BY E. F. KALLMANN. 405 



ToPSENT, E. — "Contributions a FEtudedes Spongiaires de 1' Atlantique 



Nord." Resultatsdes Camp. Scient. du Pr. de Monaco, 1892, Fasc, 



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

 " Diagnoses d'Eponges Nouvelles de la MMiterran^e et 



plus particulierement de Banyuls." Arch. Zool. Exp. etGen., 1892, 



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



" Materiaux pour servir k I'Etude de la Faunedes Spon- 



giaires de France." M6m. Soc. Zool. France, 1896, ix., j).121. 

 "Spongiaires des Azores." Resultats des Camp. Scient. 



du Pr. de Monaco, 1904, Fasc. xxv.; (a) p. 152, PI. i., fig. 10; PI. 



xiii.,fig.l3; (6) p. 138. 

 10. — "Spongiaires de I'Exp^dition Antarctique Nationale 



Ecossaise." Trans. Roy. Soc. Edinburgh, 1913, xliv.. Part 3, p. 616, 



PI. i., fig.4; PI. vi., fig.lo. 

 11. Whitelegge, T.— "Scientific Results of the Trawling Expedition of 



H.M.C.S. 'Thetis'. — Sponges, Part ii." Mem. Austr. Mus,, iv., 



Part 10, 1907, pp.509, 512. 



EXPLANATION OF PLATES XXL -XXII. 

 Plate xxi. 

 Rhabdosir/nia mammillata Whitelegge. 

 Fig. 1. — Longitudinal (desarcodised) section of the skeleton (of a digitiform 

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

 axial region; ( x 15). 

 Fig.2. — Entire specimen; { x f ). 



Echinaxia J'rondala Whitelegge. 

 Figs.3, 4. — Pattern of the skeleton as shown in longitudinal section parallel 

 to and in the mid-plane of the (lamelliform) sponge. Fig. 3 shows 

 more distinctly vthe longitudinal spicule-strands; in Fig.4, which is 

 from a thinner section, many long interstitial megasclei-es are also 

 to be seen; ( x 50). 



Plate xxii. 

 Echinaxia frondnla Whitelegge. 

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

 surface of the (lamelliform) sponge. The desarcodised section 

 (shown in Fig. 1) is from near the upper margin of the sponge; the 

 other (undesareodised) is from near its base; ( x 50). 



[Printed off', Septemlx-r 2»)th, 1917. 



