80 FOSSIL CIRRIPEDIA. 



Pollicipes anyustatus Geinitz (Die Verstein. von Kieslingswalde des Sachsiscli-bohmisclien, Kreidegebirges, 

 1843, Tab. IV, fig. 10) is almost certainly a Scalpellum, and probably a new species ; the carina is narrow, 

 bowed inwards, with the basal margin sharply pointed ; tectum carinated, separated from the parietes by a 

 line or ridge, which is said to be enclosed between two fine furrows ; this latter seems to be its most 

 singular character. I cannot make out whether it has intra-parietes ; only a single view is given : found 

 at Strehlen, Saxony, in Planer-Kalke (chalk marl), and, according to the same author, in his ' Das Quader- 

 sandsteingebirge" (p. 100) ; likewise in Greensand, at Essen, in Westplialia. 



The Pollicipes Icevis of J. Sowerby, figured in 'Geological Transactions,' 2d series (1836), Vol. IV. PL 

 XI, fig. 5, I consider the same as his P. unguis, fig. 5* ; but the P. Icevis, from Blackdown, PI. XVI, fig. 1, 

 seems to be certainly a distinct species, and possibly a Scalpelhim : no details are given. The P. radiatus 

 of the same author, of the lower greensand (PI. XI, fig. 6), is unknown to me ; the tergum figured is like 

 that of S. arcuatum ; the upper valve, if a scutum, is very remarkable. 



The name Pollicipes radiatus has been a favorite with authors ; there is a tertiary species so called, 

 but not described in 'Muller's Jahrbuch,' 1835. Koch and Dunker, also, (Norddeutsch. Oolithgebildes, 

 1837,) have given this name to a tergum found, according to Roemer, in the Hilsthon or Lower Greensand ; 

 I conceive it to be scarcely possible, and very inconvenient, to attach names to terga. 



Michelotti has called, without any description (' Bulletin, Gcolog. Societc,' tom. 10, p. 140), a tertiary 

 Pollicipes from near Turin, P. anticptus, — a most infelicitous name for a miocene species. 



Roemer in his ' Die Versteinerungen des Norddeutsch. Kreidegebirges,' 1841, has figured, PL 16, fig. 13, 

 the above-mentioned P. radiatus, of Koch and Dunker; also, Pollicipes asper (PL 16, fig. 1.5), which is 

 founded on a fragment of a carina, which I have been permitted to inspect by the great kindness of Roemer ; 

 it is not sufficiently perfect in the upper part to show whether it probably belonged to Scalpellum or Polli- 

 cipes, but apparently to the latter genus ; it is almost certainly distinct from anything which I have seen ; 

 the tectum is very flatly arched, and the basal margin (as inferred from the lines of growth) scarcely at all 

 protuberant ; it was very slightly bowed inwards ; its surface is covered with faint longitudinal ridges, and 

 these are crossed by concentric, leaf-like, projecting lines of growth. The longitudinal ridges cause this valve 

 to resemble that of Scalpellum solidulum from Scania, but the basal margin is much less protuberant, the 

 tectum more steeply arched, and the whole valve thicker than in that species. The P. asper comes from the 

 "Oberer Kreidemergel" (Upper Chalk) of Quedlinburg, in Westphalia. 



Roemer has also described in the same work (PL XVI, fig. 10, a, h, r,) Pollicipes uncinatus from the 

 Upper Chalk : the carina (fj) has its roof sharply carinated ; its parietes are quite flat, and I presume 

 rectangularly inflected, which makes me suppose it may have belonged to a Scalpellum ; basal margin rectan- 

 gularly pointed. The valve, described as a tergum (c) I liave had, through the kindness of Roemer, an 

 opportunity of examining ; it cannot, I conceive, be a tergum ; it is unknown to me ; it appears to 

 be a carinal latus ; if so, the valve ought to have been placed in the figure transversely to its present 

 position. 



Reuss in Die Verstein. 'der Bohmischen Kreideformation (1845) has figured (Tab. V, fig. 43) a carina, 

 under the name of Pollicipes conicus, from the Chalk ; I do not consider it to be recognisable. The P. glaber 

 in this same work (Tab. V, fig. 45-49, and Tab. XIII, fig. 86 — 91) appears to consist of several species ; on 

 the other hand, P. radiatus (Tab. V, fig. 42) appears to be a scutum of the true P. glaber. 



Dr. W. Dunker (Palaeontographica : Beitrage zur Naturgeschichtc, &c., der Vorwelt von Dr. W. Dunker, 



