^i4Q Mr. J. Alder on new B?'iiish Zoophytes. 



As the polype of this species has not been observed, its claim 

 to a place in this genus cannot be fixed very decidedly. Its 

 mode of branching is similar to that of the other Tubularia, but it 

 is much smaller than any species hitherto described. The divi- 

 sion of the tube into two coats is curious. This takes place 

 sometimes near the base, but more frequently in the young 

 branches, where the thin, smooth epidermis shows a strongly 

 ringed tube within. The epidermis in dried specimens shrinks 

 to the form of the inner tube, so as not to be distinguished 

 from it. 



Family Campanulariadse. 



Laomedea neglecta, n. sp. PI. XVI. figs. I, 2. 



Polypary minute ; . stem filiform, subflexuose, with two or three 

 alternate simple branches, each bearing a cell; the stem is 

 annulated with from four to seven rings above the origin of 

 each branch, and sometimes slightly ringed below it; the 

 branches are ringed throughout : cells narrow and deep, with 

 alternately shallow and deep crenations, forming about eight 

 bimucronated denticles round the margin. Polype with fifteen 

 Or sixteen slender tentacles.. 



Height /^ in. 



On the under side of stones between tide-marks, Cullercoats 

 and Tynemouth : frequent. 



*^': This delicate little Laomedea, though apparently not rare, has 

 "hitherto escaped observation ; or, if observed, it has been passed 

 over as the young of Johnston^s small variety of L. gelatinosa 

 [L. fleccuosa, Hincks, MS.), with which it is sometimes associated 

 on the same stone. It is, however, not very readily seen unless 

 the stone is examined with a magnifier. It diflfers from the 

 species above named in being of much humbler growth, more 

 slender, and in having smaller, narrower, and deeper cells, cre- 

 nulated on the margin. The margin of the other is plain. The 

 erenulatians are very difficult to detect, on account of the extreme 

 tenuity of the edges. They resemble those of the true Sertu- 

 laria gelatinosa of Pallas [Laomedea gelatinosa, var. /3, Johnst.), 

 though the shape of the cell is different, as may be seen by a 

 reference to fig. 3, where a cell of that species is figured for 

 comparison. I have also added two cells of L. longissima, Pallas 

 {L. dichotoma, /3, Johnst.), fig. 4, the only other British denti- 

 culated Laomedea with a campanulated cell. These two species 

 were supposed to have plain margins by Dr. Johnston, who had 

 not seen them in a perfect state. 



