قراءة كتاب Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
& Less. '74.
Diameter 25 to 80µ; pseudopodia twice as long as the body diameter; the plasm often contains chlorophyll bodies (Zoochlorella). The granular part of the gelatinous layer is thick (up to 10µ). The spine-like processes are very thin and short. (Schaudinn '95.) The marine form found at Woods Hole probably belongs to this species, as described by Schaudinn. The short pseudopodia which give to the periphery a fringed appearance are quite regularly placed in connection with the pseudopodia. The latter are not so long as twice the body diameter, the longest being not more than equal to the diameter of the sphere. The body inside of the gelatinous covering is thickly coated with bright yellow cells similar to those on Radiolaria. The animal moves slowly along with a rolling motion similar to that described by Pènard '90, in the case of Acanthocystis. Diameter of entire globe 35µ; of the body without the jelly 18µ. The extremely fine granular pseudopodia are 8 to 35µ long. Common among algæ.
This form was probably meant by Peck '95, when be figured "a heliozoön."
| Key to orders of Flagellidia. | |
| Small, body usually amœboid; 1 or more flagella; no mouth | Order Monadida. |
| Small; plasmic collar around the flagellum | Order Choanoflagellida. |
| With 2 or more flagella; one trails behind | Order Heteromastigida. |
| With 3 or more flagella, none of which trails | Order Polymastigida. |
| Large; firm body wall; 1 or 2 flagella; mouth or pharynx, or both | Order Euglenida. |
| Medium size; with chlorophyll, no mouth, usually colonial | Order Phytoflagellida. |
| Small; silicious skeleton; parasitic on Radiolaria or free | Order Silicoflagellida. (One genus, Distephanus Stöhr) |
| Key to the families of Monadida. | |
| No mouth; 1 or 2 flagella: amœboid with lobose or ray-like pseudopodia | Family Rhizomastigidæ |
| Mouth at base of single flagellum; plastic; no pseudopodia | Family Cercomonadidæ |
| One flagellum; inclosed in gelatinous or membranous cups | Family Codonœcidæ |
| One flagellum; tentacle like process at base of flagellum; inclosed in cup | Family Bikœcidæ |
| One main flagellum and 1 or 2 accessory flagella | Family Heteromonadidæ |
| Key to marine genera of Monadida.* | ||
| Family Rhizomastigidæ: | ||
| 1. | Flagellum repeatedly thrown off and reassumed | Genus *Mastigamœba in part |
| 2. | Flagellum never thrown off | 3 |
| 3. | a. Pseudopodia lobose | Genus Mastigamœba |
| b. Pseudopodia ray-like | Genus Mastigophrys | |
| Family Codonœcidæ: | ||
| 1. | Goblet-shaped cups adherent by stalk | Genus *Codonœca |
| Family Heteromonadidæ: | ||
| 1. | The long flagellum vibratory | Genus *Monas |
| 2. | The long flagellum rigid; shorter one vibrates | Genus Sterromonas |
| * Presence at Woods Hole indicated by asterisk. | ||
| Key to marine genera of Choanoflagellida. | |||||
| 1. | Without gelatinous or membranous test | 3 | |||
| 2. | With gelatinous or membranous test | 4 | |||
| 3. | a. | Attached forms: | |||
| 1. | Without a stalk, or with a very | ||||