MUSEUM OF COMPARATIVE ZOOLOGY. 19 



REPORT ON INVERTEBRATE PALAEONTOLOGY. 



By P. E. Raymond. 



The Curator spent the greater part of the year in the identifi- 

 cation and labeling of the contents of the 16 boxes of fossils col- 

 lected during the Shaler Memorial Expedition of 1921. One of 

 the important items is the large series of well-preserved Cambrian 

 fossils from northeastern Alabama, representing about 25 species, 

 all new to the collection. Among them is the pygidium of a 

 trilobite retaining its color-pattern, a specimen unique among 

 trilobites, and also the most ancient known example of a fossil 

 showing color-markings. 



The material obtained from the Ordovician of eastern Tennessee 

 and northern Alabama supplements that of the two former trips 

 to the Appalachians, so that the little-known Ordovician faunas of 

 the Great Valley from Pennsylvania to Alabama are now well 

 represented. This collection contains many undescribed species, 

 some of which have been studied. Articles descriptive of the 

 sponges and trilobites have been prepared by the Curator, and 

 Mr. Bradford Willard has undertaken the study of a part of the 

 brachiopods. The fossils from central Tennessee and central 

 Kentucky led to a reconsideration of the correlation of the Ordo- 

 vician strata of the two areas, and a paper by the Curator, pro- 

 posing a new scheme, is now being published in the Bulletin 

 of the Geological Society of America. 



Mr. T. H. Clark has continued his work in the vicinity of Quebec 

 and Levis, and has presented the Museum with 42 drawers of 

 Ordovician and 7 of Devonian fossils, the greater part of which he 

 has identified and labeled. Many of these proved to be new to 

 science. His most notable specimen is a small appendage of a 

 trilobite, presenting some features previously unknown in the 

 group. This he has recently described in the American Journal of 



