STUDIES IN T AUSTRALIAN CRUSTACEA— McCULLOCH. 



313 



"C^t 



A lope australis, Baker. 



Alope palpalis, Haswell, Cat. Austr. Crust., 1882. p. 193 (nee. 

 White). 



Alope australis, Baker, Trans. Roy. Soc. S. Austr., xxviii., 1904, 

 p. 154, pi. xxx , tigs. 1-7. 



Obs. — Tliis is a very common species in rock-pools neur Sydney. 

 Mr. \V. A. Baker has kindly compared specimens from here with 

 his types, and confirms my identification. He adds that he has 

 overlooked the division of the ischium and meius or the second 

 pereiopoda into two joints each, they being obscure in his 

 specimens. 



Mr. G. M. Thomson has also compared others with those used 

 by him when writing upon A. p<il)t<il'ts, White, 6 and he has 

 favoured me with the following notes and sketches of the rostrum 

 of both species. 



The rostrum of A, australis (fig. 17, 1) is shorter than that of the 

 New Zealand species, and is armed with 

 six teeth above, as against 3-4-5 teeth in 

 A. palpalis (fig, 1 7,2-3). It is also a much 

 smaller species, the largest specimens being 

 one and ahalf inches long, while A. palpalis 

 attains two or three inches in length. 

 A. australis is marked with darker 

 spots and bars, while A. palpalis is of a 

 uniform whitish colour. 



The rostrum of A. australis is also subject to some variation, 

 some of my specimens having only four or five teeth; but they 

 are always equally spaced and not separated by wide gaps as in 

 the figures of A. palpalis. It should also be noted that A. 

 australis also fades to a uniform white after long preservation in 

 spirits. 



A. palpalis is therefore not an Australian species. 



Metapeneus monoceros, Fabricius. 



Penceus monoceros, Haswell, Cat. Austr. Crust., 1882, p. 200. 



Metapeneus monoceros, Alcock, Cat. Ind. Dec. Crust., pt. iii., 1906, 

 p. 18, pl.iii., fig. 7. 



Penams, sp., Whitelegge, Proc. Roy. Soc. N.S. Wales, xxiii., 1890, 

 p. 225 ; Whitelegge in Ogilby, Edible Fish, and Crust. N.S. 

 Wales, 1893, p. 203. 



Obs. — The specimens recorded by Whitelegge as an undescribed 

 species of Penceus are identical with the above. Though stated 



•"'Thomson— Trans. Linn. Soc, (2), viii., 1903, p. 440, pi. xxviii., figs. 3-12. 



