294 Miscellaneous. 
greyhound. The tubercular grinders are very variable in this tribe, 
as will be seen in the following table :— 
False grinders. Tubercular grinders. In all. 
s 3 a 5 
Cynalicus ri i G 
3 2 6 
Cuon ...6.--5 | rs 
3 2 6 
Canis and Vulpes = . 7 
3 2 t 
Otocyon ...... 3 > ry 
TROPHONIA GOODSIRI1. 
(Ann. Nat. Hist. vol. iv. p. 371.) 
The description of this worm was made from specimens preserved 
in spirits. These, it now appears, were mutilated, having had their 
tentaculated proboscis detached by the shakings to which they had 
been exposed in their carriage from the Shetlands hither; the more 
easily done, since they were mixed up in the phial with other marine 
animals. A few days ago I procured three fine living individuals, and 
I thus learned that the worm has asmall membranous retractile pro- 
boscis furnished with two antennz and eight tentacula. The an- 
tenne are larger and twice as long as the tentacula, filiform and 
subannulated; the tentacula are rather pointed and smooth, and in 
these specimens were flesh-coloured. They encircle the orifice of the 
proboscis, and are easily detached by pressure with a needle after 
the worm has been killed in spirits. 
The discovery of this structure leads to further corrections, for 
there cannot be the slightest doubt of Trophonia Goodsirii being s 
onymous with the Amphitrite plumosa of Miller, and with the 
mingia muricata of the author of this note. See for the synonyms, 
Ann. and Mag. Nat. Hist. vol. xvi. p. 447. 
The anterior portion of this worm is often bulged like that of an 
Arenicola. Its resemblance, both in outward figure and in motions, 
and in mutability of shape, to a Holothuria, e.g. to the Holothuria 
inherens of Miller, is very remarkable.—Groreas Jounston, Ber- 
wick-upon-T'weed, March 6. . 
On the possibility of obtaining healthy Tubers from diseased Potatoes. 
By M. Duranp. 
About the beginning of October I planted diseased tubers in the 
earth where they were first developed. They were planted in a hot- 
house, the temperature of which was constantly from 48° to 54° 
Fahr. These tubers, buried to a depth of about four inches, appeared 
above ground in six weeks. Their vegetation was fresh and vigorous ; 
the leaves attained a height of forty inches. 
I lately pulled up these plants, and ascertained that they all bore 
a certain number of new tubers, the largest of which were of the size 
of a hen’s egg; that none of these tubers has the least spot exter- 
nally or internally; on the contrary, they bear all the characters of 
perfect health.—-Comptes Rendus, March 9, 1846. 
