VINCULARID&. IQI 
1. With Avicularia. 
L. reticulata, Macgillivray ; Busk, lc, p. 66; Johnston, Lc., 
p. 317. Cells ovato-ventricose ; interspaces punctured ; mouth raised, 
with a thin margin and a channelled sinus in the lower lip, two to 
three spines on the upper margin; a central avicularium immediately 
below the mouth; mandible acute; ovicell globular, punctured, its 
opening bounded below by the meeting of its sides above the avicu- 
larium. 
Britain. 
L. angela, Hutton, CM.M.,, p. 96. Cells ovate, immersed, with 
radiating grooves ; mouth sub-orbicular, the lower lip prolonged into a 
deep spout-like projecting sinus; a spoon-shaped avicularium on each 
side just below the mouth, directed horizontally outwards ; ovicell large, 
globose, granular. 
2. With Vibracula. 
L. ciliata, Zinneus; Busk, Lc, p. 75; Johnston, lc., p. 279. 
Cells ovate or sub-globose, surface granular, an elongated acuminate 
vibraculum on one side of the body ; a semilunar pore, frequently on an 
eminence, in the middle of the front of the cell above the centre ; 
mouth with from five to seven spines ; lower lip straight, entire ; ovicell 
globose ; surface granular. 
Britain. Mediterranean. America. Australia. 
L. lyallii, Bwsk, Zc, p. 75. Cells oval ; walls thin, verrucose, or 
rugose ; mouth raised ; margin thickened, with a spout-like sinus in 
front, and five to six spines on the sides and above ; a small vibraculum 
on many of the cells, on one side near the top (Busk.) 
New Zealand. (Lyall.) On Fwcz. 
3. Without Avicularia or Vibracula. 
(a.) With oral spines. 
L. variolosa, Bush, Zc, p. 75 ; Johnston, l.c., p. 317. Cells oval, 
immersed or sub-immersed, usually disposed in linear series ; punctured 
or areolated round the margin, granular (sometimes punctured) in front; 
mouth rounded or sub-quadrangular, with two to four close set spines 
quite at the summit ; lower lip with a projecting mucro and an internal 
bifid denticle; ovicells deeply immersed, also areolated round the 
margin. 
Lyall Bay. Britain. 
L. nitida, Bust, 2c, p76; Johnston, lc, p. 319. Cells ovate, 
‘raised in front ; wall composed of four to nine ribs on each side, the 
spaces between which are filled up by a diaphanous membrane ; mouth 
with four to six oral spines ; ovicell sub-globose, surface granular. 
Britain. hi 
B il. 
