I have united C. diversa Br. with Euc. spiralis (Blainv.). — Usually the shape of the colony 
is a sinistrorsal spiral with crowded coils of a diameter of some cm., but occasionnally with 
some irregularly curved or straight parts. The basal diameter diminishes, with a single exception, 
gradually towards the top. 1 he polyps are perforated by the spines, except when the polyps are 
of the larger type, another proof of the relatively slight generic value of Brook’s Aphanipathes- 
character. 1 he polyps especially are of a very divergent structure. The greater part of the 
specimens have a uniserial arrangement of the polyps so that I had considered them as Stic ho - 
pathes- species in the preliminary investigation; if there is a polyserial arrangement of the polyps, 
together with an uniserial arrangement on other parts of the same colony the specimen is proof 
i 
enough that we have an Eucirripathes- species in this case. The interpolypar distance also 
varies very much, from 0.75—2 mm. and even more, and there is no question about an error 
through the presence of young polyps. The polyps are principally of two types, one of which 
is represented by III (fig. 217) while the other is found with II and X (figs. 231, 232, 238). 
e t e & ulf be tv een these very divergent types is overbridged by specimen VIII, where 
both types are present on one and the same colony. The remarkable vertical stripes on the 
oral cone are only found in two specimens: II and X, while they are absent in VIII. 
I he reduction of the polyps, which occurs to a high degree in specimen V (fig. 222) is 
described by Brook for various genera. According to him it occurs in Eucirripathes principally 
in the basal part of the colony, so that here the polyps are only to be seen as flat disc-like 
swellings with a mouth. It seems that the tentacles disappear first; fig. 222 agrees with these 
observations, but as a rule the reduction does not occur in all species and individuals; several 
of the described colonies did not show a trace of it. 
1 he differences in structure of the polyps are too large to explain them solely by a 
different state of preservation, also since both forms are present on one and the same colony. 
I he microscopical research, which in this species was very much hindered by the spines, which 
lacerate the polyps, when they are loosened from the axis, gave some differences, i. a. with the 
specimens II and I\ ; but not great enough to be of specific value. For the present it will be 
bettei to keep them together, or, at the utmost, to divide Eucirripathes spiralis in a number 
ol varieties, so that III, IV, V and VI are grouped into a variety with small polyps (var. 
aphanipatho'ides ) while a variety with larger polyps and striped oral cone (var. striata) is formed 
with II and X, and a third variety (var. intermedia :), which is a transition between the other 
two, contains VII, VIII and IX. 
Specimen I is joined to Eucirr. spiralis because of its spines; but as long as the polyps 
aie unknown, there are not many arguments to be given in favour of this union. — Basing on 
the shape ol the colony and the spines, figured by Brook, I consider the Siboga-specimens as 
Eucirripathes spiralis. I he colony of the formerly described specimens is always a spiral with 
many coils, the diameter ol which is always a few (2—3) cm. only. This shape is figured very 
cleaily not only 7 by Esper, Blainville, Ellis, Solander a. o. but also by 7 Rumphius, who gives 
his specimen the name of Palrnijuncus angumus. It is true that Brook calls this specimen a 
flexuose, non-spiral species but it appears from this that Brook has not seen the figures in the 
Herb. Amb.; Brook s words only hold good for Palm, vulgaris and Palm, striatus but surely 7 
