122 RECORDS OF THE AUSTRALIAN MUSEUM. 



provided proximally with an oval bladder (JiL), the long axis 

 of which is transverse ; immediately beyond the bladder, the 

 groove is angularly crooked and directed towards the base of 

 the first inner pi-ocess. Being rather shallow, tliis groove is 

 difficult to observe. Tracheal stalk long, slender, curved near 

 its end. 



One male and four female specimens from Mount Sassafras, 

 Shoalhaven. 



Ge)ius Dinematocricus, yen. noc. 

 Primary characters: — Gronopods as in EhinncricH^, with the 

 difference that the distal joint of the posterior pair ends in 

 one or two, more or less flagelliform, always gradually taper- 

 ing processes (PI. xvii., fig. 55 ; PI. xviii., figs. 63, 69). 



Secondary characters : — Labral setiferous dimples 2 -|- 2. 

 Mentum not divided. Antennse usual}' short. First somite 

 with rounded sides, falling short of the second somite. Scobina 

 present or missing. Pores located in the prozonite, close to 

 the transverse suture, which is more or less marked and may 

 fail entirely. Last tergite generally not overreaching the upper 

 angles of the anal valves. Sterna transversly striate. vStigmata 

 small. Legs short, usually destitute of setee except near their 

 distal ends ; usually padded in the male. 



Type species — Dhieiiiaforricas laiiceohil iif^, sp. nov. 



The representatives of tliis genus are very numerous; they 

 have hitherto been listed amongst the llJiiiiocrici, with which 

 they have, indeed, the most striking i-esemblance. It has been 

 found necessary to separate them generically on account of the 

 primary character lecorded above. Whereas, in liliiinirrictis, 

 the outer brancli of the posterior gcmopod gradually grows 

 wider distally, being truncate at the apex, with more or less 

 acute angles, in Dlveviafnrn'nif:, this same branch is graduU}' 

 tapering from tlie base, flagelliform or, very seldom (only three 

 aberrant cases known), digitifoi-m. Moi-eover, the seminal 

 duct seems to have a peculiar sti'ucture ; in lihinocn'cl, it is 

 known to be located in tlie inner branch, ahing the edge facing 

 tlie outer bi-anch, and to be a gi'oove the lips of which are 

 scarcely developed and pi'cssed tiglit one against the ottioi- ; a 

 sectioTi cut through tlie bi-anch shows tlie duct to be ciicular. 

 Ill I iiiifiiiiiliicrlcii.<, the duct is siiiiilinly located, but its lips are 

 larger, mor(< lamellar and appear less tightly fitted together 



