668 MR. W. HARPER PEASE ON NEW LAND SHELLS. [Dee. 13, 
TANAIS LORICATUS, 0. 8. 
The only specimen in the collection is imperfect. The first segment 
of the pereion appears to be imperfectly fused with the cephalon. 
Inferior antennee scarcely half the length of the superior. First pair 
of gnathopoda having the propodos ovate ; dactylos short and tumid, 
shorter and less pointed than the digital process of the propodos. 
Pereiopoda having the first three joints short and broad, being affixed 
to the side of the pereion like plates of mail (hence the specific name) ; 
they terminate in short pointed dactyli, and have the propodi armed 
with two lateral rows of strong, black, pointed teeth. 
This species was taken from the hollow of a sponge dredged in 
Esquimalt Harbour, at the depth of about ten fathoms. 
Tonr CORNUTA, n. 8., Bate. 
The male differs from the description of the European species 
chiefly in having the caudal extremity terminating obtusely, and in 
having shorter antenne. 
The female has the antero-lateral hornlike process of the cephalon 
curved posteriorly. The pereion is not quite equilaterally developed. 
The cox of the four anterior pairs of pereiopoda are round, and all 
attached to the antero-lateral margin of the segments of the pereion. 
The coxze of the three posterior are the larger, and produced poste- 
riorly to a point. The pleopoda are long, and fringed with arbores- 
cent branchize. 
This is the only species known, besides that taken by Colonel 
Montagu on the southern coast of England. 
Length, male }, female ? of an inch. 
Taken attached to the branchia of Callianassa longimana. 
4. Descriptions or New Species oF LAND SHELLS P2OM THE 
IsLANDS OF THE CENTRAL Paciric. By W. Harper Pease, 
Esa., or Honotutv. (Communicatep sy Dr. P. P. Car- 
PENTER.) 
Mr. Pease having sent to me specimens of most of those land 
shells of the Central Pacific Islands which he regards as new, they 
have been carefully compared with the species of Pfeiffer, Reeve, 
Gould, and other authors in the Cumingian Collection. Those which 
Mr. Cuming regards as new are here described : a list of the re- 
mainder, with the synonyms as determined by Messrs. Cuming and 
H. Adams, is given for the sake of the many naturalists in this and 
other countries who have received them under Mr. Pease’s MS. 
names. It must be remembered that Mr. Pease may have reasons 
for regarding them as distinct, which do not appear on the face of 
the specimens. Of the shells placed at my disposal by Mr. Pease, 
the first has been presented to the Cumingian Collection, the second 
to that of the Smithsonian Institution.—P. P. C.] 
