107 
horny, paler beneath; feet pale horny ; the rictorial bristles black, 
strong, nearly as long as the bill. 
Length, 3} inches; of wing, 13; the first quill 3 an inch shorter 
than the second ; third ;4,ths longer than the first ; fourth, fifth and 
sixth nearly equal, the fifth being the longest ; tail, 13 inch; bill to 
frontal plumes, ;3,; to gape, ;4; tarsus, ;>; middle toe and claw, 3%; 
hind ditto, 3; tarsus and hind claw strong. 
Hab. Nepal. (No. 936. Hodgson’s Catal.) 
4, On Runcina Hancock. 
By Dr. J. E. Gray, F.R.S., V.P.Z.S. etc. 
When in company with Mr. William Thompson, I observed Run- 
cina Hancocki in considerable abundance in the pools left between 
the rocks at low tide in Belmont Cove, Weymouth, but only on the 
tufts of Hypnea purpurascens which were infested with Diatomacee, 
which induces me to believe that they feed on these parasitic plants. 
I brought several of them to London, and have since sent some to 
Mr. Alder, who verified the determination. Messrs. Alder and 
Hancock (Ann. and Mag. Nat. Hist. xviii. 289. t. 4), when they 
first described the animal, referred it to the genus Limapontia, 
order Inferobranchiata. Mr. Edward Forbes (Brit. Moll. ii. 611. 
t. CCC) formed it into a genus, placed provisionally at the end 
of the Kolidide, observing that in all probability it represented a 
distinct family. 
The examination I have been able to bestow on the animal induces 
me to agree with Mr. Forbes on this point, and I should be inclined 
to arrange the Runcinide in theorder Pleurobranchiata, near Bullide 
and Pleurobranchide. It has the armed gizzard and the gills of Aply- 
siade. To the excellent description of Messrs. Alder and Hancock, 
I may add, that the tongue-membrane is covered with three longitu- 
dinal series of large transparent teeth, like that of some of the Bullide. 
The central tooth is broad, transverse, with the upper edge reflexed, 
notched in the middle, and with three unequal denticles on each side 
of the middle line. The lateral teeth are rather large, versatile, conic, 
arched, compressed, with an acute tip. The prehensile collar is 
horny, large, rugose, with roundish tubercles. I am somewhat 
inclined to consider the front part of the back, enclosing the eyes, 
which are rather bent up on the sides and separated from the other 
part of the back bya paler colour, as the frontal lobe of the Bullida, 
which is united at this paler part to the true mantle, giving the ani- 
mal the appearance of having a single oblong shield-like mantle. 
The mantle is very hard and tough, but without any appearance of 
a shell or of spicula. 
