260 Mr. G. B. Sowerby, Jun.j on a new Fossil Cirripede. 



the elytra are three black lines, which are about half the width of 

 the whitish interspaces ; one of these lines is parallel with and at 

 a short distance from the suture ; the other two are dhected ob- 

 liquely outwards, being furthest from the suture at the apical end 

 of the elytron. The thorax in the male is as broad as the elytra 

 (the sides of which are parallel in this sex, but slightly dilated in 

 the female), and it is broadest rather in front of the middle. 



XXXIII. — Description of a new Fossil Cirripede from the Upper 

 Chalk near Rochester. By Mr. G. B. Sowerby, Jun. 



To the Editors of the Annals of Natural History. 



Gentlemen, 

 I HAVE much pleasure in presenting the accompanying letter 

 and di-awings for publication in yom- valuable periodical. As the 

 fossil, independent of its great beauty, appears to be quite new 

 to science, I am desirous of its being published as soon as pos- 

 sible. I remain. Gentlemen, very truly yom-s, 



N. T. Wetherell, F.G.S., M.R.C.S. &e. 



Highgate, Sept. 12, 1843. 

 Dear Sir, 



Having carefully examined the beautiful fossil which you sent 

 me from the Upper Chalk near Rochester, I conclude it to be a 

 Cirripede of the Pedunculated kind, but so different from every- 

 thing with which we are yet acquainted as to form the type of a 

 new genus. The description however must be imperfect, only one 

 side of the shell being visible. 



Fig.l. 



Fig. 2. 



and some important parts being 

 possibly wanting. 



I send two drawings, fig. 1. 

 showing the fossil as it is seen 

 imbedded in the chalk, outside 

 the cast of a large Ammonite; 

 and fig. 2, which is partly con- 

 jectural, a front view, showing 

 where the cilia {a) might pro- 

 trude, and the probable form, if 

 any, of the basal attachment [b) . 



I propose to describe the shell as follows : — 



Class CIRRIPEDES. 

 Fam. Pedunculata. 



LOEICULA PULCHELLA. 



L. testa obHque ovali, ventricosa, lateraliter subcompressa ; apice 

 conica, valvis (utrinque ?) tribus, triangularibus. Isevibus, antica 



