species in the absence of the strong sulcations which are so characteristic of the genus. 

 Possibly it belonged to an extinct closely allied genus. 



Coriaria, which is the only living representative of the order, contains shrubs 

 of Spain, the Mediterranean region, China, Nepal, Malaya, New Zealand, Polynesia, 

 Central and South America. 



ANACARDIACEAE. 



PISTACIA ACUMINATA Sp. nov. 

 PI. X, figs. 19, 20. 



Endocarpium ovatum, acuminatum, asymmetricum, hilo basali prominente; 

 striae longitudinales, e hilo radiantes, latere ventrali gregem compactum sum* 

 MUM apicem ATTINGENTEM efficientes. 



Endocarp ovate acuminate asymmetric; walls rather thin; hilum basal prominent; 

 longitudinal striae radiating from the hilum, and along the ventral side forming a close 

 band extending to the apex; surface sculpture small irregular hexagonal pits. 



Length 6 mm., breadth 4 mm. Reuver, Swalmen. 



This endocarp has so many characters in common with different species of 

 Pistacia, that we feel little hesitation in referring it to that genus. It differs however 

 from all the species we have been able to examine in being thinner*walled (though this 

 may be due to crushing), in being more asymmetric and acuminate. The endocarp of 

 P. mutica has been photographed (fig. 21) as showing the general form of the endocarp 

 and the prominent hilum in this genus. P. mutica, however, does not show clearly the 

 longitudinal fibres on its endocarp; these are better seen on P. vera. The species of 

 Pistacia have endocarps differing greatly in size and shape, that of P. vera being 20 mm. 

 long and of an oblong*oval shape, whilst P. terebintha is 5 mm. long and broader than 

 it is long. Some species are quite rounded, or even emarginate at the apex. It will be 

 seen, therefore, that our species occupies an intermediate position, combining charac* 

 teristics now scattered among many different species; this may imply that it is an 

 ancestral form. 



Pistacia is confined to the northern hemisphere. 



TESCHIA CRASSICARPA Gen. et Sp. Nov. 



PI. X, figs. 22a, b. 



Fructus calyce persistente inclusus; calyx ad fructus basem adnatus, 

 5*lobatus, lobis dorsalibus duobus in alas fructum involventes productis, lobis 

 TRIBUS ANTICIS BREVIBUS latibusque; fructus siliquosus, semine solitario; RADICULA 

 AD FACIEM INTERIOREM (SUPERIOR?). 



Fruit enclosed in persistent calyx; calyx attached to the base of the fruit, 54obed; 

 2 dorsal lobes produced into wings enveloping the fruit; 3 front lobes short and broad; 



108 



