88 BRITISH TUN1GATA. 



nine on each side of the folds and four between them. 

 The tentacular filaments are pinnate, of nearly equal 

 size, and number twenty-four or twenty-five. The 

 branchial tubercle (PL XLVIII, fig. 6) is large, trans- 

 versely oval, and strongly convoluted, the convolutions 

 being directed upwards. The oral lamina (PI. XL, 

 fig. 8) is broken up into about twenty-five tentacular 

 processes which are attenuated, sharp at the points, 

 and much inflated at the base, and are supported on a 

 narrow membranous ridge. 



The alimentary canal (PL XXXIII, fig. 3) forms a 

 single open loop which extends from the bottom of 

 the pallial sac for more than two-thirds the length of 



FIG. 55. FIG. 56. 







. 



- 



I 



_, c< ' 



. 



FIG. 55. The liver in Cynthia ovata. FIG. 56. The liver in Cynthia 



morus. Magnified. 



the endostyle ; the calibre of the tube is pretty-equal 

 throughout, the stomach being scarcely distinguishable. 

 The liver (PL XXXIII, fig. ^3 and fig. 56 in text) is 

 well developed and is composed of three or four lobed 

 masses, which when in a fresh state are of an orange 

 colour, but when preserved in spirit are of a pale 

 greenish yellow ; the masses are made up of dense 

 dendritic tufts, the extremities of the branches of 

 which, extending upwards, give to the surface of the 

 organ a minutely - papillose appearance; in this 

 branched and dendritic structure the organ is very 

 similar to that of many of the Brachiopods. 



The reproductive organs (PL XXXIII, figs. 3-5) 

 are rather voluminous, and are composed of congeries 



