.Mr. H. G. Seeley on Zoocapsa tlolichorhamphia. 283 



lion of the ccntruni it resembles tlie lower dorsal vertebrae of 

 birds. 



I liavc made this note, not as a siifheient description of the 

 specimens to which it relates, but in the hope that other parts 

 01 this and allied animals may be made avadable for scientific 

 description by those collectors who possess them, and that 

 they will so make known a group of animals as marvellous in 

 size aiid organization as any which have enriched the records 

 of paheontology. AVith the fossil I would associate the name 

 of my friend Dr. Ilulkc, elirouieling the species as Ornithojjsis 

 IMkei 



XXXII. — On Zoocapsa dolichorhamphia, a Sessile Cirrvpe.de 

 from the Lias ofLi/melieqis. By Harry G. Seeley, F.u-.S., 

 Assistant to Professor Sedgwick in the AVoodwardian Mu- 

 seum of the University of Cambridge. 



•Among some Lias fossils obtained at Lyme liegis by Mr. 

 Henry Keeping, for the Woodwardian Museum, was one 

 which exposed a portion of the tergum of a sessile Cirripede. 

 It rested in a Jiard matrix of calcareous clay, immediately upon 

 •a layer of Pentacrinite-limestone ; and it was not till after 

 some days of dissecting that I had the pleasure of laying bare 

 the entire tergum and entire scutum of the oldest known repre- 

 .sentative of the group. Every way it is a remarkable fossil : 

 the scutum closely resembles that of the pedunculate Cirri- 

 pede Scaljyellum ; the tergum, by its long beak, recalls certain 

 Balani • while the emargination of its basal border points 

 strongly to another beaked t^'pe, Ehninius. Yet as it fortu- 

 nately happens that the internal aspect of these opercular 

 valves is exposed, it is manifest that neither valve displays 

 the muscular scars whicli distinguish the Balanida:? ; and herein 

 they resemble the Vcrrucida,\ But since the shape and arti- 

 culation of the valves offer no resemblance to Verruca^ it is 

 open to speculation whether an inner porcellanous layer of 

 shell has disappeared, and so obliterated the muscular impres- 

 sions — a supposition which is, perhaps, supported Ijy the scu- 

 tum being rough and cancellate internally, seemingly from 

 reproducing the outside ornament. From the tergum and 

 scutum being in juxtaposition, and these valves being only 

 two in number, there is some support for a VeiTueian hypo- 

 thesis ; yet from the articulation of the valves confonning to 

 the sti-aight-hinge type of Balamis, it is probable that, unless 

 we have here a new family type (as I incline to believe), its 

 place is among the Balanida^. 



19* 



