Folliculinids of Ago Bay, Japan — Matthews 
bottle-green in transmitted light. The peristomal 
lobes {a) are long (up to 118|a), without 
finger-like projections and are carried high 
above the almost collarless (b) distal end of the 
neck. 
Folliculinopsis annulata Faure-Fremiet, 1936, 
Mem. Mus. Hist. Nat. Belg. (Ser. 2) 
3:1136-1137, fig. 2. 
Alexandria karagjorgjevici Hadzi, (1937) 
1938, Acta Adriat. 2(l):8-25, figs. 1-5. 
Folliculina karagjorgjevici Hadzi. Silen, 1947, 
Ark. Zool. 39(12) :49-53, figs. 52-61. 
Folliculinopsis annulata (Fig. 3 A and B) was 
first taken at Tatokushima, July 6, 1965 on and 
in the calcareous tubes of Spirorbis sp. Whether 
free or crowded, all taper gradually from a 
rounded proximal end (/) to the distal end of 
the neck ( a ), resulting for the most part in a 
long, tube-like lorica with, superficially, no 
sharp line of demarcation between sac and 
neck. While certain necks are curved in con- 
formity to attachment sites, most are surpris- 
ingly straight and held at an angle above the 
substrate. 
What at first appears to be a cone is, in reality, 
two valves (d) shaped like a roof, whose ridge- 
pole (marking the position of closure) runs 
diagonally across the lorica, separating sac (/) 
from neck {b, c). The sac leng-h is almost uni- 
formly 275(jt; the length of the neck varies only 
from 475 p, to 500p. Neck widths vary from 38p 
to 50p. Although no collars, longitudinal stripes, 
or spiral whorls are observed, the neck is charac- 
terized by light, "clean” bands ( b ) and dark, 
"dirty” bands (c), the latter formed by an 
accumulation of foreign, adhering grains. 
The animal is further characterized by its 
long, narrow, peristomal lobes which, even in 
the contracted condition often reveal prominent, 
finger-like projections ( e ). However, none of 
these projections terminates in swollen drop-like 
bodies (Silen, 1947:50, fig. 59^). Size differ- 
ences are frequently observed but the left 
peristomal lobe is as frequently reduced as the 
right. 
The nucleus (g) is always moniliform and 
consists of 7-9 components. 
The foot (7>) is non-spatulate. Color varies 
from grey -green to almost colorless; however, 
235 
f - — — 1 
2 75 p 
Fig. 3. Folliculinopsis annulata. 
A, As viewed ventrally showing: a, distal end of 
neck; b, "clean” bands of neck; c, "dirty” bands of 
neck; d, diagonal valves; e, peristomal-lobe projec- 
tions; f, sac; g, moniliform nucleus; h, non-spatulate 
foot. 
B, As viewed ventro-laterally showing empty lorica 
with valves d. 
both body proper and peristomal lobes possess 
pigment granules which may appear either red 
or green, depending on the light source used. 
