172 Rev. 0. P. Cambridge on some new 



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Family Agelenides ? 



Nov. gen. Mutusca (nom. propr.). 

 Characters of the Genus. 



Cephalothorax moderately convex above, nearly round (in 

 fact, broader than long) behind, constricted laterally, but very 

 little produced before ; hinder slope short and abrupt, and 

 thence falling gradually to the eyes. 



Eyes eight, considerably unequal in size, very similar in 

 position to those of Enyo and Miltia ; six form nearly a circle, 

 with about a third part of its circumference wanting in front ; 

 a little way within this point of deficiency are two others, the 

 largest of the eight, round, and almost contiguous to each 

 other, the form of the rest being either oval or irregular. 



Maxillce strong, greatly enlarged, and roundly gibbous at 

 their base, obliquely and transversely impressed near the 

 middle, greatly inclined towards the labium, being, in fact, 

 a little behind that part where they approach it most nearly : 

 the palpi are inserted rather more than halfway towards their 

 fore extremities. 



Labium short and nearly quadrate, slightly rounded at its 

 apex. 



Sternum short, heart-shaped, and strongly indented between 

 the points opposite to the insertion of the legs. 



The legs were unfortunately all absent, except the basal 

 joints : these are very strong ; and their relative lengths are 

 4, 1, 2, 3 ,* the difference between 4 and 1 is scarcely perceptible. 

 It does not, however, follow that the relative lengths of the 

 entire legs should agree with those of the basal joints, though 

 they usually follow those of the femoral joints. 



The palpi are strong, and the digital joint has a strong 

 Ageleniform appearance. 



The abdomen is of moderate size, and oblong-oval in form. 

 The position and relative size of the spinners (of which only 

 four could be detected) is very characteristic and remarkable : 

 two, so short as to be scarcely perceptible, are in the usual posi- 

 tion just beneath the anus ; the other two, of which one joint 

 each only remained, are of great length, nearly cylindrical in 

 form, and strong, springing from underneath the abdomen not 

 far behind the spiracular plates, and, extending backwards in 

 close contact with the inferior surface of the abdomen, project 

 a little beyond its extremity : I could not ascertain certainly ; 

 but I suspect that a second joint, with perhaps a third, had 

 here been broken off. 



