46 DREDGING REPORTS. 



species lately discovered by Mr. Norman in Shetland, and de- 

 scribed by him in the "Annals of Natural History" for January, 

 1864. It was found on the posterior end of a Bentalium entalis, 

 which appears to be its favourite habitat. A single specimen of 

 Halecium labrosum was also met with. This species, first de- 

 scribed by me from a specimen got on this coast, has since been 

 obtained by Mr. Peach at Wick. It is probably a northern form. 

 The delicate little Halecium tenellum, met with in the expedition 

 of 1862, did not occur in the later dredgings. Plumularia pin- 

 nata was very fine and abundant. 



A beautiful new Medusa, got in 1862, is described in the pre- 

 sent volume by Mr. Norman. 



Turning to the Polyzoa, we find Scrupocellaria Belilii recorded 

 for the first time as British in the dredging list for 1863. I had 

 observed it previously, and have since published a description of 

 it in the " Microscopical Journal" for April, 1864.^ Tubulipora 

 lobulata, Hippothoa divaricata, Membranipora imbellis, and Lepralia 

 annulata are likewise additions to our local Fauna; the latter a rare 

 and beautiful species. Bugula fastig lata, obtained sparingly in the 

 first expedition, was found to be more plentiful in the last. B. 

 Murray ana was also plentiful. These are the most characteristic 

 northern forms of the genus. A specimen of what appears to be 

 a variety of Escliara SIcenei, got in the last dredgings, is much 

 more broadly foliaceous than is usual in that species, and nay 

 possibly be the Escliara cribraria of Johnston. This latter is still 

 involved in some obscurity ; but broadly expanded specimens 

 which I have obtained from the deep-water boats on this coast, 

 in a similar worn state to Dr. Johnston's type in the British 

 Museum, favour the supposition of its being a variety of E. SIcenei. 

 The Cellepora dichotoma, lately described by Mr. Hincks, proves 

 to be equally common on our coast with C. ramulosa, with which 

 it had formerly been confounded. The same may be said of C. 

 avicularis, Hincks, as compared with C. pumicosa. A single 

 example of Cellepora Hassallii was got encrusting the stem of Plu- 

 mularia falcata: this has usually been considered a littoral species. 



* See also page 63 of this volume. 



