224 MESSES. E. HEEON-AXLEN AND A. EARLAND ON THE 



80. Haplophragmium canariense, var. pauperata, Chapman. (New to 



Britain.) 

 Haplophragmium canariense, var. pauperata, Chapman, 1913, EHH. p. 556, woodcuts figs. 1-4. 



2 Stations. 



A few specimens at Stns. 4 and 21, in which each chamber was deflated and collapsed. 

 These specimens were constructed mainly of mica-flakes, in itself perhaps a sign of 

 depauperation. Prohably the micaceous examples of H. canariensis previously referred 

 to would he liable to similar distortion in most instances when removed from water. 

 Chapman's l-ecord was from the Eocene of Hengistbury Head. It seems a useful 

 varietal name, as such depauperated individuals are widely distributed. 



81. Haplophragmium runianum, sp. nov. (Plate 40. figs. 15-18.) 



1 Station. 



Test free, nautiloid, more or less depressed at the umbilicus, constructed of rather 

 coarse sand-grains and grey cement. As a rule, no septation visible externally. In 

 large specimens an occasional constriction indicates the presence of a suture. Marginal 

 edge thick and rounded. Aperture simple, ranging between a fissure and a constricted 

 terminal opening of irregular form. Viewed as an object in balsam the multiloculax 

 character of the test becomes apparent ; it is then seen to consist of three to four 

 convolutions divided into numerous chambers (thirteen or fourteen in the last convolu- 

 tion) by septal walls that are usually very thin in comparison with the thick outer 

 wall of the test. The chambers are almost square in section. 



This curious and obscure form occurs in some numbers at Stn. 17. It might easily 

 be overlooked, and regarded as a thick-walled and obscure variety of H. canariense 

 (d'Orb.), but the number and shape of the chambers when viewed in balsam removes it 

 from any close relationship to that species. It bears considerable resemblance to the 

 Lituola nautiloidea, var. (Haplophragmium) depressa of Rupert Jones in the paper on 

 " The Deep Boring at Richmond " (Q. J. G. S. vol. xl. 1884, p. 765, pi. xxxiv. fig. 2), but 

 differs in the fact that the sutural lines are visible in the later stages of the rather 

 poor figure illustrating that variety, whereas in II. runianum they are only visible 

 externally uuder exceptional conditions. The nearest affinities of both II. runianum and 

 H. nautiloidea var. depressa are probably with II. rotulatum, Brady, as marked by the 

 concavity of the shell on both sides in the umbilical region, the thick marginal edge 

 and the obscurity of the septation, and numerous chambers. 



Diameter '5-"7 mm. ; width of final convolution - 1 ; breadth of each chamber in final 

 convolution "1. 



82. Haplophragmium globigeriniforme (Parker & Jones). 



Lituola nautiloidea, var. globigeriniformis, Parker & Jones, 1865, NAAP. p. 407, pi. xv. figs. 46, 4™, 



pi. xvii. figs. 96-98. 

 Haplophragmium globigeriniforme, Brady, FC. 1884, p. 312, pi. xxxv. figs. 10, 11. 



15 Stations. 



Generally distributed and fairly frequent at some Stns., notably Stns. 3 and 10. 



