22 ON SOUTH-AMEEICAN APOCTNACELS:. 



it should do if it were the inner integument : this albumen contains an embryo of equal 

 length and breadth, consisting of 2 fleshy foliaceous oval cotyledons, deeply cordate at 

 their summit, and furnished in the sinus with a superior terete radicle about ^ of their 

 length. 



It has been hitherto considered that the seeds in this genus have no albumen ; but I 

 think its presence is here manifested. 



Species excluded and otherwise referred : — 



AspiDosPERMA KAMiFLORUM, Miill. l. c. p. 55 : referred to Geissospermum. 



NiTiDUM, Miill. p. 59 „ Thyroma. 



POLYNEURUM, Miill. p. 57 J, ij 



PARVipoLiUM, Miill. p. 57 „ » 



CONDYIOCAKPUM, Miill. p. 55 „ ,) 



Sellowi, Miill. p. 56 „ „ 



RiEDELiij MuU. p. 56 „ >' 



BicoLOR, A. DC. p. 397 „ „ 



Lhotzkianum, Miill. p. 60 „ „ 



ANOMALUM, MuU. p. 61 „ „ 



sessiflorum, Miill. LimiBea, xxx. p. 399 „ „ 



CYLiNDROCAKPUM, Miill. p. 54 : probably belonging to Strempeliopsis. 



A drawing of Aspidosperma GoMEZiANrM, its iaflorescence, its floral analysis, its 

 follicle, and details of its carpological structure are shown in Plate III. a. 



Thyroma. 



When examining the Sippocrateaceee in the Hookerian herbarium in 1865, I observed 

 a specimen from the island of Trinidad, named, in the handwriting of Dr. Grisebach, 

 " Hvppocratea neurocarpa Griseb. ;" but this name was not included among the species 

 of that genus in his ' Elora Br. W. Ind.' (1864). In that work, however (p. 411), I 

 found the same plant described by him as Aspidosperma sessiflora, Miill. On referring to 

 Miiller's description of the same in Linn. xxx. 399 (1860), I was satisfied that it corre- 

 sponded weU with Grisebach's plant, also from Trinidad, from Sieber's collection. I 

 found in the same herbarium another specimen, from the island of S. Vincente, under the 

 handwriting of Grisebach, of Sippocratea neurocarpa, also in fruit. The examination of 

 the flowers and fruits convinced me that they belonged to a new genus, near Aspido- 

 sperma, and then named by me Thyroma*, the characters of which were at that time 

 fully described. 



Thyroma, nob. : Aspidosperma (in parte), Miill. ; Hippocrateoe sp., Griseb. : Flores par^d, breviter pedi- 

 cellati ; sepala 5, imo in cupulam crassam connata, oblonga, acuta, crassiuscula, imbricata, quorum 

 2 exteriora, intus squamula ciliolata, ssepe obsoleta munita, immutata persistentia. Corolla ealyce 

 2-3plo longior, tubo subcyHndrico, crassiuseulo, intus sub medium piloso, fauce squamulis 5 carno- 

 sulis segmentis oppositis apice conniventibus munito, segmentis 5 tubo 3-4plo brevioribus ovatis 

 aut oblongis, camosis, glabris, vix expansis, valde imbricatis et simplieiter sinistrorsum convolutis. 



* From Qvpa (janua), Sfiotos {similis), from the resemblance of its follicular capsule to two adjoining doors lunged 

 and folded together. 



