96 . STYLARIOIDES GLAUCA. 



De St. Joseph (1894) observes that this species is rare at Dinard, but careful search 

 in fissures of rocks between tide-marks might lead to further captures. 



Fauvel (1907) includes Hansen's arctica, borealis, and rugosa under this form. 



2. Stylarioides glauca, Mahngren, 1867. Plate XCVI, fig. 2 ; Plate CIV, fig. 9— bristle. 



Specific Characters. — Body somewhat clavate in outline, 1 to 1^ in. in length, 

 slightly tapered anteriorly and much more so posteriorly, with clearly differentiated 

 segments, the posterior region sometimes forming a narrow, moniliform appendage of 

 many segments. General surface comparatively smooth under a lens, though studded 

 with long clavate papillas, and encrusted with minute particles of sand which give a dull 

 greyish appearance in life and in a state of preservation, with a dull bluish region from 

 the intestine. Body-w^all thinner than in S. plumosa, and the fascicles of dorsal and 

 ventral longitudinal muscles are visible as separate strands. Palpi flattened and crenate. 

 Six branchial processes, the two lower with filiform tips and no pale streak in the centre. 

 Two minute brown pigment-specks on the process bearing branchiae, palpi and mouth. 

 Frontal bristles (first series only) translucent, pale, iridescent and few in number in 

 contrast with S. plum&sa, boldly articulated. Second series inaugurate the arrangement 

 throughout the rest of the body, viz. a longer dorsal tuft of articulated bristles and 

 ventrally a shorter yet conspicuous tuft proportionally thicker, also with well-marked 

 articulations and a tapered and slightly hooked tip. 



Synonyms. 



1867. Trophonia glauca, Malmgren. Annul. Polychset., p. 82, Tab. xiii, fig. 78. 



1869. „ „ Mcintosh. Trans. Koy. Soc. Edmb., vol. xxv, p. 419, pi. xv ; fig. 13 b. 



1873. „ „ Sars. Bidrag Christ. Fauna, No. 3, p. 48. 



1875. „ „ Ehlers. Zeitschr. f. wiss. Zool., Bd. xxv, p. 24. 



1877. ; , „ Grube. Abh. Schles. Gesellsch. Nat. (1876), p. 49. 



1879. „ „ Tauber. Annul. Danica, p. 112. 



1881. „ „ Leslie and Herdman. Proc. Koy. Phys. Soc. Edinb., vol. vi, p. 66. 



1883. „ „ Levinsen. Vidensk. Medell. Foren. Kjobenh., p. 122. 



1894. ; , „ Bidenkap. Christ. Yet.-Akad. Forliandl., p. 104. 



1897. Stylarioides glancus, Michaelsen. Polych. deutsch. Meere, p. 158. 



1900. Trophonia glauca, Newbigin. Millport Communic, i, p. 5. 



1907. Stylarioides glauca, Fauvel. Bull. Inst. Ocean., No. 107, p. 21. 



1908. ., „ Mcintosh. Ann. Nat. Hist., ser. 8, vol. ii, pp. 530 and 541. 

 1910. „ glaucus, Southern. Proc. P. Irish Acad., vol. xxviii, p. 240. 

 1914. „ „ Idem. Ibid., vol. xxxi, pt. 47, p. 137. 



Habitat. — Dredged in considerable numbers in St. Magnus Bay in 100 fathoms; 

 Outer Haaf, Skerries, in 70—80 fathoms; off the Hebrides (1866), and also off Inverary 

 (J. G. Jeffreys) ; 50 fathoms in Dingle Bay (J. Gr. J.) ; 18 fathoms south of Bressey Sound 

 (W. C. M.) ; Hillswick Harbour in a sponge at low water (J. Gr. J.) ; off St. Abbs' 

 Head (Leslie and Herdman) ; off Bailey Light, Dublin Bay, and Clare Island (Southern) ; 

 S.W. Ireland, Stat. II, 110—120 fathoms; Bantry Bay; and Kenmare (R. I. A.). In 

 the ' Porcupine' Expedition of 1869, and in that of 1870, at 358 fathoms, on sand, Lat. 



