metcalf: opalina and the ciliate infusoria 427 



Omiltemia Standley, gen. nov. 



Branched shrubs, more or less pubescent, the branchlets angulate. 

 Leaves opposite and ternate, petiolate, membranaceous. Stipules 

 minute, deciduous. Flowers of medium size, red, axillary, solitary, 

 long-pedicellate, the pedicels bibracteolate at the base; calyx tube 

 narrowly turbinate, the limb 4-lobate, the lobes linear-subulate, sub- 

 equal, persistent; corolla tubular, glabrous, the tube elongate, slender 

 and constricted near the base, ampliate in the upper three-fourths, the 

 limb 4-lobate, the lobes short, oblong-ovate, subulate-acuminate, erect 

 or ascending, contorted. Stamens 4, inserted at the base of the ampli- 

 ate portion of the corolla tube; filaments filiform, exserted; anthers 

 linear, dorsifixed, mucronate, bifid at the base. Disk depressed. 

 Ovary 2-celled; style filiform, exserted, glabrous; stigma fusiform; ovules 

 numerous, imbricate, the placentae oblong, peltately affixed to the 

 septum. Capsule 2-celled, cylindric, elongate, subcoriaceous, costate, 

 loculicidally bivalvate at the apex. Seeds numerous, minute, subglo- 

 bose, obtusely angulate, the testa lustrous, reticulate; endosperm fleshy. 



Type species, Omiltemia longipes Standley. 



Omiltemia longipes Standley, sp. nov. 



Shrub, about 3 meters high, the branches stout, grayish, terete, the 

 branchlets slender, puberulent when young, densely leafy; stipules 

 deltoid, about 1 mm. long; leaves mostly ternate, the petioles slender, 

 2-6 mm. long, puberulent, often marginate to the base, the blades ob- 

 lanceolate or oblanceolate-oblong, 3-7 cm. long, 0.8-1.7 cm. wide, 

 acuminate or long-attenuate at the base, acute to long-attenuate at 

 the apex, often abruptly so, thin, bright-green, concolorous, glabrous 

 above or puberulent along the costa, the venation plane, villosulous 

 beneath along the veins or glabrate, inconspicuously striolate, the costa 

 slender, prominent, the lateral veins prominulous, 4-6 on each side, 

 arcuate; pedicels 1.7-3.5 cm. long, filiform, sparsely short-pilose, 

 the bractlets minute, linear, green; calyx very sparsely short-pilose or 

 glabrate, the tube 6-7 mm. long, the lobes 3^ mm. long; corolla red, 

 about 4 cm. long, the contracted portion of the tube about 1 cm. long 

 and 1.2 mm. thick, the upper portion 5-6 mm. thick, the lobes about 

 5 mm. long; anthers 7 mm. long, the filaments about 2.5 cm. long; style 

 about 4.5 cm. long; capsule 1.4 cm. long, 2.5-3 mm. thick; seeds brown. 



Type ir> the U. S. National Herbarium, no. 399394, collected at 

 Omilteme, Guerrero, May, 1903, E. W. Nelson 7054. 



ZOOLOGY. — Opalina and the origin of the ciliate Infusoria.^ 

 Maynard M. Metcalf, Orchard Laboratory, Oberlin, 

 Ohio. (Communicated by M. W. Lyon, Jr.) 



Study of a large amount of material from th-e United States 

 National Museum collections of frogs and toads shows several 



1 Abridged from a paper read before the Biological Society of Washington, 

 May 4, 1918. 



