696 Proceedings of the Royal Irish Academy. 



slightly, twisted. Leaf linear, naiTOTv at base, widest above base,, 

 contracting gi-adnally towards the apex, and then suddenly narrowing 

 with a sharp point ; upper sui'face dark shining green, generally with 

 no stomata, but occasionally with a partial row near the apex of the 

 leaf in the middle line, below with a band of stomata on each side 

 of the midrib, there being fi'om 6 to 7 rows in each band. Leaves 

 about 1 inch in length, and about rs iiieh wide. Buds covered with 

 yellowish-brown resinous scales. 



Transverse section of leaf. — Leaf flattened, about three times- 

 broader than thick, sides rounded, upper surface nearly flat or gently 

 cui'ved inwards, below with a slightly prominent midrib. Hypoderma 

 well developed, forming a continuous layer from the resin-canal of 

 one side, under the upper epidermis, to the resin-canal of the other 

 side ; at the margins the hypoderm is greatly developed, being gene- 

 rally three cells thick, a double layer of hypoderm below the double 

 fibro-vascular bundle. The resin-canals are placed at each side of 

 the leaf, close to the epidermis of the under side. The pallisade 

 parenchyma is well developed on the upper side, while below is the 

 parenchyma with intercellular spaces communicating with the stomata. 



Fibro-vascular bundle double, the whole suiTounded by a well- 

 marked sheath. 



The figure (Plate 48, fig. 24) is drawn from a specimen grown in 

 Glasnevin Garden, and kindly given to me by Dr. ]5ioore. 



A plant growing in the Botanic Garden, at the Agricultural 

 College, Cirencester, had an incomplete row of stomata on the upper 

 side of the leaf. 



Specimens from Glasnevin, Edinburgh, and Cirencester have been 

 examined. One fi'om the Museum, Eoyal Botanic Garden, Edinbiu'gh, 

 has cones ; and the leaves fi-om the cone-bearing shoots do not differ 

 fi'om those on the ordinary branches, except that the leaf is, at the apex, 

 slightly bevelled off from behind, and there are a few stomata near 

 the apex. 



The forms described as Abies Eegina? Amelise, Heldr., and Abies 

 Apollinis, Link., have been examined. According to Mr. Andrew 

 MuiTay (Lawson's " Pinetum," part v.), Pteginfe Amelise is a variety of 

 Abies Apollinis, which he makes a species distinct fi'om A. cephalonica. 

 Mr. Murray says of Pv-eginee Amelia, ''foliis crassis, sub-acuminatis ; " 

 but I cannot observe any difference between the leaves of this form 

 and P. cephalonica except that the hypoderma is less developed. The 

 leaves of a cone-bearing shoot of cephalonica are like those figured by 

 Mr. MuiTay (Lawson, "Pineturu," part v., fig. 1) for Apollinis, while 

 the leaves of the plant cultivated in the Eoyal Botanic Garden, Edin- 

 burgh, differ only in having the margin less rounded, and having a 

 slightly developed longitudinal fui-row above. 



Mr. Mui-ray (Pinet. Brit., part iii.) gives figures of P. Panachaica, 

 Heldr., and reduces that species to P. cephalonica. Erom an examina- 

 tion of Mr. Murray's figures, and of recent specimens, I have no 

 hesitation in reducing A. Peginae Amelise, Helch-., and A. Panachaica, 

 Heidi'., to cephalonica, while Apollinis may rank as a variety, bridging 



