94
THE VOYAGE OF THE H.M.S. CHALLENGER.
without shells, the outer only surrounded by shells. Already in my Monograph I had described the same peculiar formation.[1]
Synopsis of the Genera of Collosphærida.
I. Subfamily Acrosphærida. (Lattice-shell simple, without an external mantle of network.) | Outside of the shell smooth, without spines or tubuli. | Inside without tubuli. | Inside smooth, | 29. Collosphæra. | |||
Inside spiny, | 30. Tribonosphæra. | ||||||
Inside with centripetal tubuli. | Tubuli imperforated, | 31. Pharyngosphæra. | |||||
Tubuli fenestrated, | 32. Buccinosphæra. | ||||||
Outside of the shell armed with solid spines, but with hollow tubuli. | Spines irregularly scattered on the surface, | 33. Acrosphæra. | |||||
Each larger pore with one single spine, | 34. Odontosphæra. | ||||||
Each larger pore with a coronal of spines, | 35. Chœnicosphæra. | ||||||
Outside of the shell with irregular radial tubuli, the wall of which is solid, not fenestrated. | Tubuli simple, not branched. | Mouth of the tubuli truncated, smooth, | 36. Siphonosphæra. | ||||
Mouth with one single large tooth, | 37. Mazosphæra. | ||||||
Mouth with a coronal of teeth, | 38. Trypanosphæra. | ||||||
Tubuli irregularly branched, each with two to four or more openings, | 39. Caminosphæra. | ||||||
Outside of the shell with irregular radial tubuli, open on both ends, with fenestrated wall. | Mouth of the tubuli truncated, smooth, | 40. Solenosphæra. | |||||
Mouth with one single large tooth, | 41. Otosphæra. | ||||||
Mouth with a coronal of teeth, | 42. Coronosphæra. | ||||||
II. Subfamily Clathrosphærida. (Lattice-shell double, with an external mantle of network.) | Surface of the outer shell smooth, | 43. Clathrosphæra. | |||||
Surface of the outer shell thorny, | 44. Xanthiosphæra. |
Subfamily Acrosphærida, Haeckel, 1881, Prodromus, p. 471.
Definition.—Collosphærida with one simple lattice-shell around every central capsule of the cœnobium.
- ↑ Loc. cit., p. 535, Taf. xxxiv. fig. 1.