A DESCRIPTION BY SAVIGNY 251 
Family 9.—Pasipheide. 
The rostrum is small or obsolete, the mandibular ‘ palp’ 
two- or one-jointed or wanting. The trunk-legs carry 
exopods. The third, fourth, and fifth pairs are inferior 
in size to the two pairs of chelipeds, the fourth being 
generally smallest of all. 
Three genera are included in this family by Spence 
Bate, and a fourth has been established by S. I. Smith. 
One of these four is represented in British waters. 
Pasipheea, Savigny, 1816, was established in a rather 
casual manner in the footnotes to Savigny’s celebrated 
‘ Mémoires sur les animaux sans vertébres,’ to receive the 
Mediterranean species, Alpheus sivado, Risso, which also 
occurs in tolerably deep water off the coasts of England, 
Treland, and Scotland. Bell says that Savigny gave no 
description of the genus, but he does in fact refer to the 
peculiarity that the appendages of the trunk exhibit exo- 
pods, as in species of Squilla and Mysis. Moreover, when 
insisting on the pediform character sometimes shown by 
the maxillipeds, he subjoins a note that ‘the Alpheus 
Sivado of M. Risso has really twelve thoracic feet em- 
ployed in locomotion.’ Lastly,in a note to the description 
of the maxillipeds of an Amphipod, he observes that ‘in 
Alpheus Sivado, the second joints of the two front cheli- 
peds are united into the form of a lip, a peculiarity all the 
more remarkable for its occurring in only one of the sexes.’ 
Subsequent writers do not appear to have repeated or ex- 
plained this last observation. The figures of this species 
in Risso, in Bell, and in the completed edition of Leach’s 
‘Malacostraca’ (1875), are misleading as to the real 
shape of the animal, which is strongly bent at the middle, 
The mouth organs examined in a British specimen differ 
considerably from those depicted by de Haan for this 
species, hut approach very closely those figured by Spence 
Bate for his Pasipheea cristata from the Fiji Islands. In 
this genus the mandibular palp is wanting. The second 
maxillipeds are quite devoid of exopod, which Spence Bate 
notes as very unusual in the Macrura. Kréyer’s Pasiphea 
