/ ^ p z^.
ABAEOSTERNUS. 161 . ,
■ .,v(\
ON THE GENUS ARAEOSTERNUS de M.
BY
I am sorry to have to aimounce that the geuus Arueo-sternus, which T described some time ago as uew (Notes from the Leyden Museum, Vol. Ill (1881) p. 131, ami in Dutch in the: Tijdschrift voor Entomologie, Vol. XXV (1881/82) p. 1; pi. 1 and 2), is identical with the geuus Palinurellus, described by Prof. Ed. von Martens in 1878 as a new form of the family of Loricata in the : »Sit-zuugsberichte der Gesellschaft naturforschender Freunde zu Berlin, 1878, pag. 131quot;. Being myself acquainted with the genus Palinurellus by the diagnosis which Dr. George Pfeffer has given in his treatise: » Die Pauzerkrebse und die Clypeastriden des Hamburger Museums, mit 1 Taf.quot;, published in the »Verhandlungen des naturwisseuschaftlichen Vereins zu Hamburg, 1880quot;, I was the more surprised of this fact, to which Prof, vou Martens called my attentiou after 1 had sent him a copy of my Dutch description and figures of the genus AvcLeosternus. Unfortunately an im-portant slip of the pen occurs in Dr. Pfeffer's diagnosis, the author describing the sternum as being »lialb so lancj als breitquot; instead of »halb so breit als langquot;. 1 therefore supposed Palinurellus to be quite a different genus and created the new name of Araeosternus for the Indian animal.
Our Indian form however, which should henceforth be
Notes trom the Leyden Museum, quot;Vol. IV.
11
ARAKOSTERNUS.
called Palinurellus loienecM, is undoubtedly a distinct species different from the American Palinurellus Gundlachi, described by von Martens and afterwards by Pfeffer, and may, I believe, be distinguished from it by its larger size and by the fifth pair of the ambulatory legs not being provided with a rudimentary hand.
I may finally be allowed to remark that the description of F. Gundlachi, given by Prof, von Martens, is rather short and incomplete and that the learned Professor did not publish a figure of that animal, and so I trust the descriptions and figures given by myself, to which I have above referred, may not be altogether superfluous.
Erlangen, March 2nd, 1882.
P. S. After this note had been sent to the press, I received the «Zoologischer Anzeigerquot; of March 6, 1882. In this number Dr. J. E. V. Boas of Copenhagen shows that Palinurellus has last year also been described by Spenco Bate under the new name of Sijnaxes in the »Annals and Magazine of Natural History. 5th ser., vol. VII (1881) ji. 220quot;. In this paper Dr. Boas further adds some remarks concerning the affinities and the phylogeny of this interesting genus of Crustaceans.
Erlangen, March 12tl), 1882.
INiotcfs Ire in tlie Leyclen Museum, 'Vol. Iquot;V.