8 
Form ii. may be defined as a new species, thus :— 
_ Rhizophora Harrisonii, Leechman; species nova a R. 
Mangle, L., inflorescentia composita, a Kk. racemosa, Meyer, 
pericarpio gracili et radicula brevi distincta. 
Arbor ad 20 m. alta, radicibus aeriis crebris a ramis superior- 
ibus descendentibus. Folia iis R. Mangle similia sed ferme 
elliptica, 11-15 cm. longa, 4-7 cm. lata, supra virentia, subtus 
punctis nigricantibus adspersa. Inflorescentia ramosissima, 
quinquies vel sexies repetito-dichotoma, articulata, multiflora. 
Rama et ramuli inflorescentiae graciles, pedunculi plus minusve 
45 mm. longi, articuli seriatim breviores—20, 11, 9 et 7.5 mm. 
longi—in utraque dichotomia e margine calyciformi inaequa- 
liter sexdentato enati. Flores iis R. Mangle similes sed 
minores, 1°3 cm. longi, suaveolentes, praesertim sub occasum 
solis, demum campanulati. Alabastra flavescentia, ovato- 
lanceolata, 11 x 5 cm.. Calyx flavescens, profunde quadri- 
partitus, persistens, segmentis coriaceis lanceolatis acuminatis 
13 x 4mm. demum late patentibus. Letala 4, candida, lineari- 
lanceolata, acuminata, margine saepe hirsutissima, demum 
inter segmenta calycis valde reflexa, quibus paulo breviora, 
caduca. Antherae 8, corolla breviores, aequales, caducae. 
Stylus leviter sulcatus; stigmata semper duo. Pericarpium 
rectum, plus minusve 4 x 1:5 cm. ovato-lanceolatum, scabrum 
et saepe maculatum. Radicula ad 30 cm. longa, omnino ferru- 
ginescens, 
The robust habit, dark-green foliage, stout panicles and huge 
radicles of my form iil. (? R. racemosa) make it very easy to 
distinguish it from R. Harrisoni even from a distance. I hope 
soon to be in a position to add details of the distribution in 
British Guiana of these three species of Rhizophora. 
I am indebted to Dr. Stapf for valuable advice and assistance, 
and I am also obliged to Mr. J. Rodway, F.L.S., of George- 
town, for the loan of the works of Jacquin and of Meyer to which 
reference has been made. 
III.—DISEASES OF PARSNIPS. 
STUDIES FROM THE PaTHonocicaL Laporarory: VI. 
A. D. Corton. 
(With Plates.) 
ke the matter the subject of special enquiry. Two visits 
for this purpose were paid to Evesham and district, and consider- 
able light on the subject has been obtained. At the same time 
ps, three of which were new 
to the country and one apparently capable of causing severe 
