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164 HlII.M:TI>f :M, UXITED STATES NATIONAL MUSEUM. 



.liidl mruHuremenU. 



U. 



From iii;i//;li- to iiiilciior (•Miilliiis t-yti ■ "<'-' 



From mii/./lc to rii'liis oris ' 



Fr Ill II //Ic to II xi Mil 



From iiiii//li' to ;,'ioiii '•''*; 



From mn//lr to |io.s|rrior nijirfj;iii vent "j'lti 



From imiz/lc to cml of (nil "''-I'' 



Lciij;lli foiv limli '"""_ 



I-iMi«tli foiv-toot "<'■-'"» 



LtMijjIh himl liml. "'"^ 



[.ninth liiiiil foot "04 



Width lift ween fxtcniiil niircs WOl 



Wiiltli liffwccii iiiti'nial riarcs , "'•! 



Will til lii'twccii caul li us oris <"••• 



Willi li lii'twciMi I i-ri at axilla •''•■-'7 



Width licrwi'cii ffiiiora at ;^i(iiii ""•'•'» 



TIlis i)('(!iilijii' siil;miiiii(l('r is |>iol»iii>l.v aqimtiti in its liiil>its. Tliis is 

 iiidiciitcd In- tlu^ (!(>iiiinv>s('(l liii like tiiil and the transparent |»al|U'- 

 hviVi. It is (|nite ole},'iiiit in its coloration. Nothing is known of its 

 iiabits, as it is as yet very rare in colhH'tions. IJcsidos thi' type siuicn- 

 nicn of llallowcll in tlic .Miisenin of the Academy Natural Sciences, I 

 have only seen the I'ollowinji-: 



No, 3!tt»r; two specimens ; (reurjjia; Dr. Joseph J<nie8. 

 (JYKINOPIIILUS Cope 



Proicid. Arail. I'iiila., Hii'.l, i». I118. 



Toiipfiie snpporttMl oidy hy the s'l*>ssoliyal |)edi(!el, holetoid ; craiiinni 

 tally ossified, the jiremaxillaiy hoiu's remaining; «listinc,t and enihracino; 

 a fontanelle. J)ij;ils entirely distinct, 4-."). 



This geinis is distin},niislied from Spelerpesjin act;onnt oftlie marked 

 pe(!iiliarity of the premaxillary hone, in wliich it resembles IMetliodoii 

 rather than the first named. Uiit inie species is as yet known. It has 

 u siiperfi(!ial resemhlaiice to tin' Spclvrpcs ruber, hut dillers in .several 

 osteoloftical peeiiliarilies. Its misal bones iire well separated, and the 

 pi()(>ti(;s(piamosal crests are peculiar. Tho anterior or proiitii! crest is 

 short, distinct, and carved inwards und backwards; that on the proxi- 

 mal extremity of tlu^ squamosal curves towards it, but leavi's si consid 

 eraitle intersjiace. This is occnpi(>d by two os.seous processes, like two 

 teeth of a comb. In S. riihcr the anterior crest only is pn'sent, and 

 forms a rectaii«!,le, tln^ anterior liiidi beinjjf transverse and the anj-le in- 

 wards. Tiie nasal bones also are in conta<;t across the prennixillary 

 spines. 



The type of the fienus remains for a more than usmilly long period in 

 the larval condition, and Just before its metamorphosis is jjenerally 

 identi(!al in its osteoloojical (iharacfi'rs with the jjonus Neeturns, except 

 in the absence of the intercilary bone, and tho number of posterior 

 digits. 





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