ANNOTATED LIST. 165 
There remains, nevertheless, a New Zealand holothurian, Chiridota geminifera Dendy 
and Hindle, which has the essential character of Scoliodota, namely, the entire absence of 
wheels. This now lacks a generic name, as I consider it would be unfortunate to modify 
the definitions of either T’rochodota or Toxodora in order to include it. But it is obviously 
closely related to the former. It must be remembered, however, that geminifera is based 
on only a single small specimen, 25 mm. long, collected some years ago and damaged by 
acid alcohol. Both the small size of the sigmoid bodies (0.050 mm.) and the absence of 
wheels might indicate immaturity, and it seems to me better to consider the type of 
geminifera as an aberrant individual of dunedinensis which has retained immature char- 
acters beyond the normal extent! than to make it the type of a new genus. Until more 
material is secured, therefore, I shall consider C. geminifera as a synonym of 7’. dunedinensis. 
In connection with the abandonment of Scoliodota and the dubious status of Chiridota 
geminifera, attention may well be called to the possibility that the specimens taken near 
Port Jackson by the Challenger, and referred by Théel to von Marenzeller’s Japanese 
species, really represent a chiridotid which normally entirely lacks wheels. Here again 
additional and undamaged material is necessary in order that the truth may be ascer- 
tained, but from the size, the number of digits on the tentacles, and the size of the sigmoid 
bodies, it seems almost certain that the Australian and Japanese forms are not identical. 
Ohshima’s second paper (1914) contains a good account in English of the synaptids 
of Japan, but it lacks illustrations, and certain details with reference to the wheels in 
Trochodota are not made clear in his descriptions. This is unfortunate, as the character 
of the wheels seems to be of fundamental importance in distinguishing species in this genus. 
The third paper (1915) deals with holothurians from the northwestern Pacific and adds a 
species of T'eniogyrus and one of Toxodora to those already known. 
As a result of these publications and my renewed study of the group, I venture to 
give a corrected key to the genera of this subfamily and to the species of its component 
genera (except Chiridota and Polycheira), believing that these will prove of service to 
future workers. 
Key to the Genera of Chiridotine.* 
A. No sigmoid bodies; wheels present, collected in little papille. 
B. Tentacles 12 (10 to 14); ciliated funnels single and scattered...............00. 0000s ee ee ee Chiridota 
BB. Tentacles 18 (16 to 20); ciliated funnels collected into stalked clusters. ................---- Polycheira 
AA. Sigmoid bodies present, or if absent, wheels are also wanting, and all deposits may be wanting. 
B. Wheels present; sigmoid bodies conspicuous. 
C. Wheels gathered into sharply defined papille............... 000. cece cece eee e een eees Teniogyrus 
CC. Wheels not gathered in papille, scattered in the skin, often numerous enough to be crowded 
into ill-defined heaps, sometimes so scattered as to be easily overlooked............ Trochodota 
BB. Wheels wanting; sigmoid bodies wanting. 
C. Deposits in form of minute curved rods scattered throughout skin................+.05+ Toxodora 
CC. Deposits wanting in body-wall. 
1D), Ue Ge) ORs oma Soe atte oe OS OnD ee Cot aeRO on oo maUmE Enea nan corr Oana nous Achiridota 
DD ehentaclesnt Oservectetererecveteererc rere cteve afar Kae versyape ahs. ohsle. ule] ole. e's isisieiejere\s vie\Sieielel(elal ae Kolostoneura 
Key to the Species of Teniogyrus. 
A. Tentacles 12; polian vessels several; sigmoid bodies not in well-defined groups. 
Polian vessels 6 or 7; wheels 0.042 to 0.130 mm. in diameter; sigmoid bodies 0.170 to 0.210 mm. long 
with greatest width, from tip of hook to back of shaft, about equal to length, and with 
inrolled end divided into a few short, pointed branches; rods in tentacles 0.170 mm. long; 
BOUCHE SOME AIMerICa =] LIL COLal lm prreeierereiste citer teisvernveleter ciel 280! ofavel <teraloyete contortus (Ludwig), 1874 
1 There is of course the obvious possibility that the absence of wheels is due to their having been dissolved by 
the acid alcohol, which has merely damaged the sigmoid bodies. eee 
2 This key as originally published in my Apodous Holothurians contains an unfortunate misprint, which indi- 
cates that there is no difference between Chiridota and Polycheira in the character of the ciliated funnels. ; 
3 Specimens from Kerguelen need a critical reexamination. The three specimens taken by the Siboga in the 
Java Sea, called Sigmodota contorta, also need a careful reéxamination. They are more likely dubius than contortus, 
but very likely neither. 
