424 Miscellaneous. 
length; pleure densely porous, terminating in a blunt process, 
which is tipped with 4 or 5 small spines ; sternite long and narrow, 
posteriorly attenuate, with truncate hinder edge, its basal width 
about two thirds of its length ; legs long and slender, nearly four 
times the length of the head, the segments cylindrical and about 
four times as long as wide; femora armed with about 14 small 
spines, 3, 5, 2 in three longitudinal rows on the inner surface and 
3, 3 in two rows on the external half of the lower surface ; the 
femoral process armed with from 4 to 10 small spines; no tarsal 
spur, claws basally spurred. 
The rest of the legs long and slender, with a tarsal spur. 
Measurements in millimetres.—Total length 163, of antenna 37, of 
anal leg 41; width of head 10°5, length 10; width of twelfth 
tergite 14, of twenty-first 8. 
Loc. New Georgia (Solomon Islands). 
A couple of specimens of this species were obtained by Commander 
Barker, R.N., of H.M.S. ‘Penguin.’ The second specimen is a 
little smaller than the type, being 145 millim. long, and much 
more uniformly chestnut in colour. 
In its general features this handsome new species presents con- 
siderable resemblance to the cosmopolitan S. subspinipes of Leach, 
but may be at once recognized by the spine-armature of its anal 
legs, the former species having only two or three spines on the 
lower surface of the anal femora and only three or four on the inner 
surface. It also has but five or six teeth on the precoxal plates of 
the maxillipedes, whereas in S. metuenda there are a large number 
of minute more or less obsolete teeth on these plates. In this respect 
S. metuenda would seem to approach S. polyodonta, Daday (Term. 
fiizetek, xvi. p. 109, pl. v. fig. 7 &e.), from New Guinea; but the 
latter has the anal femora unarmed, as in the variety of S. de Haaniwt 
named tnermis by Newport. 
MISCELLANEOUS. 
On the Status of the Names Aplysia and Tethys. 
By Henry A. Pivssry. 
In the course of my studies on the ‘“Sea-Hares,” preliminary to 
the preparation of a monograph of this group of tectibranch mol- 
lusks for the ‘ Manual of Conchology,’ my attention was early forced 
to the fact that in Linnzeus’s tenth edition of the ‘ Systema Nature’ 
the genus Tethys was proposed for the animal now known as 
Aplysia, and included nothing else. Moreover, by the terms of the 
generic diagnosis, such creatures as that known as Tethys in modern 
times are excluded. 
In the twelfth edition of the ‘Systema’ Tethys is given a com- 
pletely different meaning, and the new term Aplysia (Laplysia) is 
brought forward to include the species of the earlier Tethys. ‘Lhis 
later usage has been accepted by zoologists until the present day. 
