Dr. H. Woodward — Cirripedes Jrom Tnmminghmn Chalk. 345 

 Terga. — There are ten examples of terga from Trimmingham : — 



Carina. — I assume that the larger of the conical series of valves 

 found by Mr. Brydone associated in the hollow of a chalk flint from 

 Trimmingham are referable to carince. They agree most closely 

 with M. Bosquet's figures of the carina of Mitella fallax from the 

 Chalk of Maestricht. The following are the dimensions of four 

 carincB and eight rostra : — 



Carina. 

 Colin. Length. Breadth at base. 



1. R. M. Brydone 20 mm. Estimated on a straight line, 8 mm. 



2. R.M. B. ... 20mm. ,, ,, ,, 9mm. 



3. R.M. B. ... 13mm. ,, ,, ,, 9mm. 



4. R. M. B. ... 13mm. ,, ,, ,, 8mm. (rugose curved form). 



8. R.M. B 3 „ 4 „ „ 



Three other valves must be noticed ; these are carinal latera 

 (Figs. 19, 20). The most perfect example was found by Mr. Brydone 

 attached to a carina of Brachylepas (PolUcipes) fallax, which seems 

 good evidence of its having once formed part of the same capitulum. 



Dr. Marsson,^ in his memoir on the " CiiTipedien d. Eiigenschen 

 Kreide," p. 12, taf. i, figs, 3c, c, figures and describes a precisely 

 similar form of plate under Scalpellum fossula ; but I believe that 

 our Trimmingham examples really belong to Brachylepas fallax 

 (cf. Figs. 19, 20 with Marsson's taf. i, fig. 3). Dr. Marsson says: 

 " These carinal latera are obliquely triangular, and have an arcuate 

 carinal side, the apex (or umbo) of which has an uncinate curvature 

 directed towards the opposite (concave) side, which presents a 

 parietes-like margin curved at almost a right angle. This margin 

 terminates directly underneath the umbo in a rectangular crest ; 

 the surface is marked by longitudinal parallel rib-like striae, passing 

 over the crest and forming underneath it, alongside the carinal 



* " Mittheilungen aus dem Naturwissenschaftlichen Vereine von Neu-Yorpommorn 

 und Riigen in Greifswald," von Dr. Th. Marsson, xii-xviii, Berlin, 1880. 



