58 T. THORELL, 
In C. opuntie, as in most Epeiroidæ, the inferior tarsal claw has two 
comb-teeth in close juxtaposition, but in C. conica I have, as aforesaid, 
not been able to discover more than one distinctly developed tooth (and 
sometimes a very small point behind it) on that claw. 
Genus 4. SINGA (C. Koch). 1836. 
Deriv.: Ziyya, geogr. prop. name. 
Syn.: 1836. Singa C. Kocu, Die Arachn., III, p. 42 
1837.  ,  1iv., Uebers. d. Arachn.-Syst., p. 6 (ad max. part.). 
1861. d Wesrr. Aran. Suec., p. 56 
1864. Epeira Brackw., Spid. of Gr. Brit., II, p. 323 (ad partem). 
1864. Singa Srw., Hist. Nat. d. Araignées, p. 255 (ad max. part.). 
1866. , MENGE, Preuss. Spinn., I, p. 81. 
Type: Singa hamata (CLERCK). 
This genus, formed by C. KocH at the expense of WALCKENAER'S 
Epeira, is not ackowledged by BLACKWALL, but received by WESTRING, who 
however assigns it somewhat different limits from those given it by KocH 
(and SIMON), paying more attention to the form of the cephalothorax and 
abdomen and the consequent peculiarities in the animal's general appearance, 
than to the position of the eyes, which but slightly deviates from that of 
certain Zpeire, viz. those in which the lateral eyes, like those of Singa, 
are little, if at all, more distant from the intermediary eyes, than these 
latter from each other. With MENGE, we assign to Singa the same spe- 
cies that are referred to it by WESTRING, excepting S. prominens (and SS. scu- 
tifera WESTR.), for which MENGE has formed the genus Cerceis (Cercidia 
NOB.) The limits between Æpeira and Singa are however by no means 
sharply defined, and it is not without some doubts that I have here taken 
up Singa as an independent genus separate from Æpeira. As its type 
Koch himself gives S. hamata (CLERCK). Concerning this genus see also 
under Gen. Epeira (p. 53). 
Genus 5. CERCIDIA x. 
Deriv.: xeoxéc, shuttle. 
Syn.: 1851. Epeira Wesrr., Förteckn., p. 33 | 
1861. Singa ID., Aran. Suec., p. 56 (ad partem). 
1864. Epeira BLackw., Spid. of Gr. Brit., II, p. 323 | 
1) Uebers. d. Arachn.-Syst., loc. cit. 
