76 REPORT— 1866. 



witli sand particles and mud attached. "Witin this test lies a series of interlaced 

 muscular fibres, which cross each other at right angles, and which muscular coat 

 can be readily separated from the internal (and somewhat fibrous) surface of the 

 test. The branchial sac is elongated, has its meshes of a square or slightly oblong 

 form, ciliated at the edges, and is continued along the narrow part of the animal 

 to the terminal apertures, the oral one of which has no tentacular fringes. Its 

 structure, so far as the specimen was preserved, was detailed, and it was mentioned 

 that its digestive system agreed in general with Pelonaia. In conclusion, the 

 species differs from Pelneaia, as described by Forbes and Goodsir, in the extreme 

 production of the portion sustaining the apertures ; and in the structure of the 

 test, which in P. glabra is thin and diaphanous, like parchment, and in P. corrit- 

 gata thick, cartilaginous and transversely wrinkled, while here it is like sand- 

 paper. The shelf or transverse ridge in the interior of the mantle, as shown in the 

 figure of P. glabra, is absent. It differs also very characteristically from the Bol- 

 tenia. — The same author communicated some remarks on the Tiirbellaria and 

 Annelida of North Uist, of which he had found about 110 species, including many 

 rare and some new examples. He also exhibited numerous coloured drawings of 

 new and rare marine animals recently got in the Hebrides and St. Andrews Bay. 



On a Bare Molluseoid Animal (Pelonaia corrugata). 

 By W. C. M'Intosh, M.D., F.L.S. 



This was at first considered to be a new species, from the erroneous or imperfect 

 descriptions previously published, especially tliat in the ' British Mollusca ' of 

 Messrs. Forbes and Hanley. A minute description was given of its appearance 

 and anatomy ; — its unyielding flask-shaped sheath of sand particles, covered with 

 sandy hairs towards its bulbous portion, and to which sheath the muscular coat 

 does not adhere closely ; its elongated branchial cavity, curious digestive system, &c. 



Large coloured drawings of new and rare marine animals from the East and 

 West coasts of Scotland were also exhibited. 



List of TurheUaria and Annelida of North Uist. 

 By W. C. M'Intosh, M.D., F.L.S. 



The list of Annelida from North Uist consists of about 110 species, some of 

 which have hitherto been procured only at rare intervals, either in Britain or on 

 the Continent, while others are new to science. Amongst the rarer forms may be 

 noticed Lineiis albus, Stylus fasciatus, Serpentaria fragilis, Polynoe scolopendrina, 

 Lepidonotus clava, Spinther oniscoides, Gatfiola spectaoilis, Uteone jntsilla, Scalibregmu 

 injlatum, Ophelia acumitiafa, Travisia Forbesii, Terebella macidata, Tcrebellidcs 

 stra7nii, &c. The rare or new forms come under the genera Lcptoplana, Borlasia, 

 Ominatoplea, Lepidonotus, Lumbrincrcis, Ncrine, Trop)honia, Phyllodoce, Clytnene, 

 Terebella, Apihlebina, and Dendrostomu?n, 



Attention was called to the fact that every specimen of Polynoe scolopiendrina 

 was found in the tube of a littoral Terebella. This habit of frequenting the tubes 

 of other annelids is not imcommon in its allies. The P. scolope7idrina was also 

 phosphorescent. 



The author mentioned that Mr. Gwyn Jeffreys, F.E.S. had just placed in his 

 hands a large collection of deep-water forms from the Hebrides, so that a con- 

 siderable addition to the foregoing list might be expected. 



On the Zones of the Coniferce from the Mediterranean to the Crest of the 

 Maritime Aljis. By "VV. Moggbidge, 



On the Occurrence of Lemna arrhiza in Epping Forest. By "W. Moggeidge. 



On the Food and Economical Value of British Butterjiies and Moths, 

 By 0. Gkoom-Napieb. 



