312 ON AN ABNORMAL PITflECIA SATANAS. * 



origin of the stylo-hyoideus ; s.h. m, its insertion ; s.h. m. t, its tendinous 

 edge (this, being deep of the muscle and ducts, is diagrammatically 

 represented by a dotted line) ; m.h, m.h', mylo-hyoideus, cut and reflected ; 

 s.g, sterno-glossus (cut short) ; g.h', genio-hyoideus, at its origin, cut short 

 and reflected ; h.g, hyo-glossi ; ep, epipharyngeus (Owen) ; hy, hyopharyngeus 

 (Owen); int > intercornualis; 1,2,3, the three ducts of the submaxillary 

 gland, converging to be surrounded by the stylo-hyoideus. 



Fig. 2. The same parts in Tamandua tetradactyla, enlarged. The letters as before, 

 excepts.h.m, stylo-hyoideus muscle, with its anterior tendinous edge (s.h.m.f), 

 blending here with the mylo- (m.h.} and genio-hyoid (g.h) muscles, and 

 surrounding the three submaxillary ducts (s.m.d], which are cut short and 

 reflected ; m.h', hyoid origin of the mylo-hyoid. 



3. Diagram to show the openings into the mouth of the three ducts of the 

 submaxillary gland in Myrmecophaga. a t b, the two ducts from the more 

 posterior parts of the gland, opening together ; c, the third duct, from the 

 cervical part, opening posteriorly to the other two ducts. 



5 2- NOTE ON AN ABNORMAL SPECIMEN OF 

 P1THECIA SATANAS* 



A YOUNG male specimen of PitTiecia satanas, which was lately forwarded 

 to the Society's Gardens, and died shortly after its arrival, presented an 

 abnormal condition that is perhaps worth recording in the Society's 

 c Proceedings.' 



The peculiarity consists in the completely " webbed " condition of the 

 third and fourth digits of the manus on each side, these two fingers 

 being completely connected together down to their tips by a fold of nude 

 skin, and with their nails closely apposed, though not connected, along 

 their contiguous margins. The other digits of the hands, as well as all 

 of those of the feet, are quite normal, the webbing of them not extending 

 beyond the middle of the first phalanx. 



The case is interesting, partly as affording an excellent instance of an 

 abnormal condition affecting homologous parts of opposite sides in an 

 exactly similar way, and partly as showing that the lower Primates are 

 subject, occasionally, to a condition of things which, as is well known, 

 also occurs not at all rarely in Man. 



* Proc. Zool. Soc. 1882, p. 442. Bead May 16, 1882. 



