( ( In ( the ( female ( anemone mysid ) ) ) ) ( , ( ( some ( of ( the ( thoracic legs ) ) ) ) ( ( are ( modified ( to ( form ( ( a ( brood pouch ) ) ( ( in which ) ( ( the eggs ) ( are ( carried ( until ( they hatch ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (JJ female) (NN anemone) (NN mysid))) (, ,) (NP (NP (DT some)) (PP (IN of) (NP (DT the) (JJ thoracic) (NNS legs)))) (VP (VBP are) (VP (VBN modified) (S (VP (TO to) (VP (VB form) (NP (NP (DT a) (NN brood) (NN pouch)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT the) (NNS eggs)) (VP (VBP are) (VP (VBN carried) (SBAR (IN until) (S (NP (PRP they)) (VP (VBP hatch)))))))))))))) (. .)))
In the female anemone mysid, some of the thoracic legs are modified to form a brood pouch in which the eggs are carried until they hatch.
(ROOT (S (S (NP (NP (DT Some) (NN species)) (PP (IN of) (NP (NN fish)))) (VP (VBP carry) (NP (PRP$ their) (VBN fertilized) (NNS eggs)) (PP (IN in) (NP (PRP$ their) (NN mouth))) (SBAR (IN until) (S (NP (PRP they)) (VP (VBP hatch)))))) (: ;) (S (NP (DT this)) (VP (VBZ is) (VP (VBN called) (S (ADJP (NN mouth) (JJ brooding)))))) (. .)))