Chap. XVIII.] UTRICULARIA ORBICULATA. 369 



Utricularia amelhystina (Guiana). This species has 

 small entire leaves, and is apparently a marsh plant; but it 

 must grow in places where crustaceans exist, for there were 

 two small species within one of the bladders. The bladders 

 are nearly of the same shape as those of Utricularia mon- 

 tana, and are covered outside with the usual papillse; but 

 they differ remarkably in the antennae being reduced to two 

 short points, united by a membrane hollowed out in the mid- 

 dle. This membrane is covered with innumerable oblong 

 glands supported on long footstalks; most of which are 

 arranged in two rows converging towards the valve. Some, 

 however, are seated on the margins of the membrane; and 

 the short ventral surface of the bladder, between the petiole 

 and valve, is thickly covered with glands. Most of the heads 

 had fallen off, and the footstalks alone remained; so that 

 the ventral surface and the orifice, when viewed under a 

 weak power, appeared as if clothed with fine bristles. The 

 valve is narrow, and bears a few almost sessile glands. The 

 collar against which the edge shuts is yellowish, and presents 

 the usual structure. From the large number of glands on 

 the ventral surface and round the orifice, it is probable that 

 this species lives in very foul water, from which it absorbs 

 matter, as well as from its captured and decaying prey. 



Utricularia griffithii (Malay and Borneo). The bladders 

 are transparent and minute; one which was measured being 

 only tUtt of an inch (.711 mm.) in diameter. The anten- 

 nae are of moderate length, and project straight forward; 

 they are united for a short space at their bases by a mem- 

 brane; and they bear a moderate number of bristles or hairs, 

 not simple as heretofore, but surmounted by glands. The 

 bladders also differ remarkably from those of the previous 

 species, as within there are no quadrifid, only bifid processes. 

 In one bladder there was a minute aquatic larva ; in another 

 the remains of some articulate animal ; and in most of them 

 grains of sand. 



Utricularia ccerulea (India). The bladders resemble 

 those of the last species, both in the general character of the 

 antennae and in the processes within being exclusively bifid. 

 They contained remnants of entomostracan crustaceans. 



Utricularia orhiculata (India). The orbicular leaves 

 and the fitems bearing the bladders apparently float in water. 



