532 abstracts: botany 



portion of the body in the genus Edwardsia. Thus, as Mackenzia cos- 

 talis presents characters not found outside of the Zoantharia, and in 

 that group pecuHar to the family Edwardsiidae, it seems necessary 

 to assign it to a position in the family Edwardsiidae, near the genus 

 Edwardsia. 



In brief the disposition of these fossils is as follows : 

 Holothuroidea 



Family Elpidiidae 

 Genus Laggania 

 Genus Louisella 

 Family Eldoniidae (near the Elpidiidae) 

 Genus Eldonia 

 Zoantharia 



Family Edwardsiidae 

 Genus Mackenzia. 



A. H. C. 



BOTANY. — Feroniella, genre nouveau de la trihu des Citresie, fonde surle 

 F. oblata, espece nouvelle de I'Indo-Chine. Walter T. Swingle. 

 Bull, de la Soc. bot. de France, 59 : 774-783. Fig A, PL 18. No. 

 8, seances novembre-decembre, 1912. Pub. Feb. 18, 1913. 

 To the eight known species of hard-shelled citrous fruits, comprising 

 four genera, is added a ninth species, Feroniella oblata, from Cochin- 

 china, the type of a new genus Feroniella. This genus resembles Fe- 

 ronia in having pinnate leaves, large flowers and one-celled fruits due 

 to the fusing of the 5 to 6 ovary cells, and differs from it in having 

 twice the number of stamens (four times as many as the number of 

 petals), filaments with hairy basal appendages, smooth seeds, and the 

 epicarp composed of radially disposed prismatic elements. Appen- 

 dices to the filaments are not known in any other plant hitherto studied 

 of the tribe Citreae. The hairs of the appendices become entangled 

 and form a sort of cup, protecting the base of the ovary from insects 

 too small to effect pollination. The structure of the epicarp of the 

 fruit also differs in its radially disposed woody structure from that of 

 the other genera of this tribe. 



The type of the genus, Feroniella oblata, takes its specific name from 

 the shape of the fruit which is a flattened spheroid like a mandarin 

 orange. A cross section of the fruit is figured and an excellent plate 

 shows a twig with leaves and flowers, giving the flower structure in 

 detail. This tree, which attains a height of 8 to 20 meters, is found 



