FiKUi'e 12. — l>o(Uiit<ri ill riinillii a. anterior end; Ij. spoon-sluiiied liook. Oiliiiiiii ii iiiirini iiii n. sp. c. anterior end; 

 (1. posterior view of 10th foot; e, thoracic hook; f, flail-seta from abdominal neuropodium; k. 6th abdominal foot. 

 Orhiiiia i-iacri h, anterior end; i. posterior view of 18th foot; j, thoracic hook; k, flail-seta from abdominal 

 neui'opodium; 1, posterior abdominal foot. Scoloplos cnpriisis m. anterior end; n, posterior view of 10th thoracic 

 foot; o, thoracic hook; p, flail-seta from alidoiiiinal neurojiodium; q. ."ith abdominal foot. 



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