Miscellaneous. 471 



old naturalist there, Laughrin, and I also have a mounting of 

 spicules from Belfast corresponding exactly with A. 



It is possible that C. Lacazei, Herouard, is also a synonym of 

 C. Montaijui ; but this could only be the ca^o by supposing that the 

 author has mistaken the position of some of the spicules, and that 

 ■i, 12, and 13 belong to the summit of the pedicel, as G and 7 do 

 to its sides, and 1-i to the centre of the termination. 



The specimens 13 and C, in which I have failed to find the upper 

 dermal bell-shaped spicules, were obtained at the same time and 

 preserved in the same way, in spirits only, as A. I have often 

 failed to find the small upper spicules of other Cucumarians where 

 they ought to have been. How does this happen ? Is it that these 

 are the last developed spicules and only occur in adult individuals ? 



Cucinnana KoelliJceri, Semper. 



Samper's work is not in my library ; Ludvig's reference to it is 

 * Reise im Arch, der Philippiuen-Holothurien,' pp. 237, 271, 

 pi. xxxix. fig. 17. 1 have, however, many specimens of this species 

 received at difi^erent times from the Zoological Station at Naples. 

 The examination of the calcareous deposits in two specimens gives 

 the following results : — 



Body-spicule with 3, 4, and up to 8 foramina, but by far the 

 largest number with 4, the others being exceptional. The four- 

 holed spicule differs, however, from that of C. Montagui (specimens 

 A, B, C) in being shorter in proportion to the length. Moreover, 

 these spicules are not only highly nodulous, but the nodules at their 

 summits split, as it were, into little riblets, which riblets ultimately 

 become minutely spinous. This is a peculiarity which I do not 

 remember to have observed in any other spicule of this genus. In 

 the second specimen the body-spicule agrees in character with the 

 last, but those with many foramina are much more numerous, 8 

 being here very common, and ranging thence up to 18 ; there is the 

 same tendency of the nodules to break out into spine-points, but 

 less commonly and markedly than in the first specimen. 



Upper Bociy-spicuhs. — In the first I perhaps see two or three, 

 but am unable to make them out satisfactorily ; in the second I 

 cannot find any. 



Pedicel-spncules. — The lateral spicules in character like to those of 

 British C. Montagui, but more generally dilated centrally and iu 

 that jiart with the foramina in double line. The spicula of the 

 summit also and those of the tentacles do not exhibit any marked 

 divergence from those of C. Montagui, but the larger of the last 

 more generally with a double row of foramina, at least in their 

 central portion. 



I think it is evident that these Naples sjiecimens have been killed 

 with acid, as in the tirst-mentiuned not a single spicule is to be seen 

 in the tentacles, and in the others ordy the larger forms. This may 

 account for the absence of the second form of body-spicules. 



