I04 NEW YORK STATE MUSEUM 



larger plates that they must have overlapped considerably with the 

 truncated ends. From the asymmetric shape of the plates and the 

 difference in the two longer margins, it can be seen that there must 

 have been two rows of plates which met in a dorsal and ventral 

 margin. The Anatifopsis ? elongatus figured by Had-, 

 ding shows one row of long quadrangular plates which are over- 

 lapping with the shorter truncated side and become rapidly shorter 

 at one end. We can conclude from the series of four plates which 

 we possess and the form of our other plates that the surface 

 sculpture runs parallel to the longitudinal axis of the organism and 

 that the plates therefore overlapped also with their shorter side. 



Barrande placed his Anatifopsis in the cirripedes. Hadding, 

 however, is inclined to refer the body which he found to the 

 Phyllocarida. He states that he had eight specimens with con- 

 tinuous series of plates. "These," he writes, "are, of different 

 shape but so arranged that they form a continuous body. Whether 

 this is to be regarded as the abdomen of a phyllocarid or belongs to 

 another animal class, I can not decide yet." We see no reason why 

 our species should not be placed among the cirripedes, provided the 

 plates form a double continuous series, as we have concluded above. 

 It will then belong to the cirripede family Lepidocoleidae Clarke 

 (see Zittel-Eastman, Text-book of Palaeontology, second edition, 

 v. i, p. 743) which is characterized as follows: "Body covered 

 with two vertical columns of overlapping plates, those of one series 

 alternating with those of the other. Terminal or caudal plate 

 axial. Basal or cephalic portion of the body with a ventral curva- 

 ture. Apexes of the plates on the dorsal margin. No accessory 

 plates." Doctor Clarke has referred three species to this most 

 primitive of the cirripede genera, namely, Lepidocoleus 

 jamesi (Hall and Whitfield), a Cincinnatian form, L . s a r 1 e i 

 Clarke, a Niagaran type, and L. polypetalus, a Helder- 

 bergian species. 1 



There is good reason, in our view, why Anatifopsis, as repre- 

 sented by the Bohemian and our species, should be placed with 

 Lepidocoleus among the Lepidocoleidae. Not only is there evi- 

 dence of the presence of a continuous column of the plates, as in 

 Lepidocoleus, but the plates themselves, in their form, in the apex 

 and in the linear surface sculpture are decidedly more similar to 



1 These were described and the genus Lepidocoleus fully discussed in 

 The Structure of Certain Paleozoic Barnacles, by J. M. Clarke. The Amer- 

 ican Geologist, v. 17, p. 137. 1896. 



