﻿62 MR. F. W. 0. RYMER JONES ON SOME JAVAN DEEP-SEA LAGENiE 



siderably from the ordinary Lar/eme, yet still presenting points of resemblance which are 

 nnmistakahle. 



The general outline of the whole organism is somewhat spindle-shaped — heing very Iom, 

 and gently tapering towards either end, not unlike a pair-oared " outrigger." 



About the middle of the whole length of tho structure is situated the central cavity, 

 which is small, ovate, and compressed, but slightly peaked at its basal end. From the 

 middle of the antenor portion of the flask extends a rery long, slender, and straight tube, 

 which, passing through a second chamber, enters a long straight neck, the orifice of 

 which is sm^rounded by a coronal of short blunt deuticulations. 



This second chamber laps round the anterior portion of the ovate central cavity in the 

 same axial line, its side walls being moderately straight, and its anterior inner wall 

 gently arched, though the outer ones taper into the long external neck. At both sides 

 of the central cavity the walls of this chamber are continued, passing down in the form 

 of a very narrow, blunt, angular ridge, which, encompassing the whole basal half of the 

 central cavity, project in one long flattened and tapering basal apophysis, the ex- 

 tremity of which is solid and slightly blunted. 



On each lateral aspect of the shell are two remarkable lamelliform riblets, one on 



either side, which, emerging from the shell- walls of the foremost cavity, pass down in a 



very narrow ridge, and, extending round the base in two plate-like kyers, reach far 



down the basal prolongation, where they gradually disappear in the more sohd shell- 

 substance. 



This shell, which is unique in my cabinet, unites in its structure the characteristics of 

 the marginate with those of the apiculate series, though the amount of apiculation is 

 exaggerated beyond that of any shell I have seen in the latter group. 



Its walls are semitransparent and smooth, and are perforated with rather coarse pseudo- 

 podial orifices. 



narrow 



Lagena vulgaeis, Williamson, yar. hispida, Eeuss. (Eig. 50.) 



Shell of very variable contour, being sometimes globular, sometimes ovate, or more 



Jrow and elongated ; the base widely rounded. Anteriorly the sheU gently tapers, or is 



produced more or less abruptly into a long slender external neck. The shell-waUs are 



densely covered with thin spines, which are sometimes continued up the neck. In % ^ ' 



lowever, these spines are small, and absent from the neck, which is inserted very abruptly 



mto the chambered portion, and is ornamented throughout ivith a number of pai* 



end th t! '''^'''^ ''"''''P^ *^^ entire neck from its junction with the body to 



A .n^T. 'T'° ''''^^^'' ^^^ ^^^^^^ t^S^ther towards the terminal aperture, 

 less deZi T "' "PP^^^^^^^ is also observable in X. striata (fig. 18), though in 

 ^^^^^^^^^^^ ''''''''''''' ^' ^'<^^^^o-y (Voy. dans TAmer. 3leM 



with flas'^ 



shap^llr,^ till f ^'^ '' ^ "^"^^ brownish white. Occasionally one meets with 



densely covered wL *'''' "^''"^''^ ornamentation greatly modified (the surface 



«lens_ely coyered with mnute 



bein? 



COB' 



■«e«ng lini between .r? ^""^"^ protuberances), and wHcb seem to form » j- 



. ma between the I^yi,,,^ ,^4 ^^^^^^ ^^ ^^^^_ j^^^^^_ ^^^^^ ^, essent* 



