REPORT ON THE TETRACTINELLIDA. 
clix 
Genus 6. Amphibleptula, 0. Schmidt. 
Amphibleptula, 0. Schmidt, Spong. Meerb. Mexico, p. 28, 1879. 
Azoricidse with a single oscnle at the summit, and poriferous areas borne at the ends 
of short cylindrical processes, irregularly and generally distributed over the sides, 
T)rpe — Amphibleptula madrepora, 0, Schmidt (p. 351). 
(?) Genus 7. Tremaulidium, 0. Schmidt, 
Tremaulidium, O. Schmidt, Spong. Meerb. Mexico, p. 31, 1879. 
Founded on a single species. 
Type — Tremaulidium geminum, 0. Schmidt (p. 352). 
Genus 8. Leiodermatium, 0. Schmidt. 
Leiodermatium, 0. Schmidt, Spong. Meerb. Mexico, p. 28; Spong. Atlant. Gebiet., p. 22, 1870. 
„ Zittel, Abhandl. d. k. baier. Akad. d. Wiss., Bd. i. p. 103, 1878. 
Azoricidse of vasiform shape, with comparatively large oscules situated on the outer 
surface ; pores distributed over the inner surface. 
Type — Leiodermatium lynceus, 0. Schmidt (p. 352). 
Genus 9. Sympyla, n. gen. 
Azorica {p.p.), 0. Schmidt, Spong. Meerb. Mexico, p. 89. 
Azoricidse in which the poral terminations of the excurrent canals are collected into 
separate areas, which are distributed over one side of the sponge ; the oscules are simple, 
and are distributed over the side opposite to that bearing the pores. 
Type — Sympyla cribrifera (0. Schmidt, p. 353). 
Family II. Anomocladi J)M, Zittel. 
Anomocladina, Zittel, Abhandl. d. k. baier. Akad. d. Wiss., Bd. i. pp. 97, 100, 1878. 
,, Sollas, Proc. Roy. Irish Acad., ser. 2, vol. iv. p. 486, 1885. 
Anoplia in which the desma is acrepid, a variable number of smooth cylindrical cladi 
radiate from a thickened centrum, zygosis occurs between the expanded ends of the cladi 
of one desma and the centrum of another. 
Genus 1. Vetulina, 0. Schmidt. 
With a single species — Vetulina stalactites, 0. Schmidt (p. 354). 
