1902.] SPIDERS OF THE GENUS DESIS. 103 



Eyes (text-fig. 21, B) of posterior line slightly recurved, widely 

 sepai-ated, the laterals a little further from the medians than the 

 medians are from each other ; medians considerably smaller than 

 laterals, about four diameters apart and about five diameters from 

 the laterals ; laterals on each side subequal, about a diameter 

 apart ; anterior median eyes barely a diameter apart, at least three 

 diameters from the anterior laterals; ocular quadrangle about 

 one-third wider behind than in front, the anterior median eyes a 

 little nearer to each other than either is to the corresponding 

 latei"al ; distance between anterior and posterior median about 

 one-third of the distance between anterior median and anterior 

 lateral, and one-foiirth of that bet-sveen posterior median and 

 posterior lateral. 



Mandibles (text-fig. 21, A) normal in size and direction; fang- 

 groove armed behind with two teeth, the distal much the largest, 

 the proximal separated from it by a space which is equal to about 

 four times its own length ; anterior border of fang-groove armed 

 with 6-7 teeth, the distal near the base of the fang opposite the 

 interval between the two teeth of the posterior row, the remaining 

 5 or 6 remote from it, evenly spaced, the distal of the series rising 

 well behind the proximal tooth of the posterior row. 



Legs : 1st pair unspined, 2nd leg with three inferior protarsal 

 spines, one apical and two submedian ; tibia of 3rd and 4th with 

 a pair of inferior apical spines ; protarsi with two or three spines 

 at the base of the scopula and three at the apex, one median and 

 one on each side ; tarsi also with a few spinif orm bristles intermixed 

 with the normal bristles. 



Vulva (text- fig. 21, C) as in the other species, consisting of a 

 horny plate impressed with a heart-shaped pit which is wider 

 than long, marked posteriorly by a low median crest and bordered 

 by an upstanding edge which is posteriorly produced into an 

 angular process with rounded apex, and armed on each side with 

 a slender pointed process directed downwards and backwards. 



Measurements in mm. — Total length 11, carapace 5; 1st leg 18, 

 2nd leg 13, 3rd leg 10-5, 4th leg 13. 



Log. Australia : San Remo, Westernport Bay in Victoria {Miss 

 Kenyoii). 



Perhaps belonging to this species were the specimens recorded 

 from Port Jackson by Mr. Whitelegge, J. R. Soc. N.S.W. xviii. 

 pp. 162-323 (c/. suj^ra, p. 101). 



Concerning the habits of this spider. Miss Kenyon, to whom 

 I have gi-eat pleasure in dedicating the species, writes : — " During 

 a recent stay at San Remo, while turning over stones at low- 

 water in search of MoUusca, I noticed what seemed to be the 

 sea- worn shell of a Crepidula. Upon detaching the shell from 

 the partially submerged rock to which it adhered, I found under- 

 neath it the spider with its legs drawn backwards and its head 

 concealed under a, sheet of web which exactly resembled the 

 septum of the valve of a Crepidula, although the shell itself was 

 that of an Anomia. The spider was conspicuous from the intense 



