-<> JnHAN KLEK. [SEC. ARCT. EXP. FRAM 



1. The fossiliferons conglomerates and -and-toue- of Skrap Valley in 

 (\\<- middle part of the series. 



2. S. 0. Haken's sandstone probably higher up \\\ the -cries. although 

 tin- precise distance cannot he stated. 



.'!. Tin- dark schists of (lalge point, somewhat higher. 



4. The conglomerate strata at Bregnekleften, just almve I he preceding. 



Lamellibranchia ta. 



Phtonia, cf. cylindrica HAI.L. 

 (PI. II, tigs I 2). 



Amongst the specimens collected hy PER S<:HEI in the rich fish 

 hori/on at Skrap Valley we find an abundance of a small mnssle which 

 i- nl considerable intere-l. 



A- regards the determination of the genus, this is no easy matter, 

 a- I have only this species and no material for the purpose of compa- 

 ri.-on. At first I was inclined to favour the genus Glossifcx: hnl the 

 ah.-ence of a Immla in the new form, the less pointed anterior end. and 

 the almost straight cardinal line, seem to separate this specimen from 

 the latter. Moiliontorftlid. which was also posihle. has a more ohliipie 

 form. At the same time it appears to agree very well with HAI,I/> 

 description of the genus Phtonia. 



Description. The shell is small, elongate-elliptical the length 

 lieing a little more than twice the height. The hasal margin is straight 

 Or -lightly convex. Posterior extremity regularly rounded, hut somewhat 

 nhliipn' on the upper poster! >r margin. Anterior end short, narrowed. 

 and rounded or somewhat pointed at the extremity. Cardinal line nearly 

 -traight. ahont half the length of the shell. Valve- moderately convex. 

 P.eaks -uhanlerior, low. appre--cd, \\ilh sometime- ; \ faint indication of 

 a depression extending from the heak to the hasal margin. 



Surface marked h\ line, even, concentric striae: radiating striae are 

 no! to he seen. As a rule a few coarser line- of -ro\vth are visihle. 

 Anterior muscular scar distinct, po.-lerior muscular -car oh-cnre. 



Tlner -pecimen- niea-iire ri - j led i vel y 1(1. 17."> and I 7."> mm. in 

 leughl and 7.">. 7 "> and S mm. in height. 



Observations. This description ha- heeii kept close to that of 

 riilni<t I'l/liiiilrirn MALI, as given hy 1 1 MI.', and agrees alnio-l enli- 

 re|\ \\ilh the -ante, hoiihl may he occa-ioned hy one or two points. 



Nat Hist, of N. Y..rk. l > al;ir.,i,|,,|,, y y. V..I. V. I. l,a,n. -Ililimm-liialii. II. ISS.',. pau-. I7:J. 



