PLATE V 



Figure 1. — Utc argentea, n. sp. 



(a) A subg.astric triradiate spicule, . 



(//, c) Two tubar acerate spicules, 



(d, e) Two gastric quadriradiate spicules, 



(/) Do. embryonal, 



(;/) A tubar quadriradiate spicule, . 



(ft, I) Two gastric acerate spicules, . 



(m, w) Two dermal triradiate spicules, 



(o) A young dermal acerate spicule, 



(p) Do. fully developed transverse section 



Di 



2. — Amphoriscus p>oculwm, u. sp. 



(a) A subgastric triradiate spicule, 



(b) A subdermal triradiate spicule, 



(c) A dermal triradiate spicule, 



(d) Do. embryonal, 



(e) A gastric triradiate spicule, 

 (/) A parenchymal acerate spicule, 



3. — Amphoriscus fiamma, u. sp. 



(u) A subgastric triradiate spicule, . 



(6) A subdermal triradiate spicule, . 



(b l ) Do. embryonal, 



(c) A gastric quadriradiate spicule, . 



(d, e) Two young parenchymal acerate spicules, 



(/) The same, fully developed (transverse section), 



(g) A linear acerate spicule of the peristome, . 



4. — Amphoriscus elongatus, n. sp. 



(a) A subgastric triradiate spicule, 

 (/») A subdermal quadriradiate spicule, 

 ('•) A gastric quadriradiate spicule, 

 ('?) A dermal triradiate spicule, 

 (') A minute acerate spicule. 



