•I 

 abstracts: zoology 533 



thruout Cambodia and also occurs in Cochinchina, central Laos and 

 eastern Siam. 



Feronia lucida Scheff. is transferred to this genus, becoming Feroni- 

 ella lucida (Scheff.) Swingle. Maude Kellerman. 



ZOOLOGY. — -Revision of the crinoid genus Himeromeira. Austin Ho- 

 BART Clark. Proceedings of the U. S. National Museum, 46: 

 279-289. 1913. 



This paper includes a history of the genus, a list of all the references 

 to the included species, correctly identified, a key to the species, a list 

 of the six species with the synonymy, range and depth of each, and 

 a discussion of the phylogenetical interrelationships within the group. 



This genus differs from the more closely related genera in having the 

 proximal or lower pinnules very much enlarged, with the first the longest 

 and the following decreasing in size. There are three specific groups 

 within the genus of two species each, distinguished by different stages 

 in the specialization of the lower pinnules. In the first, least special- 

 ized, group thes^ pinnules are scarcely stouter than in the allied genera, 

 but they are long and flagellate, the first being the longest. This group 

 ranges from the East Indies to the Persian Gulf. In the second group 

 the lower pinnules are very stout, but they possess a flagellate tip. This 

 group ranges from the East Indies to the Maldive Islands. In the 

 third, most specialized, group the lower pinnules are extremely stout, 

 and end abruptly without a flagellate tip. This group occurs from the 

 Moluccas and the Philippine Islands to the Mergui Archipelago. In 

 all of the three groups the more specialized of the two species occurs 

 in the Malay Archipelago. A. H. C. 



TECHNOLOGY. — The metric carat. Bureau of Standards Circular 

 No. 43. 

 After July 1, 1913, the metric carat of 200 mgms. is recognized as the 

 standard of weight for diamonds and other precious stones and this 

 standard will be used in the certification of all carat weights submitted 

 to the Bureau after that date. The Treasury Department also adopted 

 this standard on the same date for use in the customs service in levying 

 the duties on gems. The change from the former uncertain and in- 

 definite carat weight, usually equal to about 205.3 mgms., to the defi- 

 nite and impler metric carat was facilitated in the United States by the 

 joint action of all the large dealers in diamonds, pearls and other pre- 

 cious stones, who, reahzing the chaotic condition due to the various 



