THE PORIFERA. 77 



This digitate species is representative of Mr. Carter's 

 family Chalinida, and of his order Rhaphidonemata, which 

 embraces all sponges having a horny fibre cored with spicules 

 produced by the sponge.* 



L. F. M., No. 29. 12. 61. 1. Collected at Morecambe Bay. 



Chalina limbata, Bk. 



Spongia Limbata, Johnston. 



This is a Chalina of quite different form and appearance 

 from C. ociilata, but it is distinctly a Chalina, a pretty net- 

 work of horny matter enclosing the acerate spicules of the 

 species. It is a sessile species, t 



L. M. B. C, No. 85.2. Collected at Port Erin, Isle of 

 Man. 



L. F. M., No. 24. 9. 73. 1. Collected at Holyhead. 



Order V.— ECHINONEMATA. 

 Family. — Ectyonida. 

 Dictyocylindrus stuposus, Bk. 

 This is a Dictyocylindrus with a stellate flesh spicule, 

 and is most probably the Puispalia stelligcra of Schmidt. 

 Mr. Carter has lately broken up his group Pluriformia into 

 three divisions, the last of which is Dictyocvlindrina, to 

 receive sponges of this type. The appearance of the stellate 

 spicule in this species t is a noticeable feature, probably 

 evidencing a relationship to some species in the next order, 

 Holorhaphidota. 



L. M. B. C, No. 85. 3. Collected at Port Erin, Isle of 

 Man. 



L. F. M., No. 29. 10. 73. 1. Collected at Holyhead. 



* See fig. 262, pi. xiii, vol. i, Bowerbank's Mon. Brit. Spong. ; Johnston's 

 Brit. Spong., fig. 94, pi. iii ; Mo7i. Brit. Spong., vol. iii, pi. Isvi ; Esper., 

 1794, taf. xxxvi ; Annals and Mag. Nat. Hist., October, 1885. 



t See Mon. Brit. Sponges, vol. ii, p. 373 ; vol. iii, pi. Ixvii. 



X Mon. Brit. Spon., vol. iii, pi. xix, figs. 1-7; Spongienf. Atlan., p. 60, 

 taf. 5, fig. 14. 



