DurrpEn—Wotes on the Hydroida and Polyzoa. 329 
Log 42, 94 miles south-west of Castletown. Berehaven; depth, 
37% fathoms.—(R. I. A.).’ 
Perigonimus (?) inflatus, n. sp. 
(Pl. XIV., fig. 4.)! 
Stem erect, simple ; polypary horn-coloured, smooth, firm, form- 
ing above a thin, delicate, cup-like enlargement, within which the 
polypite is largely retractile. 
Polypite large, much swollen in contraction, borne on a neck~- 
like extension of the ccenosarec; body generally pendent; ten- 
tacles 8; gonophores unknown. 
In the absence of the gonophores, this form can only he 
referred provisionally to the genus Perigonimus; but there can 
be little doubt, from a comparison of it with other species, that 
it belongs to the genus. I have found numbers of specimens 
rising from stolons creeping over other zoophytes, such as Sertularia 
abietina. The stem appears to be always simple, and the polypary 
over the greater part is rather thick and firm; but a little below 
the base of the polypite it thins more or less suddenly, and extends 
to form a delicate covering to the neck-like prolongation of the 
coenosare and the body of the polypite. This thin portion is 
somewhat coated with fine earthy matter. Little of this occurs 
on the thicker portion of the polypary. Towards the base the 
stem is a little wrinkled. The natural position of the polypite 
appears to be that of drooping from the neck-like portion. 
This species is most closely allied to the Perigonimus nutans of 
Hincks,” especially in the “large elevated polypites and pendent 
habit,” which Mr. Hincks regards as the striking feature in his 
species. It differs from it, however, in that the polypary extends 
to form a cup-shaped enlargement, within which the polypite is 
retractile, in the greater firmness of the polypary, and in the slight 
wrinkling towards the base. It does not appear to be such a 
1 In the present communication I have also recorded some of the examples which 
were collected by the Royal Irish Academy Survey of the South-west Coast of 
Ireland, 1885, 86, ’88. For the Report on the Hydroida of these collections, see 
Proc. Roy. Irish Acad., 3rd Ser., vol. iii., No. 1. 
* Ann. and Mag. N. H., Ser. 4, vol. xix., p. 149, pl. xii., fig. 1. 
SCIEN. PROC. R.D.S., VOL. VIII., PART IV 2B 
