Df. BnVNClUlS GYRINORUM R.VN. ETC. 1 1 7 



Jjiaiicliialia iuuliiiinir ad exUciiiilaicm lil)ci'ain in rjualuor, ant 

 (juIiKjuo (ilameiita, cjnac ciiissime ncscunt el elonf^antur ea ta- 

 inen lalioiie, lit ])raiHlii,i aiiteiior siiperet taulilluin postcrio- 

 rum longilndine. Saiis poiro ex sc ]>atel Iiascf biamliias c<m- 

 slniclas cssc! a proiliiclioiiiixis ol (lM|)licaUoiiil)us ciilaiici.s, aiit 

 culaneo-iiiucosis , (jiiac liai>ciil In sc iniiiprcheiisa ^asa arterica 

 et vonosa coii)iiucla et llexa atliiisiar aiisainiii ant airuiuu 

 vasculanum, qiioriun app;\iili() euriicloiii afipaiitioiiis filaincu- 

 torum biaiidiialiiiiii oit'iiicin praclcrl. Cum aiiteiii iliac jam 

 pelluceuies jjianchiac jiiicroscopio inspicianlur, lurtc special ii- 



dcm condatus in vcsiculam se retipit , dum jam totuni ovum dr I'oi- 

 ma jit'iic li(|uida ail solidam seiisim deniigraiis ojjvojviliir cule , i'cm- 

 cpie cavilas dicta 8uaple luendirana niiu-osa. Quam vcro cavilalcui i- 

 Ifinta oljscrvalione compcri amplinri jdii.S([iiam ])ar csl, ft gcinicri I'c- 

 ro loUim occupai'e. Tunc islud prac cactciis iDajoicm cvoliUioncni 

 conseipiuluiii esse vidclur, alijue in co .sacjfissinic carina , aliacKpic ni>— 

 lae , in (pias sc induil gcnncn Ibrmam cnibryonis assumcns, dclinc- 

 ari vidcnlur. Scd processus t'ormalionis cilo consislit , el geiinen, scu 

 end)rio de dit; in diem niagis tunicscit, el peril llacc ii^ilur ])craniida 

 caviias niorbosa csl, ejusipu' niui.iiliido origincm diicil ex alrojdiia ant 

 dcl'cclu sul)Stanliac giaiiosac vilclli. At , cum normalis sit, lialjcl loluni 

 hacnrispherium supeiius, iinpic earn j)rominet vitellus, cl lorniam Ju- 

 nae cresccnlis ilia pracsci'crl, ciijus tnmen cornua extrcma vitlcnlnr 

 et suhirc aliijuanluluni hacniisplicrii }>ravioris. Quum cutis . (juac ali 

 liacmisplicrio lc\iori incijiil, cl paidlalini cxlti:tliUir ad allcrum liac- 

 niisplicrinm ( (piod cum onmc ii)sa Jion occupavcrit , vitellus clan^ 

 paid, ut ila dicam, pei' foramen magnum umljelicale , (juod iierleclio- 

 nc cutis sulliagaiile conlrahitiu', cl ol)lLleralur ), tolum t;cnue!i obdu- 

 xcril , tunc cavitas brancliio— ^ulluralis tenet Iiaenusplicriuni levius, 

 supcripie canj delincalur sulcus carinac , sub (pia insplcilur vas jiro 

 aorla jure nu'riloipie lialiiluui. (hiare liac i;\olulioiiis periodo cavilas, 

 lie tpia lixiidnuu', truiico rcsponilct ; scd cum carina incipial cxsiir- 

 i^cre et dislinj^ui , cl cum piodiicalur cauda , magisque caput evolva- 

 liu' , haecee cavilas scnsim ad aiilcriora pergit , el vitellus, ipii prac 

 ilia eral interior, posterior lit; ipsa aiilcm, [laullum eoarclata, (it an— 

 tci'iur. ( hia|)ri)|)lcr inter ca[)iil ct vilcllum locatur , ibiipu' protubcral 

 ulihupic in duas ciuiiienlias, el in cavitatcm branchio gultiiralcm c- 

 \idenlcr ilesinii ; nam duac ennncniiae sunt inilia branchiarum ex- 

 lernaruni , jam composjia , uL innid, a nu'iubrana mucosa eavitaleni 

 obvcslienic, ct cuic, ipias inter mendiranas cH'ormaniur in poslerum 

 arcus brancliialcs ct ansae vasculares^ <puie, cum magis mayisfnie cl- 



