PLATE IV. 



Figure 1. — Heteropegma nodus gordii, n. gen. and sp. 



(a) Portion of a horizontal section, .... 



(6, c) Two triradiate spicules of trie cortex, 



(</) Tubar and parenchymal quadriradiate spicules, . 



,, 2. — Anamixilla torresi, n. gen. and sp. 



(a) Portion of a horizontal section, .... 



(b) A gastric quadriradiate spicule, .... 



(c) A subgastric triradiate spicule, .... 



„ 3. — Ute argentea, n. sp. 



Portion of a horizontal section, . . . x 100 



„ 4. — Amphorisous pocidum, n. sp. 



Portion of a horizontal section, . . . x 100 



„ 5. — Amphoriscus elongatus, n. sp. 



Portion of a horizontal section, . . . x 1 00 



