48 REPORT OF NATIONAT- MUSEUM, 1923. 



Marine Invertebrates. — Preeminent among the year's accessions 

 are two collections of prime importance. The first one consists of 

 226 microscopic slides of Opalinid ciliate infusorians from Prof. 

 Maynard M, Metcalf, of the Orchard Laboratory, Oberlin, Ohio, 

 being the first set, including 144 types of new species, upon which 

 was based his monograph of the family which has recently been 

 published by the Museum as its Bulletin No. 120. The other is a 

 transfer from the U. S. Bureau of Fisheries of a collection of Philip- 

 pine sponges, including 57 types of new species described by Prof. 

 H. V. Wilson in his report on the sponges taken by the Albatross 

 Philippine Expedition in 1907-1910. From Dr. H. L. Shantz, 

 U. S. Department of Agriculture, was received 274 samples of fresh- 

 water plankton, material upon which his paper "A biological study 

 of the lakes of the Pike's Peak Region" was based. Similarly 

 there was obtained from Dr. O. W. Hyman, University of Tennes- 

 see, 37 specimens and numerous larvae of Pinnotherid crabs, being 

 the material upon which his paper entitled, " Studies upon larvae 

 of the family Pinnotheridae " is based. In exchange the Division 

 obtained from Prof. W. M. Tattersall, University College of South 

 Wales, Cardiff, 75 lots of Crustacea, comprising 11 species, 46 speci- 

 mens of isopods; and 64 species, 838 specimens of amphipods, all 

 from the Irish Sea. An important collection of terrestrial isopods 

 from central and southern * Europe, including representations of 

 many species not hitherto represented in our collections was obtained 

 by purchase. An unusually large number of smaller accessions 

 resulted in the addition of many species new to our collections, too 

 numerous for listing here. Cooperation by the Consular Service 

 is acknowledged as resulting in the receipt of 125 specimens of in- 

 vertebrates, mostly Crustacea, collected by Jesus G. Ortega and 

 Henry Notton, through the kind offices of W. E. Chapman, American 

 Consul at Mazatlan, Mexico. 



Mollushs. — The late John B. Henderson, formerly a Regent of the 

 Smithsonian Institution, purchased for this division the General 

 Evezard Collection of mollusks, containing 11,399 specimens, in- 

 cluding a large number of types, for the study series and in the neigh- 

 borhood of 2,000 specimens for the duplicates. This collection was 

 brought together by General Evezard personally during the twenty- 

 eight years that he lived in western India, at a cost of about £2,000. 

 He was interested particularly in mollusks, and did much of his col- 

 lecting himself. The collection contains some of the finest material 

 this division has ever received. It is rich in mollusks from localities 

 poorly represented here, particularly India, South America, and 

 the South Sea Islands. ^Vliile Mr. Henderson was engaged upon 

 a study of the West Indian landshells, he borrowed from Dr. 

 George H. Clapp, Sewickley, Pa., a large series of West Indian land- 



