126 Prof. M‘Intosh’s Notes from the 
times, though a definite name was not assigned to it. 
Amongst others, Seba * (1758), in alluding to various marine 
“mosses, corallines,” and tubular corallines, Congeries 
minutorum tubulorum, which he figures in his ‘ Thesaurus,’ 
specially refers to this form, which he found adherent to 
rocks and other structures, in one instance forming the basis 
to which Thuiaria thuja wasattached (fig.19 a). He figures 
correctly the spaces between the fascicles of tubes forming 
the mass. Though Plancus De conchis minus notis is 
quoted by some authors in this connection, nothing defi- 
nite can be found in his work. Linnzus, Risso, Pallas, 
and others placed it under the genus Serpula, whilst a few 
included it under Protula. Oken termed it Clymene filo- 
grana; Ray, Reticulatum trophaceum; Boece, Tubularia 
filograna. The form is interesting in some other respects 
than zoologically, since it occasionally blocks the pipes 
leading from the sea to the Marine Laboratory tanks, as at 
Port Erin f+. 
Berkeley (1827) clearly described the form with the 
opercula, which he dredged at Weymouth. In the ‘ Zoologi- 
cal Journal, Volume of Supplementary Plates’ (and not in 
vol. iii.) he gives a figure (pl. xviii. fig. 3) in which a 
somewhat pointed, hollow operculum is on each dorsal 
branchial filament. He shows seven pairs of thoracic bristles, 
and in the posterior (so-called abdominal) region is an indica- 
tion of a twist, or it may be a bud. 
Filograna impleva, as described by Sars {t (1846) in his 
first part of the ‘Fauna Littorales Norvegie,’ had six pairs 
of thoracic bristles in addition to the collar-bristles, two 
opercula on the dorsal branchiz (right and left fans), and 
two eyes. He gave no minute description of the “ vermi- 
dom ”’ and figured only a few of its tubes. 
Oscar Schmidt § (1848) alluded to Filograna implexa, and 
stated that he had found a new species at Faroé with buds at all 
stages. The same year he || described Filograna schleideni from 
the Faeroés, which he, as indicated, believed to be a new 
species, characterized by the absence of opercula and the 
arrangement of the eyes, which formed a row of four on 
each side of the middle line. He shows seven pairs of 
bristled feet in the anterior region, but does not differentiate 
tle collar-bristles or figure them, unless he intends the first 
* ‘Catalogue of the Curiosities in the Cabinet of Albertus Seba. 
+ I have to thank Mr. Chadwick for this information. 
{ Fauna Litt. Norveg. i. p. 86, Tab. 10, figs. 12-19. 
§ Frorieps Notizen, No. 148, p. 162, August. 
|| Neue Beitr. Naturgesch. Wiirmer, Jena, p. 33, Taf. iii. fig. 7. 
