The Atoll of Funafuti, Ellice group : its zoology, botany, ethnology and general structure based on collections made by Charles Hedley of the Australian Museum, Sydney, N.S.W.
Order Oligochæta. — Family Perichætidae
Perichæta grubei, Rosa.
Perichcæta Grubei, Rosa, Ann. d. ILK. Naturhist. Hofmus., vi. 1891, p. 395, pl. xiii., fig. 4a, 4b.page 393
Two specimens appear to belong to this species, they are not in a good state of preservation and it is impossible to make out some of the specific characters.
There are two specimens of another species of Perichæta probably introduced into the island. The only perfect example is 7·5 cm, in length, the segments are one hundred in number, the / shaped setae are 0·2 mm. in length, and number about 50 per segment. The dorsal and anterior spermathecal pores if present are very small, I failed to find them with a lens. The clitellum occupies the fourteenth, fifteenth, and sixteenth segments, the female pore is situated in a line with the setae on segment fourteen. The male pores occur on the eighteenth segment, they are transversely elongate and papillose, each pore is about 1 mm. in length, and the distance between their inner margins is about the same. The median ventral line bears eight papillae, there is one on each segment from fifteenth to twenty-first, the twenty-second being without; the remaining two are on segments twenty-three and twenty-four.
The dorsal surface is purplish-brown with green irridescent reflections, sides and under surface lighter.