﻿60 MR. F. W 



ON SOME JAVAN DEEP-SEA. LAGEN^ 



rather longer and somewhat bent ; and at the anterior extremity, near the point of 

 insertion of the neck-tuhe, they are deficient, their place being supplied by long fila. 

 mentous appearances, which are apparently minute canals. Tho walls in this specimen 

 are very coarsely foraminated, and the tubular neck considerably elongated, being about 

 once and a half the length of the ovoid portion. This tube still contains what is 

 apparently the dried sarcode stolon of the once Hving Foraminifer. A form in all 

 respects similar to fig. 42, but which, unfortunately, was accidentally broken, had an 

 additional row of shorter spines around the periphery, but recurved, so as to form a 

 secondary circlet bent back over the margin of the shell projK^r. 

 The form delineated in fi^. 42 is somewhat defective — the flask-walls being broken, and 



the marginal film incomplete at the base. 



In the more lenticular form (fig. 43) the shell-walls are more transparent, and finely 

 perforated, while the external neck is considerably shorter. The marginal border appears 

 to he composed of a double layer of shell-substance ; while on each side of this the spines 

 of fig. 42 are represented by a circlet of short, flat, triangular processes of a milky-wliite 

 hue, somewhat resembling a shark's teeth, and wHch project from the periphery of the 

 shell. At the centre of the base, below this outlying border, is visible a very minute 

 transparent spike. 



Lagena. vulgaris, Williamson, var. alato-marginala, Nov. (Fig- 44.) 



Shell symmetrical, fiask-shaped, occasionally somewhat elongated. Walls sparsely 

 scattered over with smaU granules. External neck short, sometimes formed by the 

 gradual tapering of the shell-walls, or more abruptly inserted. Internal tube short. 

 Sometimes the diameter of the flask is widest below the middle, or the walls become 

 more straight, while the base is gently rounded. The periphery of the shell is enc( 

 passed by a narrow thickened keel, which is sometimes transparent or some\^ 

 granulated (fig. 44), and disappears about halfway up the neck. Along the sides of the 

 neck appears a second pair of marginal outgrowths, which, originating at the summit of 

 the neck, pass down its two sides over the before-mentioned keel, and terminate some- 

 what abruptly at some pomt along the anterior half of the sheU. These wing-lil^e 

 processes are crowded with small granules along their inner margin, their outer border 

 remaming of glassy transparency. 



hat 



LiGENA VTJLGAuis, WiUiamson, var. clamito-marginata, Nov. (Fig. 45.) 



SheU ovate, very sUghtly compressed, transparent, tapering slightly towards bo^ 

 ends, rounded at the base, and narrowing anteriorly into a short wide neck, at th 

 summit of which is situated the aperture, surrounded by a thickened rim. In %'^f^ 

 n^Z 'T^'^t '"''^^^'^ " ^^^^^*V ^^^S^^ " soda-water-bottle." Internal tube 

 ZZ:T^X^\^^^^^^^ ^^"-' ^-d «%l^tly widening towards its free end. 



EhoU n . r > ''"^ '"^^I^^-^^ l--^^^form ^^ keels," which encompass 

 Cst f d T' T"f ^"'* '^^^^ '''' '-'^'^^ ^-t^-^1 % the middle one hem 



largest, and projectmg furthest from the flask 



the 



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gtbe i 



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