140 



SCIENCE 



[N. S. Vol. XLIX. No. 1258 



fisJi fauna under his finger tips, literally: and 

 if Eastman were sought for at this time, he 

 would have been found at the top of the 

 Agassiz Museum in the center of a labyrinth 

 made up of tiers of great trays of fossils : and 

 the visitor would come away with the im- 

 pression that there was something- almost un- 

 canny in the skill with which Eastman could 

 call up out of the mud-colored shales these 

 primeval creatures, for their membra dis- 

 juncta would be made to fit in place so quicldy, 

 so faultlessly, and sometimes with so audible 

 a click that one could almost picture the fish 

 coming to life in its tray. 



From, the study of placoderms, Eastman's 

 studies extended naturally to the contempor- 

 ary lung-fishes and ganoids, and to our knowl- 

 edge of these early forms he made numerous 

 contributions. Now and again he would hark 

 back to the group of sharks, trying ever to 

 bring order into this primitive and difficult 

 group. Port Jackson sharks, with their cu- 

 riously modified dentition, which enabled 

 them to crush the shells of shellfish, suggested 

 new lines of evolutional changes, and his 

 work on these forms from Illinois, Iowa, Mis- 

 souri, Kansas and Nebraska showed new se- 

 quences and enabled him to fill out the gaps 

 in their history. Certain of these early sharks 

 became so similar to lung-fishes in their denti- 

 tion, that, on this evidence alone, the two 

 great groups of fishes might readily have been 

 merged. 



During the last decade of his work, East- 

 man's attention was drawn more closely to 

 types of modern fishes. This was perhaps due 

 to the fact that he had been able to bring to 

 this country the famous collection of a 

 Belgian paleontologist, de Bayet, and install 

 it in the Carnegie Museum at Pittsburgh. 

 Upon the fishes of this collection, especially 

 those from northern Italy (Monte Bolca) he 

 published a number of beautiful memoirs. 



In matters relating to the phylogeny of 

 fishes, Eastman was conservative. Thus, fol- 

 lowing Smith Woodward, he maintained that 

 the group of placoderms which the latter de- 

 fined as Arihrodira was definitely related to 

 primitive lung-fishes : he had little sympathy 



with those who believed that they had solved 

 the riddle of Tremataspis and Bothriolepis by 

 associating with them arthropods. As a sys- 

 tematist, Eastman was thorough, and the 

 fonns which he described will rarely need re- 

 vision.- 



- Mrs. H. J. Volker has recently reviewed the 

 papers of Dr. Eastman, and summarizes his syste- 

 matic contributions as follows: 

 New families: (3) 



Astraspidse. 



PeripristidiB. 



Pholidophoridse. 

 New genera: (12) 



Belemnacanthus. 



Campyloprion. 



Eobothus. 



Eolabroides. 



Sistionotophorus. t 



PalceopMchthys. 

 Farafundulus. 

 Parathrissops. 

 Fhlyctwnacanth'us. 

 Protitanichthys. 

 Tamiobatis. 

 New species: (115) 



Acantlwdes ieecheri; marshi. 



Ameiurus primmvtis. 



Amiopsis (?) dartoni. 



Anguilla iranchiostegalis. 



Asterolepis clarJcei. 



Asthenocormus retrodorsalis. 



Belemnacanthus giganteus. 



Blochius moorheadi. 



Bothriolepis coloradensis. 



Campyloprion annectans. 



Caranx primoevus. 



Carcharias collata; incidens. 



Cestracion eitteli. 



Chanoides leptostea. 



Cladodus aculeata; prototypus ; urhs-ludovici. 



Ccelaoanthus exiguus; welleri. 



Coelogaster analis. 



Conchodus variaiilis. 



Ctenaoanthus acutus; decussattis ; longinodosus ; 



lucasi; solidus; venwstus. 

 Dicrenodus texanus. 

 Diniohthys dolichocepTialvs ; livonicus; pelmensis ; 



pustulosus ; trautscholdi. 

 Diplodus priscus; striatus. 

 Diplomystus goodi. 

 Dipterus calvini; costatus; digitatus; mordax; 



pectinatus; uddeni. 

 Elonichthys disjunctus ; perpennatus. 

 Eomyrus formosissimus ; interspinalis. 

 Erismacanthiis iairiatus; formosus. 

 Fissodus dentatus. 

 Galeocerdo triqueter. 

 Glyptaspis aiireviata. 

 Gyracanthus primcevus. 

 Harpacanthns procumiens. 

 Helodus comptus; indsus. 

 Histionotus reclinis. 



