revealed the existence of a Rhabdoceele fauna unparalleled in 

 the number of its species, and upon which we may expect a special 

 report in an early number of the Journal. 



Nemertea. — For a similar reason there is no need that anything 

 * Two additional specimens have since been taken. 



