328 Miscellaneous. 
rufescens and Ohiridota Pisanii*) the genital canals themselves 
become receptacles for the brood, and the entire development is 
passed through within them. ‘The oldest stages of the young, 
which throng the genital canals in large numbers, are 3 millim. in 
length and are born through the genital aperture. They possess 
seven tentacles, exhibiting the same symmetrical arrangement as 
in the case of the young of Chiridota rotifera previously described 
by me. In their body-wall the wheel-papillz 7 and the hook-shaped 
calcareous bodies, which are especially characteristic of the species 
and to the function of which Ostergren ¢ has recently directed 
attention, are already well-developed; similarly the tentacles also 
are already provided with the same calcareous bodies as in the case 
of the adults. Among internal organs may be observed the calea- 
reous ring, a ventral Polian vesicle, and a dorsal uncalcified stone- 
canal, as well as a typically coiled intestinal canal. The young 
lie sometimes with the anterior, sometimes with the posterior end 
towards the genital aperture. 
In a younger stage the young are scarcely 1 millim. in length 
and possess but five tentacles; in the integument it is only in the 
three dorsal interradii that groups of wheels occur, one group in 
each close behind the tentacles and a second a short distance in 
front of the anus; the rudiments of the hook-shaped calcareous 
bodies of the integument, as well as of the calcareous rods in the 
tentacles, have only just begun to appear. 
I shall endeavour to give a precise description of the young 
stages here alluded to of Chiridota contorta, which is now found to 
be viviparous, in my memoir upon the antarctic Holothurians 
collected by Dr. Michaelsen. I shall there also have an opportunity 
of clearing up the synonymy of the antarctic Synaptidee (especially 
of Ohiridota purpurea, Lesson, which has been misinterpreted by 
Studer as well as by Théel and Lampert), and, with reference to the 
antarctic (hermaphrodite!) Cucwmaria crocea, which takes care of 
its brood, of giving a detailed account of the young forms, a large 
series of which I have at my disposal.—Zooloyischer Anzeiger, 
Bd. xx. No. 534 (June 28, 1897), pp. 217-219. 
* As to this, I have already published a note in my treatise on sea- 
cucumbers in Bronn’s ‘ Classen und Ordnungen,’ p. 182, so that Dendy is 
in error in asserting, as he has just done, that he is the first to discover a 
separation of the sexes in a Chiridota (Ch. dunedinensis, Parker).— Cf. 
Dendy, “Observations on the Holothurians of New Zealand, with 
Descriptions of four new Species, and an Appendix on the Development 
of the Wheels in Chirodota,’ Journ. Linn. Soc., Zool. vol. xxvi. 1897, 
28: 
+ The development of the wheels agrees perfectly with the account 
which I gave in 1892 of the origin and structure of Chzridota-wheels in 
general (Zeitschr. f. wiss. Zool. Bd. liv. pp. 850-364, t. xvi.). Dendy 
needs only to look at this paper, which he has left entirely unnoticed, in 
order to convince himself that it contains everything that he recently 
communicated as new concerning the mode of formation of Chiridota- 
wheels (cf. Dendy, loc. cit. pp. 49-50). 
t Zool. Anz. 1897, p. 154. 
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