Folliculinids of Ago Bay, Japan — Matthews 
241 
125 p 
Fig. 9- Lagotia spirobis. 
A, Ventral view of relaxed animal showing: a, left 
peristomal lobe; b, collarless neck; c, spiral whorl; d, 
neck; e, spherical nucleus; f, lorica; g, foot. 
B, Ventral view of contracted animal showing: a, 
curved, left peristomal lobe. 
may rightfully belong to the genus Lagotia , if 
not, Silen (1947:63) is justified in creating his 
new genus ( An gusto jolliculina ). 
The nucleus (Fig. 9 A, e) is spherical and 
the foot (g) is non-spatulate. As previously 
stated, this material is not a deep blue-green 
but rather a light grey-green to almost colorless. 
Lagotia viridis Wright, 1858. Amend. Fladzi, 
1951:35-42. 
Folliculina viridis Faure-Fremiet, 1936:1152, 
9. 
Folliculina ampulla Dons, 1912:81, fig. C. 
Semi jolliculina boecki Dons, 1913:65. 
Lagotia viridis (Fig. 10 A and B) was first 
taken at Tatokushima, June 19, 1965 from the 
surface of P. martensii and the calcareous tests 
of the acorn barnacle, Balanus amp hi trite Brock. 
The size and shape of the lorica fall well within 
the limits previously prescribed for this species 
(Fladzi, 1951:37). The rather perpendicular 
neck (d) usually has 2 or 3 spiral whorls (c) 
ending just short of the narrow collar (b) but 
no longitudinal stripes. 
The peristomal lobes (Figs. 10 A and B, a) 
are equal, without finger-like projections and 
usually held quite high above the open neck. 
The nucleus (e) is spherical and the foot (/) 
non-spatulate even in highly contracted animals 
(Fig. 10B). 
The color is the typical blue-green of this 
genus. 
Metafolliculina andrewsi Fladzi, 1938, Acta 
Adriat. 2(1): 1-46. 
Metafolliculina andrewsi was first collected at 
Tatokushima, July 19, 1965 on shells of Spi- 
rorbis sp. comprising part of the epifauna of P. 
martensii. Later they were found on the valves 
of Pinna attenuata and Chlamys nobilis also 
taken in Ago Bay. 
Figure 11 is a lateral view of the left side of 
M. andrewsi taken from the epifauna of P. 
martensii. Although measurements vary con- 
siderably from one population to another, none 
are as large as those described by Hadzi (1938) 
nor as small as those described by Andrews 
(1950) for his Carrum Creek (Australia) 
material. Most fall well within the limits ob- 
served by Matthews (1953) for this species 
taken at Waimanalo Creek, Bellows Field, Oahu. 
In the Ago Bay material, the sac (Fig. 11 /) 
is up to 136|i long and lies attached to the sub- 
stratum. The neck (d) , which rises some 200p 
almost perpendicularly from the sac, is rein- 
forced by 6 or 7 well-developed spiral whorls 
(c). The collar ( b ) is only slightly developed 
and beneath it are no indications of longitudinal 
stripes. No valves are present. Extensions are 
common. Common also are the presence of 
"new” swimmers locating in "abandoned” 
loricae; and it was not uncommon to see two or 
three completely metamorphosed folliculinids 
occupying the same lorica. 
The peristomal lobes ( a ) are long and slender 
and for the most part not provided with finger- 
like processes. When present, these projections 
