32 Prof. M‘Intosh’s Notes from the 
Grube, though the latter conclusion is unlikely. The body 
is 2-2-5 mm. long, of an orange colour; thoracic seg- 
ments 8; dorsal bristles of two kinds ; uncini pectiniform ; 
tube sinuous and calcareous, incrusting Zostera and other 
marine structures. There is no diagnostic feature in this 
description. 
S. edificatrix. Body dull orange, 2-25 mm. long, seg- 
ments 45-50 ; branchiz 4, white, with pale granular tubercles 
externally ; no eyes; thoracic segments 9; collar-bristles 
geniculate, cuspidate at the base of the wings ; rest of the 
segments have subulate bristles with wings, others pectinate ; 
falciform ; hooks small, multidentate ; tube capillary, densely 
glomerate, and intricate. 
Cunningham and Ramage * (1887), while giving no details, 
have a figure of an adult example and a larva of Filograna 
implexa. The adult has eight pairs of anterior bristles, a 
pair of eyes, and opercula on the branchiz. The larva has 
three pairs of bristles, two large eyes, and a prominent 
prototroch. 
Ehlers + (1887) examined a form from the Tortugas 
which he named Filigrana hualeyi; having the general 
structure described by previous authors, with ova in the 
posterior segments (12-20), and in the case of a nurse-stock, 
from the seventh posterior segment of which a bud of six 
thoracic and seven abdominal segments arose, there were 
no reproductive elements. Hach branchial filament, as in 
Filograna dysteri, ends in a pear-shaped, cellular, flattened 
swelling with palpocils. He considers such an organ may 
be connected with food-supply, since he found a Nauplius 
amongst the pinne. The stomachs, however, of most 
examined in Britain had only such objects as currents 
supplied, and in those from deep water Coccoliths were 
common, and so with many foreign forms. Ehlers states 
that Huxley describes certain warts on the branchiz of his 
species, but they were not present in the American form. 
The homologies of the terminal enlargements with opercula 
or eyes (e. g. in Branchiomma), as Langerhans considered in 
Salmacina incrustans, are referred to. Ehlers gives a figure 
of the characteristic collar-bristles which differs from any- 
thing hitherto seen in the group, in so far as it has only 
six large serrations to the basal division of the wing, no 
hiatus, and a long, smooth, tapering tip, Further, no bristle 
* Trans. Roy. Soc. Edin. vol. xxxiii. p. 673, pl. xlv. fig. 35. 
+ “Report on the Annelids of the ‘ Blake,” p, 314, Taf. 56, figs, 4-9, 
boiehy 
a 
