BRACHTONUS. 339 



Fig. 6. Biarh. Patinam 1 organis rotatorlis exfcrti^) 

 liipinam, 

 7. ppMuni, 



g. orginis rotatoriis retraflis, 

 9. organis omnibus retraftis ?< inteftinis conrufis, 

 aufli magnitudinc, fiftunf. 

 a Organum roratoiium duplex exferrum. 

 b. Idem retraclum. c. I,obi. d. Lobuli. 

 e. Spiculum. f. Cauda g. Menibrana 

 crenulata h. Mulculus dcglutorius. 

 10. Marculum deglutorium valde auQum fiftit. 

 i. Ch;laj aperta:. k, claufa;. 



563. BRACHIONUS clypeatus. 



Brachiovus univalvjs tefta oblonga, apice emar- 

 ginata, baii incegra, cauda mucica. Tab. XLVllL 

 Fig. 11 — 14. 



Prima facie rcrcrt Brach. Patitiam, at non orbicularis, 

 fluviaiilis, & fat diverfus elt. 



Tefta ui?ivalvls, oblonga, flexilis, apiccm verfus, ani- 

 malculo protcnfo, aliquantum coarrtata, retraflo, emarginata 

 eft ac wqualis cum pofhca latitudinis, membranulaque incifurs 

 cbverfa inftruitur ; in quibusdam crylbllina elt & pellucidiffi- 

 ma, in aliis flavefcens, lubopaca; margines laterales ad tertiaiu 

 latitudmis partem inflexi lineas meras longitudinalcs ob nimi- 

 am teltx tenuitatem fimulmt. Tella animalculo retraclo clypc- 

 um mentitur. Animalculum elongatum tefls medium occupar; 

 protenfum apice pilos utrinque extrorfum flexos vix rotatorios 

 extendit, horumque in nicdio cilia minima micantia, retrattum 

 vero, pilisque conditis, in antica area hamos binos lineares 



U u 2 cxtrorfum 



