156 CEYLON PEARL OYSTER REPORT. 



shows considerable variation in length and thickness. Some of the specimens have the 

 somatocyst similar in shape and size to that shown in my figure of the species, whereas 

 in other specimens it is longer (the length varies from 2 millims. to 3^ millims.) and 

 much thinner. The length of the hydrcecium is also variable, about one-third to half 

 the length of the umbrella. 



Order : PHYSOPHOILE, Eschscholtz, 1829. 



Family : AGALMIDiE, Brandt, 1835. 



Cupulita, Quoy et Gaimard, 1824. 



There is one small specimen of a Cupulita, from the Cheval Paar, which is very 

 much broken up. I am unable to determine the species. 



Agalmopsis, Sars, 1846. 



There are two small specimens, from the Cheval Paar, both of which are badly 

 contracted and broken. The nectophores have all disappeared with the exception of 

 a few minute buds, and only one damaged bract remains. The tricornuate tentilla 

 are large and in excellent condition. 



Family : PHYSALIID^, Brandt, 1835. 



Physalia, Lamarck, 1801. 



Physalia utriculus, Eschscholtz, 1829. 



Physalia utriculus, Huxley (1859, p. 101, pi. x., pi. xii,, fig. 12); Browne (1904, p. 744). 



Two small specimens were caught off Watering Point, Galle. The float is about 

 1 5 millims. in length. There is one main tentacle and several very small secondary 

 tentacles. The gonophores are beginning to develop. 



Family : PORPITIDyE, Brandt, 1835. 



Porpita, Lamarck, 1801. 



Porpita is represented by the remains of a single float, obtained on the Pearl Banks, 

 Gulf of Manaar, and measuring about 35 millims. in diameter. The upper surface of 

 the float has numerous radial rows of stigmata on the back of prominent ridges. It 

 resembles the float of Porpita umbella, which is figured by Haeckel (l 

 plate xlv., fig. 5). 



