958 American Work on Recent Mollusca in 1881. [December, 



Mr. Upson also contributes hints to collectors, and offers prizes 

 for the best collections made by children of the public schools. 



It will be seen that this little miscellany is by no means with- 

 out interest, but worse typographical blunders than those which 

 occur in it are rarely to be found, and the editor has included an 

 account of " coon oysters " on the coast of Florida, clipped from 

 some exchange, under the head of Icthyology ! 



Descriptive and Systematic Papers. — As usual, the recorder finds 

 it difficult to assign many papers to any of the definite heads 

 used in this record, since they combine descriptive and other 

 matters under one title, and the recorder's time and facilities do 

 not permit him to attempt any exhaustive analysis like that of 

 Professor von Martens in the Zoological Record. Still the rough 

 arrangement here adopted is not without a certain use, and for 

 that reason has been retained. 



" On the genera of Chitons," by W. H. Dall (Proc. U. S. Nat. 

 Mus., i88r,pp. 279-291, Dec). In this article the writer has 

 given brief but sufficient diagnosis of all the divisions of the 

 Chitonidae recognized by the late Dr. Carpenter and himself, both 

 recent and fossil. All the groups are restricted, some here first 

 characterized, but most of them have heretofore been made pub- 

 lic. In the present arrangement all are brought together in their 

 systematic relations, and their chief characteristics tabulated. 

 The writer observes, " with the above data and those comprised 

 in my report on the Limpets and Chitons of Alaska, students 

 should be pretty well able to refer any Chiton of whose charac- 

 ters they have made themselves masters, to its proper place in the 

 general classification." The following names are proposed for 

 Palaeozoic Chitons on the authority of Dr. Carpenter's MSS., and 

 should be credited to him. Chonechiton, Pterochiton, Loricites 

 and Probolasum. Cymatochiton Dall, is proposed for Cymato- 

 dus Carpenter, preoccupied in vertebrates. 



Among recent genera and subgenera hitherto only in MS. or 

 imperfectly characterized, diagnoses are given of Deshayesiella 

 Cpr., Callochiton Gray, Stereochiton Cpr., Leptoplax Cpr., 

 Spongiochiton Cpr., Callistoplax Cpr., Angasia Cpr., Ceratozona 

 Dall (for Ceratophorus Cpr., non Diesing, 1850), Pallochiton 

 Dall (Hemphillia Cpr., non Binney), Fannettia Dall (Fannia Gray, 

 non Robineau-Desvoidy, 1830), Sclerochiton Cpr., Lucilina Dall 

 (Lucia Gld., non Swainson, 1833), Francisia Cpr., Dinoplax Cpr., 



