22 Contributions to Western Botany. [ZOE 
Gulf of California. Inu Sonora I found only Ocnerodrilus sonore. 
In Central America the species were equally confined. In the 
vicinity of the City of Guatemala I found four distinct species of 
Ocnerodrilus, each one of which was confined either to a certain 
garden or to a certain creek or pond, while in parts of the 
country other species were found equally restricted. The Enchy- 
treeides are almost equally circumscribed geographically. A 
species of Pachydrilus could only be found in a single little 
creek (Rush Creek, Fresno County) in the Sierra Nevada, and I 
searched for it in vain elsewhere, though small creeks abound 
there everywhere not one mile apart. Another gigantic 
Enchytrzeus, several inches long, was confined to a single little 
meadow on the south fork of King’s River. Only one or two of 
the California limicolids have a wider distribution, and they are 
species of Limnodrilus, which genus shows a greater adaptability 
to different localities than any other. With such restricted 
geographical distribution it is to be expected that many interesting 
and aberrant oligocheta may yet be found in almost every 
isolated water course or pond, especially in countries where, 
through the division of seasons into dry and rainy, the water 
courses and ponds are comparatively scarce and disconnected. 
CONTRIBUTIONS TO WESTERN BOTANY. No. 4. 
BY MARCUS E. JONES. 
Astragalus candidissimus (Benth.) Wat. Probably from a 
woody root if not shrubby, rather tall, a foot or two high at least; 
stems flexuous; peduncles one and one-half times longer than 
the leaf, rather stout; stipules minute. Mr. Brandegee’s speci- 
mens from Magdalena Island have about eight pairs of leaflets, 
obovate-cuneate, rounded or emarginate at apex, scarcely petiolu- 
late, appressed silvery silky, five lines or less long; whole leaf 
three inches long; petiole an inch or less long; flowers, in dense 
spikes which are two inches long, five lines long, almost sessile, 
minute bract twice as long as pedicel; calyx black-hairy, two 
lines long, cleft deeper on the upper side, teeth short, triangular, 
one-half the length of the campanulate tube; pods sessile, 
