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ROBERT SOHARFF. 
were observed, which may be due to their having been destroyed 
through the action of the alcohol. 
Keferstein 1 makes mention of similar organs in Phasco- 
losoma, but he seems as yet doubtful whether he should call 
them “ sensory organs,” not having been able to find any 
connection with nerves. Soon after, however, he published 
another paper 2 in which he calls them organs of touch 
(Tastorgane), and proves that they are supplied by special 
nerves. 
One of the more recent writers is Teuscher , 3 who, in his 
description of the skin of Phascolosoma, mentions utricular 
bodies in connection with two or three nerves-fibres. “ Their 
interior contains, in a finely granulated mass, a number of 
larger grains which seem partly attached to threads hanging 
down from the apical part.” This passage reminds me very 
much of the elongated hypodermic cells which I have so often 
described, and it seems to me not at all unlikely that the 
above-mentioned long threads are nothing but similar cells 
with their conspicuous nuclei. GreefF , 4 who made the 
Gephyrea armata his special study, gives us much valu- 
able information as to the occurrence of organs of touch 
(Tastpapillen), which, however, lie in a layer of connective 
tissue beneath the epithelial or hypodermic layer. They are 
either arranged in rings round the body, or they may be spread 
all over. The nervous connection was traced all the way from 
the nerve-cord to these papillae. 
I have already had the opportunity in another place of 
referring to Eisig’s researches “ liber die Seitenorgane der 
Capitelliden .” 5 He describes sensory organs having the form of 
buds, and others sunk down into cup-shaped invaginations of 
1 Keferstein, “ Uutersuchungeu liber niedere Seethiere,” ‘ Zeitsclir. f. wiss. 
Zoologie,’ vol. xii, pp. 41, 42. 
2 Keferstein, “Beitrage zur Anatomie und systematischen Kenntniss der 
Sipunculiden,” ‘ Zeitsclir. f. wiss. Zoologie,’ vol. xv, p. 405. 
3 Teuscher, “Notiz liber Sipunculus und Phascolosoma,” ‘Jeuaische 
Zeitschrift,’ vol. viii, p. 495. 
4 Greeff, “ Die Echiuren,” ‘ Nova Acta Akad.,’ vol. xli, p. 44. 
5 Eisig, loc. cit., p. 280. 
