TWO SPECIES OF HYDRACTINIA 
471 
near the mouth; the other as long as the former but very slender, with 
over 60 filiform tentacles arranged in several rows around the mouth. 
Gono som e — Unkno w^n . 
Locality — Between Misaki and Jogashima;^ covering shells con- 
taining hermit crabs. It was collected by Mr. I. Shishido in April, 
1889; but there are no reproductive bodie>. It cannot therefore, be 
decided whether it belongs to Podocoryne or Hydractinia; but there 
are two forms of hydranths, and the species has been referred provi- 
sionally to Podocoryne on the assumption that the larger polyps are 
nutritive and the smaller ones give rise to the reproductive bodies. 
The two forms of hydranths are comparatively large. 
The figures accompanying the description leave no doubt 
that it refers to the species before us, although the entire form of 
the colony is not reproduced. It is, however, but natural that 
Inaba's description has not been recognized by western students 
of hydroids, since it was published in the Japanese language. 
Therefore Stechow's recent descriptions are practically the first 
adequate ones accessible to general students. They, but especi- 
ally the full description of '09, are, as a whole, sufficiently accu- 
rate and generally accessible, so that I shall confine myself to 
one or two remarks and the addition of a few details not men- 
tioned in his descriptions. 
First as to its occurrence. It appears to be common in several 
parts of the Bay of Tokyo and of Sagami, and according to Stimp- 
son it occurs as far north as Hakodate. Stechow,^ gives its bathy- 
metrical range as 7-180 m. (4-100 fathoms), and for six of the 
specimens collected by Haberer it is stated with a query that they 
were found on the beach — ''Strand?'' The specimens collected 
by myself are all from the Bay of Tokyo, off the small village of 
Kanazawa, where they can be easily obtained by collecting with 
the hand trawls commonly used by the fishermen of this part. 
They are from shallow waters, about 16 meters or so, and I have 
also picked up living specimens on the beach, \vhere they were 
evidently washed up with the hermit crab still alive and occupy- 
ing the skeletal shell. 
* A small island off the town of Misaki. « Loc. cil. : "09. p. 24. 
