TMK MVKIAPODA OF NOIMIL AMKUK'A. 14.'^ 



Opixtlnitirfin Wood has priiicipally Im'imi Msnl in |»I;mm' o** Thfutitpn^ 

 tN'<-;(ii.s«> N«'W|»orl ltii>r«I liis ;4;<'iiiis upon an ciionrous rliai.K-tri' — tin* 

 |NM.s«'.HMion of an occIIuh. In liis itrsn iption of Tliratops, N«>\vport 

 Hjiys: "O.v/// diHtiiH'tV ; wliiUt in I lie ilc.S4'i-iption of its spi-rirs, he says: 

 ^'ihrU'iH inroHHitirHin^ hitrrnlihim." In tlicne two statcnuMits Newport 

 HiM'ins to contrailirt liiniself and to bt* unrntain aliont tlit^ |N»ss(>sHioii 

 of an ort'Iius. Piiilialdy Newport has mistaken an aecnniulation of 

 ])i^nient for an oeellus, anil his observations us to the piissessioii of an 

 ocelln«i an' ernmeous. at any ratr. 8ay <li«l not see a trace of an oeelliis 

 in tlie sanu' specimens. 



Tlie supposition tliat Ni'wpoit has made an erroneous observation is 

 furtliei stienj^theneil l»y the fact that tlie possession of an ocellus irt 

 the only dilference l)etween 77<fv//«>/w and (PitisUn nnf/n. Not withstand- 

 inji this erroneous derivations of Thentops, it must bi- used in place of 

 itpiHlhcmrijn. 



25t. MoNOfS. 



1847. — .l/oM'*;'* (lerviUM. Apti-rrs, iv, I'Ol (('ruptopH niijrn Ncwjiort). 



This nanu> was tirst used by IJillb. in ISi'O, as a ^'eiius of Crustacea, 

 and Monops (i<-rvais must ^ive place to another. 



:{o. itnvsiDA. 



ISIt. — llriinihiiDitomu N'c\v|Mirl. Iriiiis l.iiiii. Soc, \\\ {lithobiodeit). 

 W}'A. — I,'li!/Mi(l<i WoimI. .I<.mii. I'liilii. Arail. Nat. Sri.. JO. 



As litaiichiitstoma Newport is preoccupied l)y a ^enus of fishes, Dr. 

 Wood has j)roposed the nanu' Ixhysidn as a substitute, wliich we are 

 (Munpelled to us«' in place of Ihuinrliiosfomn. 



:>l. Uacktim. 



ISil.—Hettioxliiina Newport. TiMiis. Liiiii. 8oc., 21'> (triyonojtuda.) 

 1817. — Davetiiin Koch. Syst. Myr., 77 A 171 (lapetiHe). 



Because Hetirostoma Newport is preoccupied [Ileicroaioma Hart 

 niann, .\r(dl., 184'J) we must use its synonym, Dacetinn Koi'h, inste.id. 

 iNUIANA IJjN'IVEKSlTV, .luue 1, I.S8.S. 



