124 MR. G. W. SMITH AND DR. E. H. J. SCHUSTER OX 



Localities : — ■ 



1. Three female specimens and one male from a hill near Thorp- 

 dale, Gippsland (]V. Kershaio, iii. 90), with left chela larger than 

 right. These range in size from 70 mm. to 31 mm. Four small 

 specimens, ranging in size from 30 mm. to 18 mm., had the chelje 

 equal or subequal. 



2. Several specimens from Warragul, Gippsland. A large 

 female, 80 mm. in length, with right chela enlarged, 3. ix. 92 ; 

 and several specimens, some with right chela enlarged, others 

 with left, and some with equal chelee {Prof. B. Spencer). 



3. A large male, measuring 65 mm., with equal chelee, from 

 Moyarra, near Oultrim, S. Gippsland {Kitson, 1905). 



4. A male, measuring 50 mm., with right chela enlarged, from 

 Kongwak, near Jumbanna., S. Gippsland {Kitson, 1902). 



Remarlcs. This species was partly described and figured by 

 McCoy in MS. as Hemicirratuliis hystrix. Since it does not fit 

 in with the scheme of this memoir to place this species in a 

 separate genus, we have retained McCoy's MS. genei-ic name, 

 hemicij^ratulus, as the specific name. The species is a constant 

 and easily recognised one ; the chelse, as usual, are variable in 

 development, and the rostrum differs somewhat in the different 

 specimens. In the specimens from S. Gippsland the rounded 

 hump at the base of the rostrum extends rather further along 

 the rostrum than in the specimens from other parts of Gippsland. 



ENG^uscuNicutARiusErichson, (Pis. XXII, -XXV. figs. 39-47.) 

 Erichson, Archiv f, Naturg. vol, xii. p, 102 (1846); Von 



Martens, Monatsber, Akad.Wiss, Berlin, 1868, p, 619; Haswell,Cat. 



Australian Mus., Stalk- and Sessile-eyed Crustacea, p. 179 (1882). 



The posterior pleurobranch is present, and is the largest of all 

 four pleurobranchs, which increase in size from before backwards. 



The third maxillipede has a well-developed exopodite (fig. 46). 



The scale of the second antenna has a short terminal spine and 

 a well- developed inner lobe (fig. 47). 



The two flagella of the first antenna are nearly equal in length, 

 the outer flagellum being slightly longer than the inner. 



The upper or inner border of the propodite of the chela has a row 

 of five tubercles ; the lower or outer border is smooth. There is 

 a row uf feeble serrations on the inner border of the carpopodite 

 and on the upper border of the meropodite, but the chela on the 

 whole is very feebly tuberculated and compaiutively fi'ee from 

 hairs. There is. however, great variability in the chelse. 



There are no conspicuous sperm-receptacles in the female. 



The eyes are large and comparatively unreduced. 



The rostrum is straight, well-developed, and ends in a blunt 

 spine. There are two highly-developed tumid keels on its sides, 

 Avhich are continued a little way back on to the carapace. 



The thorax is less highly vaulted and more normal in shape 

 than in the foregoing species. 



