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Show EClllNODER:MA T A. 346 observe two ran1iii.ed organs which may serve for respiration. The ova are contained in an oblong sac opening near the base of the proboscis. The Bonellire live at a considerable depth in sand, extending their proboscis to the water and even to the air above its surface when thBe. tvidireid iiss ,l oRwo.l ., Acad. of 'fur., XXVI, pl. xiv. It inhabits the Mediterranean( 1 )· TuALASSE:MA, Cuv. Where the body is oval or oblong and the proboscis in the form of a doubled lamina. or bowl of a spoon, but not forked. The intestinal canal resembles that of the Bonellire. They have but one abdominal thread. The Thalassemre are divided into THALASSEMA, proper, Where these two hooks are placed far forwa1·ds, and the posterior extremity is destitute of setre(2); and EoHIURUS, Where the posterior extremity is furnished with transverse ranges of setre.E . vulgaris; Lumbricus echiurus, Gm.; Pall., Miscel. Zool., XI, 1-6. Found along the coast of France in sandy bottoms. It is used as bait by fishermen. (1) In Rolando's description, the mouth is converted into the anull, and vice ver(s2a). T!tala8sema Neptuni, Gert., or Lumbricus thalassema, Pall. Spicil. Zool., fasc. X, tab. I, fig. 6;-Titalassema mutatorium, Montag., Lin. Trans., XJ, v, 26, may not differ from the preceding one. Al'OD.A.. 347 STERNASPis, Otto. Where, in addition to the riorly a slightly corneous di ksetre of the Echiuri, we obser s surrounded with cilia(l ). ve ante- ( 1) T ltalassema acutaium n semoi'des, Otto, Monog. ' anzan., Dec. I, pl. 1, £ 10-12, or Stj . A late examination of th tnalpt~ thalas-place. e Thalassemre has pl'oved to me that th1' s 1. s thel.l ' propel' |