472 Miscellaneous. 
Observations. 
It is most likely that when Dr. Marenzeller speaks of C. Mon- 
tagui as a distinct British species he does so on the authority of 
specimens which I sent to the Vienna Museum in 1886 as “ Cucu- 
maria Montagui, Fleming, Polperro.” The specimens sent were 
taken from the same bottle as those here described, but were pro- 
bably smaller than A and B (which are the largest I have) but 
larger than C, 
Now the curious circumstance is that C. Montagu seems unques- 
tionably synonymous with C. Lefevrii, Th. Barrois, and Semperia 
Drummondii, Hérouard ; Marenzeller assigns these names as 
synonyms of C, Koellikeri, while he keeps C. Montagui as a 
distinct species from C. Koellikeri, and refers to Colochirus Lacazet, 
Heérouard, as a synonym. This last I cannot thus recognize 
as a synonym of C. Montagui unless I am allowed to suppose 
that Hérouard has mistaken the position of some of the spicules 
which he figures; moreover, figs. 8 and 18 would be wanting in 
accuracy, but fig. 11 accurately represents the form and mode ot 
growth of the very minute spicules which I have mentioned as 
investing the extremities of the tentacles of the specimen C of 
C. Montagu. 
An interesting point has come out in this investigation. It isa 
circumstance quite new to me that in two specimens of the same 
species the mode of growth in a spicule should proceed on two 
entirely different plans. In OC. Montagui (B) I have described the 
two additional foramina made to the original four-holed spicule as 
almost always being added to the extremities of the spicule ; while in 
C. Lefevrvi, Th. Barrois (presumably the same species), the drawings 
show the additional foramina as being added on laterally. In the 
Naples C. Koellikert the additions to the original spicule appear 
always to take place laterally (that is, out of the central line), even 
if added at the extremities it is at the side of the extremity and not 
apically. In this respect there is agreement with C. Lefevri. 
LThyone Portlockii, Forbes. 
I believe this species to be another synonym of C. Montagui, for 
the following reasons :—In 1864 or 1865 I wrote to Belfast, pro- 
bably—but my memory fails me—to Professor Wyville Thomson, 
to endeavour to clear up the question what Holothuria Drummondia, 
Thompson, and Thyone Portlockii, Forbes, were. As wellas I recol- 
lect, I learnt that the former was not to be found in the Belfast 
Museum; but a piece of the skin of the latter was sent to me. 
Among my collection of Holothuroidean spicules at the present 
moment is a mounting thus labelled: ‘* Cucumaria Montagui, 
Fleming, Belfast Museum.” Unfortunately there is no further 
information; but I suspect that a re-examination of the specimen 
