MOLLUSCA. 
659 
Cliinese seas ; hrasiliana (Rang), sydneyensis, sp. n., pi. 7. fig. 81, Sydney ; les- 
80711 (Rang), fei'ussaci (Rang), gra7idis (Pease), a7igasi, sp. n., pi. 8. fig. 86, 
Port Jackson ; so7-ex (Rang), quadi'uta (Sow.), from Algiers; swxilis, sp. n., 
pi. 9. fig. 38, locality unknown ; suhquadx'ata (Gould) *, coxmigei'a^ sp. n., pi. 9. 
fig. 40, Philippines; qxunctata (Cuv.), no7'folkmsiSj sp. n., pi. 10. tig. 42, Nor- 
folk Island ; I'angiaifia (Orb.), vulgaris (Blainv.), margmata (Blainv.), loTigi- 
co7'7iis (Rang), imguifej'a (Rang), yetalifera (Rang). 
Aplysia pxmctata, British, and A, depilans, at Guernsey, Jeffreys, Brit. Con- 
chol, V. pp. 2-8 ; the first figured on pi. 1. fig. 1. 
PlEUROBRANCHIDA5. 
Pleuroh‘a7%chus. Sowerby figures in Reeve’s Conchologia Iconica, vol. xvii., 
the shells of the following few x—plumula (Montagu), permiii (Cuv.), 
aurardiacus (Risso), memh7'a7iaceus (Montagu), pcrforatus (Philippi), pata- 
gonicxls (Orb.), ciirinus (Riippell), and hi'evifrons (Philippi). 
Pl€U7'oh7'a7ichus memh7'anaceus and plumida fully described by Jeffreys, Brit. 
Conchol. V. pp. 0-14 ; the latter figured on pi. 1. fig. 2. 
Plmrobranchm ohlongus (Audouin) described only from the figure in the 
Rescript, de I’Egypte, pi. 3. fig. 1, by Issel, Malac. mar. ross. p. 103. 
RuNClNIDiE. 
Runcma hancocki (Forbes), Jeffreys, Brit. Conchol. v. p. 16, pi. 1. fig. 3. 
NUDIBRANCHIATA. 
In Jeffrey’s British Conchology this order has been worked 
out by the late J. Alder, one of the authors of the well-known 
Monograph of the British Nudibranchiata ; it contains not only 
a condensed abstract from that larger work, but also numerous 
additions. We shall mention here only those species which are 
not described in the Monograph.’^ 
Pleurophyllidia loveni (Bergh), the only British species. Jef* 
freys, Brit. Conchol. v. p. 17, pi. 1. fig. 4. 
P leurophyllidia formosa (Kelaart, as Diphyllidia) from Ceylon, 
externally and anatomically fully described by R. Bergh, Verb, 
zool.-bot. Gesellsch. 1869, pp. 225-244, pis. 1-3. 
Rud. Bergh has published a very elaborate and valuable 
monograph of this family. He describes first the anatomical 
and morphological characters, chiefly from Phyllidia varicosa 
(Lam.), and comes to the conclusion that this family is, in 
shape of body as well as in the majority of the anatomical pecu- ' 
Rarities, allied to the Dorididan, and amongst them especially to 
the genus Doridopsis (Aid. and Hanc.) . The family is, as far 
as we now know, restricted to the western part of the Pacific and 
the great Indian Ocean to the Red Sea. The genera and species 
are the following : — 
* Dr. Gould never published this species. It is not distinct from 
tata (Guv.). Note by G. Tryon, Am. Journ. Conch, v. p. 222< 
