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combination of these species, without having more extensive material, which might give 
transitions. Although Thomson’s & Simpson’s description of their Stichopathes ceylonensis is 
rather vague and especially the polypar data are far from characteristic, I have identified the 
Siboga-specimen with this species. The partly spiral stem, the blunt apex, the gradually 
diminishing diameter, the shape and the dimensions of the spines, their number of longitudinal 
rows is almost the same in both specimens. 
Diagnosis: 
Colony : gradually tapering, partly straight or curved, and partiy a 
sinistrorsal spiral, with a rather blunt apex. 
Spines: blunt, triangular, laterally compressed; 100 — 150 p. long; mutual 
distance 750—900 ij. ; 3—4 longitudinal rows. Smooth surface; distal side at 
right angles with the axis. 
Polyps: interpolypar distance 2 mm.; sagittal tentacles 1.5 mm., lateral 
ones subequal: 1 mm. Sagittally elongated, oval, domeshaped oral cone 
with sagittally elongated mouth. 
2 nd Subgenus Eucirripatkes n. n. 
CRITICAL REVIEW OF THE KNOWN SPECIES. 
The number of species, appertaining with certainty to Cirripathes Br. was not very 
large, before the publication of my “Bijdragen tot de kennis van het genus Cirripathes ’, while 
there were a number of species besides, which for more or less valid reasons were joined to the 
same genus, although their polyps were unknown. The following list gives a review of these 
species, together with a short diagnosis: 
Cirripathes propinqu,a Brook. Colony: straight or curved, but not into a spiral; subequal 
diameter (according to Dana: with nodes in the axis); Spines: short, thick, conical, at right 
angles with the axis, different in length on opposite sides of the axis; 14 — 16 irregular 
longitudinal rows; Polyps: dark, rounded, prominent, diameter 1.5 mm., 5 polyps to 1 cm., 
1.7 mm. high; high oral cone with basal constriction; mouth with 10 folds; tentacles short 
and thick, lying around the mouth; polyps placed in a steep spiral. 
Cirripathes angtdna Dana. Colony: straight or curved or twisted; distinct nodes in the 
axis; Spines: conical, crowded, distally inclined, subequal in length at every side of the axis; 
irregularly distributed, sometimes in verticils (acc. to Cooper: 6—7 longitudinal rows, spirally 
round the axis); Polyps (dried): ± 4 to 1 cm.; no oral cone; (acc. to Cooper: in irregular 
spirals around the axis). 
Cirripathes spiralis (Linn.) Blainv. non Pourtales. Colony: rather regular dextrorsal 
spiral ; Spines : conical, shorter on the inside of the spiral-coils, distributed in sinistrorsal spirals ; 
Polyps (dried): no details are known. 
Cirripathes gardineri Forster-Cooper. Colony: sinuous with rough annular joints at 
rare intervals; Spines: irregularly distributed, blunt, conical with here and there a tendency to 
be knobbed at the end; a few, exceedingly small, triangular secondary spines are scattered 
