BY E. F. liALLMANN. 405 



6. TopSEXT, E. — "Contributions a TEtude des SpongiairesdeTAtlantique 



Nord." Resultats de.s Camp. Scient. dn Pr. de Monaco. 1S92. P'aso. 



ii., p. 116, PI. xi., fig. 7. 

 7. "Diagnoses d'Eponges Xouvelles de la Mediteirane-e et 



plus partieulierenient de Banj'uls. " Aroli, Zool. Kxp. ctiien., ISll'J. 



(2), X., Notes et Revue, p. xxv. 

 S, " Materiaux pour servir a I'Ktude de la Faunedes Spon- 



giaires de France." Mem, Soc. Zool, France, ISVMi, ix., p. 121. 

 9. " iSpongiaires des Acores.*" Resultats des Camp. Scient. 



du Pr. de Monaco, 1904, Fasc. xxv.; in) p.l.VJ. PI. i.. tig. 10: Tl. 



xiii.,lig.l8; (/>) p. 188. 

 10. " Spongiaires de TExpt'-dition Antarctique Xationale 



Ecossaise." Trans. Roy. Soc. Edinlnngh, 1018. xliv.. Part 8, p.OU), 



PI. i., fig. 4; PI. vi., fig.l.-). 

 11. Whitele<.'(:e, T. — "Scientific Results of the Trawling Expedition of 



H.M.C.S. 'Thetis'. — Sponges, l*art ii." Mem. Austr. Mus.. i\. . 



Pari 10. lfM»7, pp. 500. .112. 



EXPLANATION OF PLATES XXI. XXIL 



Plate xxi. 

 lihahdosujnia mamm illata Whitelegge . 

 Fig.l. — Longitudinal (desarcodised) section of the skeleton (of a digitiform 

 lf)he), showing extra-axial region thereof and also portion of the 

 axial region; ( x lo). 

 Fig.2. — Entire specimen; ( x 0). 



Echinaxia frondu/a Whitelegge. 

 Figs. 8, 4. — Pattern of the skeleton as shown in longitudinal section parallel 

 to and in the mid-plane of the (lamelliform) sponge. Fig. 8 shows 

 more distinctlj^ the longitudinal spieule-strands; in Fig. 4, which is 

 from a thinner section, many long interstitial megascleres are also 

 to be seen; ( x ,>0). 



Plate xxii. 

 Echinaxia froiuhda Whitelegge. 

 Figs. 1,2. — Skeleton as seen in longitudinal section perpendicular to the 

 surface of the (lamellifoim) sponge. The desarcodised section 

 (shown in Fig.l) is from near the upper margin of the sponge; the 

 other (undesarcodised) is from near its base; ( x 50). ^"^p^. \'^^ i^^**V. 



CORRIGENDUM. 

 Page 391, line 14 — for Hetercetya., read Hetcrfctya. 



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