(Jretaceuus (tnd 'Jvitmri/ ( impedes. lUo 



l!>lL*. Pollicipes dorsufna, J. Steenstru]» ; K. H. Nielsen, Cirripedienie 

 i Daumarks Danien-AHejriiif^t'r, Mt-ddL-l. Daii.sk. geol. J*'oien. Jid. iv. 

 llet't i. J). -.M), pi. i. liprs. l'-|.",, 17 ( ,1011 li^-s. 14 1(5). 



1912. Pollicipes eleyans, Darwin ; K. B. iSielsi-i), torn. cit. p. ,j2, pi. ii. 

 tigs. 9, 10. 



Diagnosis. Valves smooth, strong, and tliick. Scuta 

 approaching in shape an equilateral triangle; occludcnt 

 margin exteriorly thickened to form a rounded ridge; hasi- 

 lateral angle widely truncated, equalling half the length 

 of the basal margin; tergo-lateral portion, formed by the 

 upturned growth-lines, extremely narrow. Tcrga with a 

 straight wide ridge, with steep sides, extending from the 

 apex to the bnsal angle, which on the seiital side is obliquely 

 truncated. Valves of lower whorl large, subtriangular, high, 

 and incurved. 



Distribntioyi. Danian : Faxe, Denmark. 



Tijpe. Steenstrup (1839) originally founded this species 

 on a tergiim, but included in his Pullicipes validus a scutum 

 of the species. Darwin (1851) subsequently figured a 

 scutum, tergum, and carina. All the foregoing specimens 

 •Jiould be in the University of Copenhagen, but at present 

 only the carina figured by Darwin (1851, pi. iv. figs. 4a-c) 

 can be identified, and this is in the Mineralogical Museum. 



Material. Dr. K. Briinnich Nielsen has recently collected 

 a number of valves of this species, comprising 18 carinae, 

 48 scuta, 44 terga, and 37 valves of the low^er whorl. Of 

 these he figured (1912) a scutum, tergum, and a carina, 

 together with certain valves of the lower whorl. He included 

 with the latter a carinal latus of a Scalpellum (pi. i. figs. 

 14-16), under P. elegans a rostral latus of P. dorsatus (pi. ii. 

 figs. 9, 10), and (pi. ii. figs. 13-18) some peduncular plates 

 which I believe to belong to P. dursatus, since they agree 

 more with the ornament of the valves of that species. 

 Through the kindness of Dr. J. P. J. Ravu, I have been 

 able to examine the valves of this species figured by Dr. K. 

 B. Nielsen, together with a series of valves of the lower 

 whorl, all of which are in the jNIineralogical Museum of the 

 University of Copenhagen. A further scries of seven valves 

 of the lower whorl has been presented by the Copenhagen 

 University to the Geological Department of tlie British 

 Museum, and these are registered I. 15868-1. 15874. For 

 the specimens here figured, I am indebted to Dr. K. B. 

 Nielsen, as well as for a carina, 3 scuta, 2 terga, and a 

 subcarina. 



Measurements. This is a comparatively large species, and, 

 Ann. ct Maq. N. Hint. tSer. 8. Vol. xiv. 13 



