353 



PISNOTHERIID-E. 



PINUS. 



3:1 



SI. Milne-Edwards is of opinion that P. Cranchii, Leach ('Malac.,' t. 



, f. 4, 5), does uot differ specifically from P. Piium. 



P. veteran is found in Pinna on the coasts of Italy, &c. 



Pinnotheres vetenim. 



Elamena, (M. Edwards) is founded on Uymenosoma Mathcei, figured 

 by M. Riippell, in his work on the ' Crustacea of the Red Sea,' and 

 separated from that genus by M. Milne-Edwards, who thinks that 

 it seems to establish the passage between the Ilymenosomata, the 

 Oxygtoma, and the Oxyrhyncki. 



E. ilal/iiei (Riippell, ' Krabben,' pi. v., f. 1), is found in the island 

 of Mauritius and the Red Sea. 



ITymcnotoma (Leach). Carapace very much flattened above, and 

 nearly circular; the front very narrow and inclined. Orbits very 

 small, and nearly circular, and the eyes must be bent back downwards 

 rather than outwards to be hidden in them. 



M. Milne-Edwards remarks that hitherto this genus has been 

 arranged in the neighbourhood of the Inachi, principally on account 

 of its narrow and pointed front; but its natural position appears to 

 him to be in the family of the Catametopet, for it is to this type that 

 it approaches in all the important points of its organisation. 



H. orbiculare is found at the Cape of Good Hope. 



Hymentitoma orlicvtart. 



a, internal antenna ; ft, external antenna ; c, right external jaw-foot ; d, 

 abdomen of the male ; e, abdomen of the female. 



Mycterii (Latreille). Carapace extremely delicate, nearly circular, 

 and very convex above. Front disposed nearly as in the Ocypode,- 

 [OI:YPODID.K]; but the eyes, which are short and stout, have no orbi 

 tary cavity for concealment, and always remain projecting. 



M. longicarpit has the carapace smooth and divided by furrows into 

 three longitudinal portions; a small spine at the spot where the 



HAT. HIST. DIV. VOI,. IV. 



external orbitary angle is ordinarily found ; anterior border of the 

 carapace very much projecting, and furnished with hairs. 



It is a native of Australia. 



Doto (M. Edwards) M. Milne-Edwards remarks that he here 

 places, not without doubt, a small and very remarkable crustacean 

 which Savigny has figured in the great work on Egypt, and which 

 M. Audouin has referred to the genus Mycterii. It approximates to 

 the Ocypodei much in the general form of the body, in that of the 

 feet, and in the disposition of the front, the antennae, and the eyes ; 

 but it is distinguished from all the preceding Catametopes by the con- 

 formation of the external jaw-feet and the form of the buccal frame. 



D. tulcatui (Cancer sulcatus, Forsk. ; Mycterii sulcatus, Audouin). 

 has the carapace nearly square, and furrowed above ; the front orbital 

 border occupying nearly the whole of its width. Length about six 

 lines. 



It inhabits the Red Sea. 



Solo nlealut, enlarged. 



a, profile view, still more enlarged, without the leg*, to show the grooves ; 

 ft , detail of under part of carapace. 



PINNULARIA, a genus of Fossil Plants. 



PINTADO. [PAVONID-E.] 



PINTAIL DUCK. [DUCKS.] 



PINUS, a genus of Gymnospermous Exogenous Plants, consisting 

 for the most part of timber trees, inhabiting various temperate coun- 

 tries in the northern hemisphere. They are commonly called Pine- 

 Trees, and are distinguished from the Firs by their leaves, always 

 evergreen, and needle-shaped, growing in pairs, threes, fours, or fives, 

 surrounded by a membranous sheath at their base. In reality each 

 parcel of leaves Indicates a small branch axillary to a membranous, 

 deciduous, withering leaf. The species are generally of great beauty 

 as objects of ornament, or of much value on account of their timber, 

 and are in much request by the planter : on which account we give 

 a very brief enumeration of the best known specie?. 



Div. I. Scales of Cones truncate at apex. 



a. Leaves in pairs. 

 * Scales of Cones spineless at apex. 



1. P. sylvestrit, the Scotch Pine. Trunk erect. Leaves 2, short, 

 glaucous. Cones ovate, stalked, and recurved, with rugged, truncated, 

 depressed scales. This is the most hardy and valuable of all the pines. 

 Its timber furnishes the red deal of the carpenter?, and in Scotland, 



2 A 



