10 Memoira of the Imluin Mtiseum. (\<>i, \ 11, 



(fig. II, 1-3). In ChoitdntrrftfHilug thr lU'iitition in nomial. thouglt the right niitcrior 

 lower tooth i« less diHtiiu-tly tnluinnar thiin umuiI. In Vittdrx the dpntitinn is rf«lucod, 

 hut the (hmhlc origin <»f the lower of tho t\v«i ri'inaiiiing temiiiinl teeth may often bo 

 «*en, esiMH-irtllv in the right mamlihie of unworn >|>e<-inienH of V . agno»cendnB. The anterior 

 h»wer t<K»th of the left nitle is more coniral in thix genua, with dorKo-ventnil rather tban 

 nntero-laternl i-om|>reH.<<ion, though that of the left sjilc is still niuc-h broader than that of the 

 right ; and there is a more <»r le.H.H indistinct tuberrle at the base of thin t«Mith «>n both 

 m.»ndiblc!«. In Procitlrjoiiirs a\\ t rare of the ilouble nature of the two remaining ternjinal 

 teeth is lo««t. the anterior lower teeth «»f the two nides be<'ome Ktill more alike, iiml the 

 tulwrclo-H at their base btH«»me niore eonspieuou.s. 



Of the genera with m<» litied dentition in other familiex. Proculejiia has teeth exactly like 

 those of ProcM/<'/oi(/r», and the only ,H|H>«-ies of PuhliuM known to nie has teeth not unlike 



those of Vnidrx, but has no tra<e on either .si<|e of the 

 thinl terminal t«Mith and has more markedly 

 asymnietri<al anterior lower teeth. The teeth of 

 /Vori//»/.v, the most striking t)f all these genera, arc, 

 however, more puzzling. Superfirially they usually 

 resemble those <if Proculejoidea ; but U-tween what 

 would be the anterior lower tooth in that genusand 

 the large tubercle at its base there is onliniirily a s<*ar, 

 lef by the breaking away of a columnar tooth which 

 seems only to persist in imperfeetly hardened 

 specimens. This columnar tooth (see fig. ii. 4) has 

 the form of the type of anterior lower tooth charac- 

 teristic of the Americon series ; and it is impossible 

 to be sure whether tho tooth in front of it forms the 

 most anterior part of a single but highly complex 

 anterior lower t<K)th. or is a lowest terminal tooth, 

 V" 11 reduced in size and .'«ituate<l Iwhind and on the inner 



' V' '*.*' '^ side of the middle and upper terminal teeth as in the 



J I - .0), _ * • 



: / m^om (lutcii). I ndo- Australian series. 



/ / Ai. K*'4|». 



■ ' oml 

 mmIi. 

 '!•<■. 



The more tj-piral American and Ethiopian f«»rms can be di.stinguishe<l from each other 

 by tho prefonce of one or more pairs, respectively, of marginal tul>ercles between tho 

 anterior angles of the head; but this distinction «loes not at first sight api>car t«i be of 

 universal application, .since at leant two genera, Mttrorhinm and Strphntinrephaltis, which hove 

 Wen accept e<l as .V me rican. have the additional tuWrcles characteristic of African genera. 

 Zang. moriNiver. notes records of the American genus " Ptts.iohis " ( = l'opiliua of the pre.sent 

 paper) from tho Congo, Senegal and Madagascar ; an«l in the Van de Toll collerti«.n several 

 s{>eciniensof PeHlaMma Mnatlifincuit bear the reconl " B4»livia "; while of two .spocimons of 

 a now species of Krumomuf, de.s<ribc«l below under tho name E. trirhoatigmotde*, one bears 



