AMPHITRITE GRCENLANDICA. Ill 



The Terebella gelatinosa of Keferstein 1 is probably an Amphitrite. 



Panceri 2 (1875) enters Amphitrite cirrata, O.F.M., as a distinct form from A. cirrata, 

 Savigny. 



Levinsen 3 (1877) describes and figures a remarkable crustacean parasite (Crypsi- 

 dromus terebellse) from the outer wall of the intestine of this species from Queensland. 

 The body of the female has the aspect of two wings, from the junction of which posteriorly 

 depend the egg-sacs, whilst at the opposite side is the mouth. 



2. Amphitrite grcenlandica, Malmgren, 1865. Plate CXIX, fig. 3— body; Plate 



CXXXVIII, figs. 6 and 6 a— hooks. 



Specific Characters. — Closely resembles Amphitrite cirrata in general structure, but 

 has slightly branched branchiae on a short stem, nineteen pairs of bristles and hooks, which 

 have a more erect character than in A. cirrata, and the slope made by the base more 

 nearly approaches a right angle, whilst ^ve or six teeth occur in lateral view above the 

 main fang. Ten ventral scutes. Segments ninety to one hundred. 



Synonyms. 

 1865. Amphitrite groenlandica, Malmgren. Nord. Hafs.- Annul., p. 366, Tab. xxi, fig. 52. 



idem. Annul. Polych., p. 107. 



Levinsen. Vid. Meddel. Forh. Copenhagen, p. 175. 

 Bidenkap. Yid.-selsk. Forh. Christ., p. 127. 



Wollebaek. Skrift. Selsk. Krist., 1911, No. 18, p. 102, pi. xxxv, fig. 4. 

 Meyer. Inaug. Dissert. Kiel, p. 36. 

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

 Hessle. Zool. Bidr. Uppsala, Bd. v, p. 181. 



Habitat. — Dredged in the " Porcupine " Expedition of 1869 in 164 fathoms on greyish 

 sand, stones and corals off Ireland, and in 808 fathoms on very soft, sticky mud off the 

 Irish coast in the same expedition ; in 690 fathoms in the Atlantic (No. 3) in the " Porcu- 

 pine " Expedition of 1870. 



Abroad it extends to Canada, Norway and Finmark. 



The body, which apparently ranges from 2 to 6 or 7 inches in length, is enlarged 

 anteriorly and tapered posteriorly, ending in a papillose terminal anus. The large 

 lower lip occupies the centre, behind which is a " segment " with a double ring, though 

 the posterior moiety is interrupted in the centre by a pair of small separate areas. 

 The next is the first ventral scute, which is short and supported on each side by a 

 cushion which extends to the mid-branchial region. This is followed by a narrow 

 though somewhat long scute. The next three are slightly broader (that is, antero- 

 posteriorly) and diminish a little in transverse diameter. Then follow four large and 

 broad scutes, behind which only a median trace is indicated and they disappear. There 

 are nineteen pairs of bristle-tufts, the first being opposite the last branchia, and placed 

 on low pads above the hook-rows. The two series of bristles, the longer and shorter, 



1 ' Zeitseh. f. wiss. Zool./ Bd. xii, p. 126, Tab. xi, figs. 19—22 (1862). 



2 ' Atti Soc. Ital. Sc. Nat./ vol. xviii, p. 231. 



3 ' Videnskab. Meddel. Naturhist. For. Kjobenhavn/ p. 25, Tab. vi, figs. 19, 20. 



1867. 



jy 3 



1883. 



)) ) 



1894. 



)} ) 



1912. 



a >, 



y> 



)> ) 



1915. 



}) j. 



1917. 



Neoamphitrite ,_ 



