54 JURASSIC BIVALVIA AND GASTROPODA 



being about 90 mm. It is a well-inflated valve, ornamented with a relatively small 

 number (about 8) of rather unevenly spaced, prominent ribs, separated by wide 

 intervals occupied by numerous radial threads which alternate in strength more or 

 less regularly ; there is a slight tendency for the middle thread of each main interval 

 to be more prominent than the others. This specimen seems to be larger than any 

 hitherto recorded under the specific name inacquistriata, but it is smaller than 

 Boehm's Hinnites gigas, a shell 155 mm. high. Notwithstanding the very irregular 

 arrangement of its ribs, it is now suggested that Boehm's species should be considered 

 a synonym of the inaequistriata of authors. The necessity for adopting Braun's 

 name thurmanni for this species is indicated by the synonymy here given. The 

 European range of this species is from the Upper Oxfordian to the Kimmeridgian. 



Eopecten aft", albus (Quenstedt) 

 PL 6, fig. 7 



1836. aft. Spondylns velatus Goldfuss : 94, pi. 105, figs, ^a-d (secondary homonym of Pecten 



velatus Goldfuss, 1833 : 45, also an Eopecten). 

 1857. aft. Pecten velatus albus Quenstedt : 628, pi. 78, fig. 3. 

 1878 

 1904 

 1926 

 1936 

 i960 



aft. Hinnites astartinus Greppin ; de Loriol : 163, pi. 23, fig. 3. 

 aft. Hinnites bonjouri de Loriol : 231, pi. 25, figs. 1,2. 

 aft. Velopecten velatus (Goldfuss) ; Staesche : 122, pi. 6, fig. ir. 

 aft. Velata bonjouri (de Loriol) ; Dechaseaux : 70, pi. 8, fig. 14. 

 Eopecten cf. bonjouri (de Loriol) ; Joubert, pi. 8, fig. 2. 



Material. One specimen (no. L. 92247). 



Locality and horizon. Wilderri hill, 11 miles S.S.W. of Rahmu, N.E. Kenya ; 

 Upper Oxfordian, Seir Limestones. 



Remarks. This specimen, a strongly convex left valve of an Eopecten, is only 

 about 22 mm. high and not identifiable specifically with any certainty. There are 

 about 13 rather irregularly spaced, weak, narrow principal radial costae which are 

 separated by flat intervals ; a weak thread of secondary strength is present in one 

 or two of these, but otherwise they appear smooth. It is probable that a few more 

 ribs of primary strength would have appeared as the shell grew. The specimen 

 bears some resemblance to de Loriol's fig. 2 of Hinnites bonjouri, a species considered 

 by Staesche to be a synonym of the form to which he applies the name Velopecten 

 velatus, a secondary homonym. The name albus Quenstedt is here accepted for the 

 species. In Germany, according to Staesche, this ranges throughout the Malm, or 

 Upper Jurassic. 



Genus CAMPTONECTES Meek 1864 

 Camptonectes auritus (Schlotheim) 



1813. Chamites auritus Schlotheim : 103. 



1929. Chlamys (Camptonectes) lens (Sowerby) ; Weir : 25, pi. i, fig. 39. 



1930a. Camptonectes lens (Sowerby) ; Arkell : 94, pi. 7, fig. 1 ; pi. 9, figs. 4-7. 



1948. Camptonectes auritus (Schlotheim) ; Cox & Arkell : 14. 



i960. Camptonectes aurites [sic] (Schlotheim) ; Joubert, pi. 7, figs. },a-e. 



