454: Miscellaneous. 
allel with those of Audubon in his ‘Synopsis.’ I would propose as 
an appropriate. English name for this bird, the ‘‘ Long-tailed Black- 
cap Titmouse.” —Jbid. 
Red Colour of the Blood in Planorbis imbricatus. 
By M. pz QuaTREFAGES. 
In examining by transmitted light Planorbis imbricatus, M. de 
Quatrefages has perceived that this little mollusk, very common in 
the soft water of the environs of Paris, has red-coloured blood. With 
a weak magnifying power the liquid is seen to fill the cavities of the 
pericardium and of the ventricle, and at moments to colour the ge« 
neral cavity of the whole body on its lower surface. M. de Quatre- 
fages has not seen any distinct globules in this liquid. Other speci- 
mens, of a very small size, have colourless blood. M. de Quatrefages 
presumes that these are the young of the P. imbricaius, the blood of 
which acquires its characteristic tint only with age; and he remarks _ 
that if this conjecture is verified by observations which he intends to 
continue, it would be exactly the same with these mollusks as with 
the Annelides.—Institut, Jan. 7, 1846. 
INDIAN SPECIES OF PAPILIO, 
To the Editors of the Annals of Natural History. 
Brixton, May 18th, 1846. 
GenTLEMEN,—Having been informed by Mr. Westwood that he 
had written to Dr. Erichson on the subject of my comments upon 
his Report on Entomology for 1842, and having been led to expect 
that an early answer would be received, I delayed replying to Mr. 
Westwood’s communication in your January number. 
From what I have lately heard from Mr. Westwood, it does not 
appear that he has now much expectation of a speedy reply, in fact 
that it may be deferred to the Greek calends, or may perchance have 
fallen on the road, 
Lassaque facta vid, lassaque facta mari; 
and there lies waiting strength to continue its journey. 
This being the case, I must decline to delay any longer a re-asser- 
tion of my belief that Dr. Erichson is in nowise blameable for the 
errors I have pointed out in his Report, but was misled by erroneous 
information from England; at the same time asserting the correct- 
ness of the Ray Society’s version of the passages in question, the 
word Mr. Westwood would translate differently being commonly 
used by German entomologists to signify absolute specific identity, 
—a fact which I am surprised Mr. Westwood could overlook. 
It is equally surprising to me that Mr. Westwood can assert that 
so acute an entomologist as Dr. Erichson could imagine, from my 
description of P. Xenocles, that it was identical with P. Pollue. I 
think it quite as probable for him to suppose that a minute descrip- 
tion of a kittiwake compared with the short Linnean description of 
the jackdaw proved their specific identity. 
I must also beg leave to deny Mr. Westwood’s right to assume, 
from the conversation he refers to, that my remarks were intended 
