POLYPODA. 431 



Montagu are different, it is thought proper to notice both here. The fol- 

 lowing synonyms relate to the latter species. 



S. intricata, Linn. ; »S'. rennicidaris, Midi., Zool. Dan., vol. iii. p. 9, 

 t. 86, f. 9 (animal) ; Mont. Test. Brit., p. 509. -S'. 3Iu/h'ri, Berkeley, 

 Mag. Nat. Hist., vol. vii. p. 421, Dr. J. .S'. vermicalaris, Mont., is no- 

 ticed in Capt. Brown's Irish Testacea as found on the Dublin coast and 

 in Lough Strangford. 



S. serrulata, Flem. 



In a letter from Mr. John Humphreys of Cork, this species is mention- 

 ed under the latter name as " detected by G. B, Sowerby on Pinnce sent 

 him from Cork Harbour." 



S. vitrea, Fabr. ? 



Adherent to a stone brought up from deep water, on which were also 

 Crcnu'n 2)erso7iafa and CaryojjhylUa Smithii : Youghal, Dr. R. Ball.* Along 

 with the last on a stone capped by broken CeUtjiora cerviconiis di'edged 

 from 40 fathoms, off \ATiitehead, Feb., 1848. 



S. triquetra, Linn. 



July loth, 1848. — On looking to many of these living near low-water- 

 mark, at Cultra, Co. Down, I was much struck in every instance with the 

 pure white colour of the recently-formed portion as contrasted with the 

 brown colour of the older. It suggested two queries to me : 1st, Is the 

 pure white portion the work of this summer, the brown that of last sum- 

 mer, which had become discoloured during winter, and consequently does 

 the animal not increase its testaceous tube under certain temjierature ? 

 All the white portion is so pure in colour that it must necessarily be the 

 work of the present season. Taking this for granted, we can, 2ndly, tell 

 the rate of progress that the species makes in shell-building. 



Genus Filograna. 



F. implexa, Berk. 



Belfast Bay, on tangle roots and covering the limpets which burrow in 

 them, W. T. Clifden, Dr. Farran. 



Getms DiTRUPA. 

 D. suhiilnfa, Berkeley. 

 The only part of the coast on which this interesting species has hither- 

 to been noticed being the North-West (Zool. Jour., vol. v. p. 424), it may 

 here be mentioned that specimens dredged by Mr. M'Andrew from forty 

 fathoms, and still deeper water off the Old Head of Kinsale and Cape 

 Clear, have been kindly given to me by that gentleman, as have others by 

 Mr. Stutchbury (the able Curator of tlie Bristol Institution), dredged from 

 ninety-three fathoms, at a distance of ninety miles (English) due South of 

 the last-named locality. Mr. M'Andrew considers this " an abundant 

 deep-water species," and has " obtained it off Scilly in forty-five fathoms ; 



* Vennilia armata, Flem. Edin. Phil. Journ., vol. xii. p. 243 : Strangford 

 Lough, W. T., — Serpula confortus, Brown's MSS. Illus., pi. 2 : Dublin coast, 

 Mr. Warren, — are brought by Dr. Johnston under Serpula triquetra, Linn. 



