1904-5.] Report on Medusae found in Firth of Clyde. 
773 
The following species described in Forbes’s monograph are 
probably stages in the development of Phialidium temporarium : — 
Tliaumantias thompsoni, Forbes, p. 49, pi. xi. fig 5. Sixteen 
tentacles. The third stage in development. 
Lamlash Bay, Herdman (1880). 
Thaumantias sarnica, Forbes, p. 48, pi. xi. fig. 4. Twenty 
tentacles. 
Thaumantias pileata , Forbes, p. 47, pi. xi. fig. 6. Twenty 
tentacles. 
Thaumantias inconspicua, Forbes, p, 52, pi. viii. fig. 3. Sixteen 
to twenty tentacles. 
Thaumantias p>unctata , Forbes, p. 53, pi. x. fig. 1. Thirty-two 
tentacles. 
Thaumantias lineata , Forbes, p. 48, pi. xi. fig. 1. Thirty-six 
tentacles. 
As Forbes has omitted in his descriptions and figures the 
marginal sense-organs, which are most important for the de- 
termination of the species, it is impossible to be absolutely certain 
about their identification. The six species given above were taken 
by Forbes in localities far apart, and this probably strengthened 
his view that they were distinct species, and prevented him from 
realising that they were only stages belonging to a single species. 
Saphenia mirabilis, Wright. (Table I. 19.) 
Saphenia mirabilis , Browne, 1896, p. 493, pi. xvii. 
In 1901, a single specimen was taken on 18th July and another 
on 20th July. This species is not uncommon during the summer 
months on the south coast of Devon and Cornwall, and is also 
often found on the west coast of Ireland. 
Tiaropsis multicirrata (Sars). (Table II. 7.) 
Tiaropsis multicirrata, Browne, 1900, p. 728. 
In 1902, a few early and intermediate stages were taken 
between 22nd March and 12th April. 
Description of the smallest specimen, about 1 mm. in length and 
width: — The umbrella is bell-shaped and has thin walls. Velum 
narrow. The stomach is very small, with a quadrangular base ; 
