AMPHITR1TE SCYLLA. 



123 



Synonyms. 



1820. 

 1826. 

 1828. 

 1836- 

 1843- 

 1851. 

 1860. 

 1862. 

 1865, 



}> 

 1868 



1875, 



1884, 



1885, 

 1893, 

 1894, 

 1897, 

 1900, 

 1901, 

 1904 

 1906, 

 1909 

 1914 

 1915 



1917 



Terebella scylla, Savigny. Syst. Annel., p. 87. 



„ variabilis, Risso. Hist. nat. L' Europe Merid., vol. iv, p. 408. 

 „ scylla, De Blainville. Diet. Sc. nat., t. lvii, p. 438. 

 -49. „ variabilis, Cuvier. Reg. An., Illust. Edit., p. 25. 

 -53. „ „ Ohenu. Illust. Conch., ll e livr., pi. iv, fig. 6. 



„ scylla, Grube. Fam. Annel., pp. 80 and 138. 

 „ gracilis, idem. Arch. f. Naturges., Bd. xxvi, p. 99. 



„ gelatinosa, Keferstein. Zeitschr. f. w. Zool., Bd. xii, p. 126, Taf. xi, figs. 19 — 22. 

 Physelia scylla, De Quatrefages. Annel., torn, ii, p. 369. 



„ gracilis, idem. Ibid., p. 372. 

 ?. Terebella Isevirostris , Claparede. Annel. Nap., p. 139, pi. xi, fig. 5. 

 Nicolea gelatinosa, Grube. Abh. Schles. G-es., 1868 — 69, p. 128. 

 Terebella Isevirostris, Panceri. Atti Soc. Ital., vol. xviii, p. 530. 



Amphitrite gracilis, Marenzeller. Sitzb. der K. Akad. wissensch. Wien, sep. abdr., p. 26, 



Taf. i, fig. 3. 

 „ Carus. Fauna Medit., i, p. 262. 

 variabilis, Lo Bianco. Atti R. Accad. Sc. Napoli, vol. v, No. 1 1, p. 50. 

 gracilis, De St. Joseph. Ann. Sc. nat., 7 e ser., t. xvii, p. 198, pi. viii, fig. 234. 



„ Michaelsen. Polych. deutsch. Meere., p. 168. 

 variabilis, Ehlers. Magell. Annel., p. 15. 



idem. Polych. Magell. u. Chil., p. 208. 

 gracilis, Journ. M. B. A, vol. vii, p. 228. 



„ Bonn. Ann. Sc. nat., 9 e ser., t. iii, p. 121 (movements). 

 variabilis, Lo Bianco. Mitt. Zool. St. Neap., Bd. xix, p. 576. 

 gracilis, Southern. Proc. Roy. Irish Acad., vol. xxxi, No. 47, p. 122. 

 „ Mcintosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 9. 

 „ Allen. Journ. M. B. A., vol. x, p. 633. 

 „ Southern. Irish Sc. Invest., No. 3, p. 46. 

 „ Rioja. Anel. Poliq. Cantab., p. 49. 

 „ Hessle. Zool. Bidr. Uppsala, Bd. v, p. 190. 



Habitat. — Abundant in fissures of the gneiss rocks amongst sandy mud and gravel 

 at St. Peter Port, Guernsey, and also between tide-marks in Herm. Polperro, Cornwall 

 (Dr. Baird) ; Southport (Dr. Oarrington) ; several examples in the Collection of the 

 British Museum unnamed; Falmouth; Plymouth (Allen); Blacksod Bay (Southern). 



Abroad it is found in the Red Sea (Savigny) ; Sicily (Grube, V. Carus) ; shores o£ 

 France (De Quatrefages, Keferstein, De St. Joseph); Mediterranean and Adriatic 

 (Claparede, Von Marenzeller) ; Cantabria (Rioja). 



The dorsal cephalic collar, in this really the border of the cephalic plate, forms 

 a small crenated rim posteriorly, and passes downward at each side to join the lower 

 edge of the supra-oral arch. The tentacles which take origin from the plate are 

 numerous and have the typical grooved structure. They are of a pale cream colour 

 and partly translucent. Its front edge terminates in a prominent spout-shaped arch 

 over the mouth, the sides inferiorly sloping obliquely to their attachment. The lower 

 lip is formed by a transverse fold, and within it is a small tongue-like fold or 



