BOTTSETTUS. 1 9 



ruhtti'-riihjes. — Slightly varying according to species and indi- 

 viduals: — (1) In most species {11. Imchi, arahicis (soinctimes), 

 leschenavlti, semini(diis, anijjJexicaii.ilatns, celebensix) 4 + 3-)- 1 ; first, 

 ridge terminating at p\ or between c and p' ; second at p^ ; third 

 at front of p^ ; fourth at front of m', or betAveen p^ and m' ; fifth 

 afc m", or between m^ and nv ; sixth more or less closely behind m' ; 

 seventh far behind m" ; eighth situated at palation border. Some- 

 times the fourth ridge is interrupted in the median line, the formula 

 being 3-}-4-f-l ; this I have seen in B. lanosus, IL hraclnjotis, and 

 some individuals of li. leachi, and according to Bocage it is 

 (normally ?) the case in R. angolensis. A ninth, more or less 

 indistinct, ridge is occasionally detectable (formula 4 + 3-1-2, or 

 3 + 4 + 2 ; see R. angolensis). (2) In some species (R. agj/ptiacus, 

 often in arahicvs, rarel}- in amplfxicau(fatic) an additional divided 

 ridge is developed behind the sixth; formula 4 + 4 + 1 ; but the 

 extremities of this ridge are either connected with, or situated 

 closely behind, those of tlie sixth ridge. 



Head. — Muzzle proportiotiall}' somewhat shorter than in Eidolon ; 

 measured from front of eye to tip of nostrils shorter than (only 

 in R. lanosus almost equal to) distance from front of eye to 

 base of ear. Nostrils separated by a deep groove ; inner margins 

 moderately projecting. Inner margins of li])S Iringed with short 

 pa])il]8e. Median portion of tongue with oblique lows of rounded 

 papilla?, each papilla with three small, straight, sharply pointed, 

 backwardly directed horny spines. 



Ears. — Tip of ear-conch reaching hinder corner of eye : outer 

 much more convex than inner margin, tip rounded ; in some species 

 (7^. arabicu-t, angolensis. htnosus) a shallow, but distinct, emargina- 

 tion of outer margin below tip of ear. Antitragal lobe small, flatly 

 rounded (most sjiecies) or triangular (R. angolensis), in one species 

 (7^. hinosus) practically wanting. 



Wings. — Chief characters : second digit clawed ; membranes 

 from sides of dorsum and back of first or second toe. 



I'irst phalanx of first digit one and a half the length of meta- 

 carpal. Second digit subequal to (a little longer or shorter than) 

 third metacarpal. Third metacarpal from six to seven tenths the 

 length of the forearm, a little longer than fourth metacarpal, which 

 is a little longer than fifth. First ])halanx of third digit two third? 

 to tlircc fourths the length of the metacarpal ;■ second jihalanx 

 four fifths to six sevenths of metacarpal. First jihalanx of fourth 

 digit rather more than htdf of metacarpal : secotid phslunx a little 

 longer than first. First phalanx of fifth digit equal to, or a Tutle 

 less than, half of metacarpal; second phalanx a little longer or 

 shorter than first. See wing-indices, on p. 2<l. 



First digit included in the raenibrano by the metacarpal and base 

 of first phalanx. 9-15 long fascia' in the lateral membrane, 

 viz. 2-4 jMistaiiconeal, 7-13 preanconeal. 



Tail. — From less than one half to five sixths the length of the 

 hind foot ; basal portion connected with interfemoral by its dorsal 

 integument, terminal portion fr-'clv projecting. 



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