PIXELL—POLYCHATA OF THE INDIAN OCEAN 7 
having enlarged extremities ; central crown has six small spines and a very large one with 
a lateral hook on either side of the strong curved terminal spine. 
Localities. Three specimens about 15 mm. long from the bottom of SS. Juba off 
Zanzibar; one much larger specimen (54 mm. long and 3 mm. maximum width) from 
Suakin, Red Sea. 
The tubes are thick and more or less curved, with longitudinal and transverse ridges 
and entire margins to apertures. The functional operculum with its pedicle is 4—8 mm. 
long. It is quite asymmetrical, the large spine arises from the dorsal side and often lies 
almost flat over the rest of it. This seems to be the chief point of difference from 
H, minax, Grube, which has a symmetrically placed central crown. 
The large spine with its strong terminal and pair of lateral hooks varies much in 
length sometimes being as long as 3 mm. and thus able to extend some distance beyond 
the ventral boundary of the lower funnel when lying closely over it, a position in which it 
is often found. The edge of the lower funnel is produced into 16 or 17 processes with 
terminal enlargements, the funnel is asymmetrical the radii being much larger on the 
ventral than on the dorsal side. 
The rudimentary operculum on the opposite side of the body is club-shaped. 
The branchize (15—-20 pairs) are of a brownish colour banded with white. There is 
a short interbranchial membrane, and the numerous rather small pinnze extend nearly to 
the end leaving only a very short terminal filament. 
The setze and uncini agree with those figured by Gravier (21). 
7. Eupomatus exaltatus, Marenz. (83) 1885; Willey (50) 1905 (Plate 8, fig. 4). 
Specific characteristics: the inner funnel of the operculum is raised on a short 
column and has eight or nine strong hook-like spines, without secondary processes except at 
base ; the dorsal one is twice as large as the others and bends suddenly at a right angle 
over the top of them (fig. 4). 
Localities. Two specimens from Wasin Channel, 7—10 fathoms; one from the 
bottom of SS. Juba, Zanzibar, and one (operculum only) from Dongonab Harbour, Red 
Sea. 
Tubes round and almost smooth, being only slightly marked with growth lines and 
three low dorsal ridges. Large operculum on very long pedicle projecting some distance 
beyond gills when these are expanded. 
Body of a dull green colour, branchize 13—15 on each side, greyish violet colour with 
two clear broken black lines on the outer side of each ; terminal filament without pinnze 
“3 mm, only. 
After preservation the slightly larger specimen from Wasin has a total length of 
19mm., the operculum with its pedicle being 433mm. The abdomen consists of about 
90 segments, the terminal ones provided with long fine sete. 
The smaller specimen from Wasin has nine central spines to its operculum which 
occurs on the right side; that is, it is exactly the same as the one described by 
Marenzeller (83); the larger specimen, however, has its functional operculum on the left 
side, and it only has eight central spines as in Willey’s (50) specimen. The outer funnel of 
