. Fresh-water biology. Freshwater biology. THE LEECHES (HIRUDINEA) 655 30 (29) Complete somites of six unequal amiuli; salivary glands diffuse; gastric ceca seven pairs; caudal sucker with marginal circle of glands and papillae; eyes one pair, united; size small. Probably fish parasites. ActinobdellaMoore igoi . 31 31 (32) Sucker papillae and glands about 60; five series of dorsal papillae. Actinohdella annectens Moore 1901. Sucker papillae and glands about 30; median dorsal series of pa- pillae alone developed. Actinohdella inequiannulata Moore Fig. iooi. Actinobdclla inequian- nulata.
. Fresh-water biology. Freshwater biology. THE LEECHES (HIRUDINEA) 655 30 (29) Complete somites of six unequal amiuli; salivary glands diffuse; gastric ceca seven pairs; caudal sucker with marginal circle of glands and papillae; eyes one pair, united; size small. Probably fish parasites. ActinobdellaMoore igoi . 31 31 (32) Sucker papillae and glands about 60; five series of dorsal papillae. Actinohdella annectens Moore 1901. Sucker papillae and glands about 30; median dorsal series of pa- pillae alone developed. Actinohdella inequiannulata Moore Fig. iooi. Actinobdclla inequian- nulata. Aanulation, sensillae and dorsal cutaneous papillae of anterior twelve somites. Pos- terior end with sucker from the side. X 20. (After Moore.) ml' md dl dm 33 (2) Body divided into a narrow anterior and a wider posterior region; little depressed; eyes when present usually well separated; stomach usually with only a posterior pair of more or less coalesced ceca. Family Ichthyobdellidae . 34 34 (3 s) Complete somites of 12-14 very short annuli; no distinct lateral vesicles; eyes one or two pairs; size small. Parasitic on small fishes Piscicola punctata (yeinU.) i&ji. 35 (34) Complete somites of six annuh; strongly divided into two regions; lateral pulsating vesicles in somites XII to XXIII; eyes two pairs; size medium. Parasitic on Fundulus in fresh and salt water Trachelobdella vivida (Verrill) 1872. The anterior region is formed of eleven somites of which the first five comprise the head and the last three the clitellum, which is somewhat sunken into the widened posterior region. A little known leech which has been taken only in southern New England. Fig. 1002. Trachelobdella'vivida. Annulation from dorsum. Somites at the ends of the body are numbered and the annuli between which the male and female orifices lie are indicated. X 3. (After Moore.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
