1919. | N. ANNANDALE: Sponges, Hydrozoa and Polyzoa. gt 
A single small specimen of a pale brownish colour and without 
buds or reproductive organs was taken amongst green filamentous 
alga in an irrigation-channel at Nasratabad, Seistan, in December. 
POLYZOA. 
The four species of Polyzoa collected in Seistan all belong to 
the Phylactolaemata and all but one are sessile, branching species. 
Otherwise they have little in common. ‘The two Plumatellinae are 
remarkable for the differentiation exhibited between the zooecia 
that produce free and those that produce fixed statoblasts. All 
the species were found in full activity in December, except the 
Afrindella, which was taken in foul water and was in a degenerate 
condition, densely packed with statoblasts of both kinds. Lopho- 
podella cartert, which elsewhere has been found associated with 
algae,! was only observed in an active state in Seistan attached to 
tubes inhabited by a small Oligochaete worm, but perhaps stolen 
by the worm from a Dipterous larva. 
Fredericella sultana subsp. jordanica, Annand. 
1913. Fredericella sultana jordanica, Annandale, Fourn. As. Soc. Bengal 
(is: pp. 223, pl. vil, figs. 51a, £0, te 
1915. Fredericella sultana subsp. jordanica, td., Trav. Sta. Biol. Volga 
(Saratow) V, p. 74. 
Specimens that may be assigned to this race were abundant 
in December both on the stems of bulrushes in the reed-beds of the 
Hamun-i-Helmand near Lab-i-Baring and on the lower surface of 
blocks of clay at the edge of the lake near the same place. It was 
also found on empty Unionid shells in the open lake: Though 
many of the colonies were degenerate they contained few stato- 
blasts and the peculiar thickening of the ectocyst noted in associa- 
tion with the formation of gemmules in the Lake of Tiberias was 
not observed. ‘The zooecia were narrow and still more strongly 
keeled and emarginate than in specimens from Palestine or the 
Volga. 
F, sultana is apparently cosmopolitan as a species. ‘The Pales- 
tinian race has hitherto been found only in and near the Lake of 
Tiberias and in the lower Volga system in eastern European Russia. 
In the plains of India it is replaced by the race ¢ndica, while 
the typical form occurs in the lakes of Kumaon in the Western 
Himalayas. 
Fam. PLUMATELIIDAE. 
Genus Plumatella, Lamarck. 
Subgenus Afrindella, Annandale. 
1912. Afrindella, Annandale, Rec. /nd. Mus. VII, p. 140. 
This subgenus has hitherto been found only in tropical Africa, 
India, Siam? and the Philippines. Its occurrence in Seistan is, 
L West and Annandale, Fowrn. As. Soc. Bengal (n.s.) VII, p. 83 (1911). 
® Plumatella (Afrindella) tanganyikae occurs in the inner lake of the Talé 
Sap in the Siamese province of Singgora or Sunkla. 
