=== (355) 



Orbitae in mcdio vertice approx.imatac, fornicc com- 

 muni didymo feu pcr mcdium longitudinalitcr cxcauato , pro- 

 mincntinimae. Ponc orbitas vertex planus, vcrfus nucham 



inter crillas duas fcu carinas parallelas dcprcflus. 



1 



i 



Opcrculoritm lamina prior fubocularis patcntifTima, dc- 

 orfum obtnfe bidcntata, cxtimo angulo armata fpina vna bre- 

 viorc , fubulata, extrorfum. vcrfi, alteraque longirfima*, lineari- 

 fubulata, pcr ftrias fcabcrrima , intcriore latere vncis fcx, (in 

 finillra feptcm) hamata, et ita rctrorfum dirc<fla,vt cum com- 

 pare altcrius lateris fere parallcla rigcat. Pojierior vcl propria 

 operculorum lamina fubmucronato-acuta, infcriorc margine 

 fupra mcmbr. branchioftcgam mucronibus 2. brcuibus appro- 

 ximatis armata. Membrana branchialis laxa, illhmo adnata, 

 ladiis tantum 5. diftantibus inllruda. 



Pimiae peclorahs latiffimae, alacformes, totum hiatus 

 branchialis marginem fubtus coronantcs, mollcs, vai^iegaHer. 

 Temrales intcrmediac, fermc iugulares, angufliinmac, biradiatae. 



Corpus gracilc, e tercti adtcnnatnm, verfus caudam 

 comprcfl\im, alcpidotum, fcric vtrinque fecundum dorfum, a 

 finu br.tnchiali ad caudam longitudinnli , tuberculorum oflcorum 

 fcabrorum, fubimbricata. Pinnae dorfalcs ambo radiis ficxili- 

 bus, et vii cauda viuicgatac. 



V. 



C3'prinus Labco. 



Tab. XI. fig. 8- 9- 



Copiofus in Ononc, Ingoda ct Schilca, vcrofimillime 

 ctiam in rcliijuis pcr Amurcm in oricntaicm occanum efflucn- 



Y y 2 tibus 



