During a long and productive career in paleontology, Rousseau H. Flower (1913-1988) described and figured more than 400 taxa. The bulk of the very significant fossil collection that Rousseau worked with remains at the NMBM&MR in Socorro. Material from these collections continues to be in demand by paleontologists and efforts at the NMBM&MR are intended to make described material available. Every effort is being made to return material Rousseau borrowed from other institutions. The NMBM&MR is also concerned that the results of Rousseau's studies concerned with NMBM&MR collections be preserved in manner as coherent as possible. This is the first notice of transfer of NMBM&MR specimens; material listed herein is now reposited at the Smithsonian Institution. The material listed here was published in 1964 as part of NMBM&MR Memoir 12, The Nautiloid Order Ellesmeroceratida (Cephalopoda). Because of the nature of the collections, the process of identifying described material and checking data against the published record and our internal catalog is difficult and time consuming. In addition, Memoir 12 dealt with a great deal of material. Therefore, the transfer of the remainder of the fossils described in Memoir 12 will be noted at a later date.