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PACIFIC SCIENCE, Vol. XXII, April 1968 
(A) does increase as the building sites become 
more restrictive. In my Figure 14 the area 
within the dotted outline indicates the extent 
of the broadened foot (g) . This type of foot 
attachment is encountered when the lorica is 
excessively dorso-ventrally flattened. 
The color is light-green to grey-green. 
Parafolliculina violaceae (Giard, 1888), Dons 
gen. (see Hadzi, 1951:188 and Silen, 
1947:66). 
Folliculina violaceae Giard, 1888:315. 
Parafolliculina violaceae Dons, 1913. 
Parafolliculina violaceae was first observed at 
Tatokushima, June 19, 1965 on practically 
everything collected, and, moreover, it was the 
most abundant folliculinid in Ago Bay. Because 
P. violaceae has been adequately described by 
many workers, only findings pertinent to the 
present study will be given here. Wide varia- 
tions were observed in peristomal lobes (Fig. 
15 a) mouth (Jb), vestibule (c) , valves (d), 
nucleus (e), and lorica attachment (/), and 
these variations seemed to be as much the 
result of the site chosen as the age of the 
"colony.” As will be discussed subsequently, 
P. violaceae was one of the first organisms to 
appear on shell collectors and in such instances, 
even when space was not at a premium, the 
position assumed was always vertical. 
The intense, deep red of this species in re- 
flected light has been mentioned by other 
workers. 
Pebrilla paguri Giard, 1888: PL 20. 
Folliculinopsis ( Pebrilla Giard) paguri, 
Faure-Fremiet, 1936:356, fig. 6. 
Pebrilla paguri (Fig. 15 A and B) was first 
taken at Tatokushima, September 13, 1965 from 
the dorsal side of the telson, uropods, and last 
two abdominal segments of the hermit crabs 
Pagurus lanuginosus de Haan, 1849, and Pa- 
gurus samuelis (Stimpson, 1857). 5 These her- 
mit crabs, at least for the month of September, 
were heavily infested (approximately 85%). 
In such cases of especially heavy infestation, 
folliculinids were also found attached to the 
inner, upper region of the shell of Tegula 
5 Kindly identified by Dr. S. Miyake, Kyushu Uni- 
versity, Faculty of Agriculture, Fukuoka, Japan. 
100 p 
Fig. 15. Parafolliculina violaceae. Ventral view of 
partially extended animal showing: a, peristomal lobe; 
b, collarless opening of neck; c, vestibule; d, valves; 
e, spherical nucleus; f, collectoderm. 
