FAUNISTIC NOTES AT PLYMOUTH DURING 1898—4. pity 
had numerous buds arising from the tentacle bundle; it was taken 
on a few occasions only during April of this year. 
Among Calyptoblastic Hydroids, I may record that Diphasia 
rosacea 18 common on stones in Millbay Channel. 
The Campanularian meduse offer great difficulties in the way of 
satisfactory identification, owing to our ignorance of the limits of 
growth and modification of which so many of the medusz are capable 
after liberation ; I will therefore content myself with descriptions in 
several cases. Several specimens of a large, delicate, and perfectly 
transparent medusa were dipped up from the boat’s side on October 
6th, 1892, which I found, upon examination, to be the Irene pellucida 
of Will, redescribed by Claus in the Arbeiten des Zoologisches Inst. 
m Wien, iv. ‘This medusa is the Geryonopsis pellucida of Forbes’ 
monograph (p. 40), but is altogether distinct from the species 
described by Haeckel under the name Irene pellucida. The umbrella 
was depressed and broad, 2°4 cm. in diameter. The gonads extended 
8 mm. from the edge of the umbrella, ¢. e. only two thirds of the radius, 
There was a distinct peduncle (Magenstiel), conical in form, 5 mm. 
long. ‘The oral lips, four in number, were produced and fimbriated. 
The tentacles, sixty-four in number, were very regularly disposed (4 + 
4+ 8+ 16+ 82). The primary and secondary tentacles were as long 
as or longer than the oral lips, and the tentacles of the remaining 
orders diminished regularly in size and length according to their 
respective orders. Hach tentacle consisted of a basal bulb and a 
terminal filament, often coiled. There was no trace, however, of true 
“spiral cirri.”” In addition there was also a variable number of 
tentacle rudiments, devoid of filaments, in positions which indicated 
the commencing formation of a sixth order of tentacles, sixty-four in 
number. Otolithic vesicles were present, usually one between every 
two adjacent tentacles, never more. Every tentacle was provided 
with an excretory pore, opening into the umbrellar cavity at the tip 
of a tubercle placed just above the velum. ‘The species differs from 
the Irene pellucida and Irene viridula of Haeckel’s monograph in the 
absence of spiral cirri, From the former it also differs in the fim- 
briation of the oral lips, in the absence of a conspicuous constriction 
between peduncle and stomach, in the regularity of the tentacles, 
and in the distal position of the gonads on the radial canals. From 
the Geryonopsis delicatula of Forbes it differs in the regularity of the 
tentacles, in the absence of a conspicuous contraction of the peduncle, 
and in the smaller size of the oral lips and of the velum. 
In addition to Laodice cruciata (= Thaumantias pilosella of Forbes 
and the “Irene viridula” of Mr. Bles’s Notes on the Plankton of 
Plymouth, this Journal, IT, 1892, p. 342), which is common at Ply- 
mouth every summer, numbers of an Jrene-like Phialid were taken 
