CIBBIPEDIA. 



By N. AnnandaeE. 



There is not much to be said about the barnacles of the Chilka L,ake, for only 

 two species, both of which are common and widely distributed, are represented, 

 namely Dichelaspis cor and Balanus amphitrite. Both were found abundantly in 

 the outer channel of the lake. The only species observed in the main area was B. 

 amphitrite, of which a few individuals were noticed on rocks and the bottom of 

 boats. 



Dichelaspis cor probably breeds in the outer channel and this may also be the 

 case with Balanus amphitrite, but larvae of the latter almost certainly enter annu- 

 ally from the sea. Both species were found in the adult state in the fresh- as well 

 as the salt-water season. 



No Rhizocephala or other true parasitic forms were found. 



Suborder PEDUNCUIyATA. 



Family Lepadidae. 



In addition to the species discussed below, another member of this family (the 

 common Lepas anserifera, Iyinn.) is represented by several specimens that were taken 

 in a dead or moribund condition from a stick floating in the outer channel near 

 Manikpatna in March, 1914 This species can hardly be included in the fauna of 

 the lake on evidence so slight, for the stick had probably drifted in from the sea. 



Dichelaspis cor, Aurivillius. 



1909. Dichelaspis cor, Annandale, Mem. Ind. Mus. II, p. 119, pi- vi, figs. 7-10. 



This species is common on the gills of the crab Scylla sen ata in the outer chan- 

 nel at all times of the year. In the main area we failed to find it, though the 

 crab was common. Some of our specimens are of very large size, the capitulum 

 being 3 mm. in breadth and the peduncle 8 mm. long. All of them belong to 

 Gruvel's var. A. D. cor has been found in the gill-chamber of Panulirus in the sea 

 but is particularly common in that of Scylla serrata in estuarine tracts. Its dis- 

 tribution extends from East Africa to Sumatra. 



The larvae are able to hatch from the egg and to live, at any rate for some 

 hours, in pure fresh water. This I have seen in the case of specimens from the gills 

 of crabs purchased in the Calcutta market. The adults which produced the eggs 

 lived for at least twelve hours out of water. 



