296 Records uf the Indian Museum. [Vol. Ill, 



have been on l:>ricks, tiles and other submerged objects. The 

 largest colony that I have seen so far was on a tile; one side of 

 the tile was exposed above the mud of the bottom of the tank, 

 and its area measured about 120 sc^uare inches : the entire sur- 

 face was almost completely covered by a continuous growth of 

 Hislopia. Another large colony was on a piece of bark which 

 measured 7 inches by 3 inches : both sides were practically ever}-- 

 where covered by Hislopia. 



These specimens suggest that, within reasonable limits, the 

 size a colony may attain is only determined by that of the object 

 on which it grows. 



In these giant colonies the zooecia are somewhat compressed : 

 the typical oval shape is in a measure lost, and they become some- 

 what polygonal or circular and are of comparatively small size. 



The rainy season is evidently the time at which the growth 

 of Hislopia is at its maximum. The particular tank from which 

 I have obtained most of my specimens has been kept full of water 

 all through the hot weather ; the exuberant growth of Hislopia 

 during the " rains " cannot, therefore, in this case be attributed 

 to a larger area being available at this season. 



Now as usual almost every Paludina in the tank, except 

 quite small ones, is covered with Hislopia, and in this situation 

 the zocecia retain their oval form. 



H. J. Walton. 



CCELENTERATES. 



Branchiocerianthus imperator von der Kuste von Oman und 

 Baluchistan. — Wie aus einer kurzen Notiz von R. E. Lloyd (s. 

 Rec.Ind. Mus., vol, i, p. 1-2, 1907) bekannt ist, wurde der bilateral 

 symmetrische Branchiocerianthus imperator im Jahre 1906 durch 

 den "Investigator" (i) an der Kiiste von Oman, nahe deni 

 ostlichsten Punkt Arabiens unter 21° 49' 50" N. Lat. und 59° 48' o" 

 E. Long., und (2) an der Kiiste von Baluchistan unter 24° 45' o" N. 

 Lat. und 63° 50' 15" E. Long, aus 900 Meter (492 Fath.), resp. 995 

 Meter (544 Fath.) gedredgt. Durch die grosse Liebenswiirdigkeit 

 von Dr. Annandale in Calcutta, ist es mir moglich gewesen, 

 beiderlei Material zu untersuchen. 



Dies Material hat deshalb ein besonderes Interesse, weil hier 

 zum erstenMale ganz jugendlicheExemplare von 5rrt;/c/iZOC^;'m«///»s 

 vorliegen, und weil diese von den bisherigen Fundorten (Japan, 

 Nordl. Pacific, Golf von Panama und Ostafrika) so entfernte 

 Lokalitat iiber die geographische Verbreitung des Genus ganz neue 

 Perspektiven eroffnet. Leider sind samtliche Exemplare sehr 

 schlecht erhalten, offenbar audi nur in starkem Alkohol conserviert, 

 sodass sie stark geschrumpft und sehr hart und briichig geworden 

 sind. Das Material besteht aus 10 Exemplaren von Baluchistan, 

 der^n Grpsse z'wischen 60 und 120 mm. schwankt, und i Exemplar 



57 



