ИСТИНА

Protodrilus flavocapitatus Uljanin, 1877 and two unknown for the Northern Black Sea Protodrilus species are found in tidal coarse sand and gravel from Novyj Svet (the Crimea). Taxonomical position of two presumably synonymous species: P. flavocapitatus and P. rubropharyngaeus Jägersten, 1940 is discussed. The differences between these two species are mentioned in the shape and position of nuchal organs, ciliation of head and trunk and some characters of reproductive system. Protodrilus sp. from upper subtidal sand of Blue Bay (Gelendzhik) is possibly new to science. The worms could be well distinguished from the other species of the genus by possessing a pair of pigmented eyes on the dorsal side of the prostomium. Average length is 1.2 mm, width – 71.5 mkm. There are 11-25 trunk segments. Body segments are rather transparent. Epidermis contains numerous small nearly round glands and small bacillary glands. Pigidial lobes are elongated, narrow in the tip. Salivary glands extend at least into segments 4-5. Male fertile region begins in segment 9 or 10. Female fertile region begins in segment 6-9(10). There are 3-6 large eggs per segment, 3 posterior most segments usually without eggs. 6 pairs of oviducts were found in segments 12-17. Cocoon glands and dorsal organs are absent.