_Statoblasts._ Both free and stationary statoblasts are formed, but the
latter are rare and do not always adhere. They resemble the free
statoblasts in general form but have a solid margin instead of a
swim-ring and are often minutely serrated round the edge. The free
statoblasts are at least considerably, sometimes very elongate; in all
zoaria it is possible to find specimens that are more than twice as long
as broad. The capsule is relatively large and resembles the swim-ring in
outline, so that the free portion of the latter is not much narrower at
the sides than at the ends. The sides are distinctly convex and the ends
rounded; the swim-ring encroaches little on the surface of the capsule.
_Polypide._ The tentacles number between 40 and 50 and are not festooned
at the base. The stomach is slender and elongate.
TYPE not in existence.
SYSTEMATIC REMARKS.--_P. fruticosa_ is closely allied to _P. repens_
(European and N. American) but always has much longer statoblasts. Three
phases of the species may be distinguished as follows:--
A. (_Forma typica_). Zooecia stout in form, not greatly
elongate; free branches produced in profusion.
B. (_P. stricta_, Allman, _P. repens_, van Beneden). Zooecia
slender; free branches absent or consisting of two or three
zooecia only.
C. (_P. coralloides_, Allman). Vertical zooecia pressed
together and greatly elongated.
Indian specimens of the typical form agree well with German specimens
labelled by Prof. Kraepelin _P. princeps_ var. _fruticosa_, and
specimens of the _coralloides_ phase could hardly be distinguished from
similar specimens from Scotland.
GEOGRAPHICAL DISTRIBUTION.--_P. fruticosa_ is widely distributed in
Europe and probably in N. America. I have seen Indian specimens from the
Punjab (Lahore, _Stephenson_), from Bombay, from Travancore, from
Calcutta and other places in the Ganges delta, from Rajshahi (Rampur
Bhoolia) on the R. Ganges, from Kurseong in the E. Himalayas (alt. 4,500
feet), and from Kawkareik in Tenasserim. Statoblasts found on the
surface of a pond near Simla in the W. Himalayas (alt. _ca._ 8,000
feet), probably belong to this species.
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