ACADEMY OF NATURAL SCIENCES. 27 



7. MYRIAPODS AND ARACHNIDANS. 



The collection of centipedes, millipedes, and spiders, is placed 

 in the east basement-room. 



It contains 27 species of myriapods, and 34 species of arach- 

 nidans, in alcohol, besides 9 dry specimens. 



This department is indebted for contributions to Dr. Goheen, 

 Mr. Cassin, Dr. Leidy, and Dr. Goddard. 



8. CRUSTACEANS. 



The crabs are placed in the east basement-room. 



According to the catalogue of Professor Lewis R. Gibbes, of 

 Charleston, S. C., published in vol. 5, p. 22 (March, 1850), of the 

 "Proceedings of the Academy," the collection contained 175 

 species of 68 genera. But during the past year additions have 

 been made by Mr. McAndrew and Messrs. E. and C. Wilson ; 

 and in February, Dr. T. B. Wilson presented 614 specimens of 

 230 species, which were part of the collection of M. Guerin 

 Meneville, of Paris ; and in December, 1851, another portion of 

 the collection, consisting of 868 specimens, belonging to 183 

 species of 53 genera. 



At this time, the Museum contains 2,054 specimens of 980 

 species of crustaceans, of which 46 are in duplicate. They have 

 been classed, and a catalogue of them has been completed by 

 Dr. R. Bridges. In addition to those referred to, there is a very 

 large number of specimens in store for exchange. 



Of cirrhopeds (barnacles, of various kinds) there are 103 dry 

 specimens, and 10 jars with specimens in alcohol, including 86 

 species. The principal donors to this department are Dr. C. 

 Nicholson, Dr. R. E. Griffith, Dr. Ruschenberger, Dr. T. B. 

 Wilson, Dr. Leidy, and Mr. Nuttall. 



9. ANNELIDANS. 



The collection of worms, which contains 77 species of hel- 

 minths in alcohol, and 3 dry preparations, is placed in the east 

 basement-room. Many of these were formerly in the cabinet of 

 Prof. C. S. Rafinesque. The principal donors are Dr. Goheen, 

 Dr. Goddard, Dr. Leidy, and Mr. Cassin. 



