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means succeeded in getting a large amount of much needed work done at very little money cost to the Survey.

Prof. Angelo Heilprin, of the Philadelphia Academy of Sciences, took up the study of the fossils from the Tertiary beds which were collected by Dr. Penrose and myself. He has completed the work and sent me a list of his determinations. These, together with the descriptions of such as were undescribed or unfigured, will appear in the Transactions of that Academy at an early day.

Dr. Ferdinand Roemer, Professor in the University at Breslau, Germany, was the first geologist who wrote of the Texas Cretaceous, and his works are still our textbooks in paleontological matters. It was thought best on that account to ask his co-operation in determining and describing the numerous fossils of the Cretaceous. His reply was prompt and favorable, and the third shipment of material is now on the way to him.

In the trip made by Prof. Cummins and myself from Abilene to the Double Mountains in September, 1889, a number of new Nautiloid forms were found, and after they were gotten together in the Museum I forwarded some of them to Prof. Alpheus Hyatt, of the Boston Society of Natural History, for examination. They proved to be of such interest that he has made a study of them in connection with similar forms from Kansas and other places, and has furnished descriptions of all of them, together with accurate engravings, for incorporation in this Report.

Prof. E. D. Cope, of the Philadelphia Academy of Sciences, who has already described many of the fossils from the Permian beds of Texas, has offered his services in the determination of such Vertebrate fossils of that period as we may collect, and has given us such aid as he could in furnishing a check list of those which he has already described.

By the means of such co-operation I have secured for the Survey assistance that will be of greatest value, and have had forms identified which could not be done by the Survey itself in anything like a satisfactory manner.

CHEMICAL LABORATORY.

Soon after the completion of the work required for the First Annual Report, Mr. J. H. Herndon was given field work, as has been stated, in East Texas.

During Mr. Herndon's absence in the field Mr. Magnenat made all