266 MRS. JAN"E LOXGSTAFF ON NON-MARINE 



last whorl ; suture impressed^ crenellated by the termmations of the transverse 

 costulse ; umbilicus narrow, deep, somewhat ovate ; columella descendinor 

 in a curve, outwardly expanded, diffused above into a somewhat ill-defined, 

 outwardly spreading^ parietal callus which reaches to the upper margin of 

 the labrum ; labrum outwardly expanded and reflexed, projecting in front, 

 recedino- below, and a little above to form a broad and shallow sinus ; 

 aperture ovate. 



Alt. 16*25, diam. maj. 11, diam. min. 9*5 mm. Aperture : alt. 8, 

 diara. 5'5 mm. 



Hob. Sheik Torabe ; one young and two adult specimens (Mrs. G. B. 

 Long staff). 



NODULARIA (Cji^LATURA) SOBAENSIS, Sp. nov. (PI. 18. figS. 1-3.) 



Shell rather small, ovate, covered with a somewhat thin, brownish-olive 

 periostracum which becomes scabrous posteriorly, painted (with the exception 

 of the extreme anterior and posterior sides) with fine, radiate, greenish, 

 transverse bands ; both valves marked with concentric lines of growth, 

 considerably wrinkled and coarsely nodulated towards the umbonal regions ; 

 dorsal margin sloping upwards in a straight line from the anterior to the 

 posterior side ; ventral margin gently rounded ; anterior side somewhat 

 angularly rounded ; posterior side broad, o])tuse, rounded below ; right valve 

 bearing a somewhat elongate, erect cardinal, a very fine and rather short 

 anterior, and an elongate, slightly curved posterior lateral ; left valve bearing 

 a weak, rather minutely nodulous cardinal, and two elongate, curved, 

 posterior laterals ; both anterior and posterior muscular scars well impressed, 

 the anterior especially so ; pallial line well marked and continuous in both 

 valves ; interior of shell pale pinkish. 



Long. 19, lat. 31, diam. 12 mm. 



Hah. Soba, Blue Nile; five specimens (Mrs. G. B. Longstajf). 



The specimens from which the present species is described have been 

 submitted to M. Paul Pallary, who is also of opinion that they cannot be 

 referred to any hitherto known form. 



APPENDIX II. 



The Dentition Sfc. of V^eronicella nilotica, Cocherell. (Text-figs. 1 & 2.) 

 By a. C. RoBSON, B.A. 



(By permission of the Trustees of the British Museum.) 



A single example of this species was obtained by Mrs. Gr. B. Longstaff at 

 Hillet al-Nuwer, an islet on the Bahr el-Gebel. It was found among papyrus 

 on the river bank ; and although smaller than the type, it corresponds very 

 closely to the description given by Prof. Cockerell (' Nautilus,^ xxiii. 

 p. 108). The author did not give any account of the raduia or jaw in this 



