THE NAUTILUS. 61 



author now considers T. rudis Reeve as a young stage of T. 

 gigas L. C. W. J. 



OBSERVATIONS ON THE HABITS OF COCHLITOMA ZEBRA VAR. 

 PULGURATA (PFR.) AND C. Z. VAR OBESA (PFR.) IN CONFINE- 

 MENT. By Jane Longstaff, F.L.S., F.G.S. Proc. Zool. Soc 

 Lond., 1921, 379. A specimen of C. z. obesa lived 6% years. 

 An interesting account is given of the reproduction, food 

 and habits. Three plates. 



A NEW CLASSIFICATION OF THE SHIPWORMS AND DESCRIP- 

 TIONS OF SOME NEW WOOD-BORING MOLLUSKS. By Paul 

 Bartsch. (Proc. Biol. Soc. Wash., vol. 34, pp. 25-32, March, 

 1921.) This is a preliminary paper offered in advance of a 

 monograph on the American sliipworms. Two new sub- 

 genera of Bankia (Neobankia and Bankiella) and three new 

 subgenera of Teredo (Teredothyra, Teredops and Teredora) 

 are proposed and five new species described, also two new 

 species of Xylophaga. C. W. J. 



NEW MARINE MOLLUSKS FROM THE WEST COAST OF AMERICA. 

 By Paul Bartsch. (Proc. Biol. Soc. Wash., vol. 34, pp. 33- 

 40, March, 1920.) Nine new species are described belonging 

 to the following genera: Turbonilla, Odostomia, Cerithiopsis, 

 Alvania and Vitrinella. 



TERTIARY MOLLUSCA FROM THE LARES DISTRICT, PORTO Rico. 

 By Bela Hubbard. (Scientific Survey of Porto Rico and the 

 Virgin Islands, vol. iii, pt. 2, pp. 79-164, pis. 10-25, 1920; 

 N. Y. Acad. Sci.) An exhaustive treatise on the Tertiary 

 fossils of that region, representing various beds of the Oligo- 

 cene. Some 66 new species and varieties are described and 

 figured. 



EGG-CAPSULES OF THE TEN-RIBBED WHELK. By C. W. John- 

 son. (Boston Soc. Nat. Hist., Occasional Papers, vol. 5, pp. 

 1-4, pi. 1, May, 1921.) 



MOLLUSCA OF NORTH DAKOTA. By Mina L. Winslow. (Oc- 

 casional Papers, Mus. Zool. Univ. Mich., no. 98, pp. 1-18, 

 1921.) 



SHELLS FROM ALCONA, OSCODA AND CRAWFORD COUNTIES, 

 MICHIGAN. By Mina L. Winslow. (Occas. Papers, Mus. 

 Zool. Univ. Mich., no. 102, pp. 1-5, 1921.) 



