726 PASTOB n. D. J. WALLENttREN ON SPECIES 



careous pellicle or epitheca, left after incineration in H.peUiculata. 

 The internal structure, as regards the interzooecial pores and 

 canals, appears to be very much the same in both, except that in 

 H. neozelanica there is no appearance in the walls of the zocecia of 

 the constrictions, giving them a beaded aspect, described and figured 

 by Mr. Waters, and to which he is inclined to attribute the 

 a^oparent constrictions of the zocecia which are so common in most 

 of the fossil species. In some of these, however, as I may take 

 this opportunity of remarking, there are, besides the deceptive 

 appearance of constrictions above referred to, distinct transverse 

 dissepiments, which, as Mr. Waters remarks, are distinctly figured 

 by M. J. Haime in his H. pustulosa. They are, however, ecjually 

 evident in other fossil species. 



DESCRIPTION OF PLATE XV. 



Fig. 1. Heteropora neozelanica, natural size. 

 %. Portion of surface, magnified. 



3. Transverse section, also highly magnified. 



4. Portion of surface, sbowiug openings, zooecia, and cancelli, much 



enlarged. 

 6. A dead fragment of Myriozoum ? resembling Hcteropora. 



6. Portion of surface of same, enlarged. 



7. A doubtful form, resembling Hetcropora of a globular form. 



8. A small portion of the surface, magnified. 



The two latter forms (figs. 6-8) are from the ' Challenger ' collection. 



An Analysis of the Species of Caddis-flies {Phryganed) described 

 by Linnseus in his * Fauna Suecica.' By Pastor H. D. J. 

 Wallengeen. Communicated (with Notes) by E. M'Lach- 

 LAN, F.E.S., r.L.s. 



The identification of the Swedish species o£ Phryganea described 

 by LinnsDus cannot fail to be of value to science ; and I have 

 therefore attempted to render them more clear. But it is not to 

 be exj)ected that all the enigmatical questions propounded in his 

 descriptions can be answered ; and I shall be glad if some of 

 ttem, at least, are elucidated by the remarks that folloAv. 



Phetganea PHALJ3N0IDES (ISTo. 1481). — The identity of this 

 with JSfeuronia pJialcBnoides of succeeding authors is proved be- 



