are somewhat stouter and the dactyli broader and more falcate in the figure of the French 

 author. That the latter referred his species to Elamena (which by the way is altered into 

 Elamené) is no objection to my presumption, for there is much reason to believe, that Milne- 

 Edwards on the same page wrongly regarded a d of Halicarcinus tridentatus as representing 

 the type species Elamena mathaei Rüppell, and so confused the diagnosis of his own genus. 

 Furthermore in the figure of E. quoyi the antennuies are not covered by the rostrum and 

 visible from above, the very character, that separates Hymenicus from Elamena. 

 Hab. New Zealand (Bay of Islands, Auckland and Cook Strait). 



3. Hymenicus haasti Filhol. 



1S85. Hymenicus ') haasti Filhol. Miss. ile Campbell, t. 3, prt 2, p. 402, pi. 47, f. 4. 



In this species the carapace is broadly triangular, whereas in the preceding species it 

 is nearly circular. The rostrum should be trilobate, the lateral lobes being exceedingly small, 

 according to the text, but in the figure it is triangular and acutely pointed. Another discrepancy 

 between text and figure is that in the former the carapace is stated to be 4.9 mm. long and 

 4.5 mm. broad, whereas in the figure (that is twice enlarged according to the explanation of 

 plates 2 )) these dimensions are much larger (16.5 and 15.5 mm. respectively. Carapace and 

 legs are said to be covered with hairs; the ambulatory legs are stouter and shorter than in 

 the preceding species. 



Hab. Cook Strait. 



4. Hymenicus australis (Haswell). 



1882. Hymenosoma australe Haswell. Cat. Austral. Crust, p. 115, pi. 3, f. 2. 



Haswell, who does not care to distinguish between the different genera of the family 

 (called by him Hymenicinae, notwithstanding his uniting all the genera in Hymenosoma), gives 

 but little information about this species, nor is his figure of great use. Contrary to the two 

 preceding species, the sides of the carapace are armed with two obscure teeth, the rostrum is 

 triangular, prominent, somewhat truncate at extremity, and the hands of the d are very high, 

 with a rather sharp border below. 



Hab. Williamstown, Port Philip (East Australia). 



5. Hymenicus edwardsi Filhol. PI. 1, Fig. 3. 



1S85. Hymenicus edwardsi Filhol. Miss. ile Campbell, t. 3, prt 2, p. 400, pi. 48, f. 7. 



A specimen of the Leiden Museum, from Auckland, s. n. Halicarcinus tridentatus, agrees 



1) Except in this and another case the author persists in calling the genus Hymcniscus, but this error is corrected in the 

 list of errata. 



2) There are further discrepancies in Filhol's paper between text and plates. Thus several figures are not at all referred to, 

 neither in the text nor in the explanation of plates; Halicarcinus tridentatus is, according to this explanation, represented on pi. 50, f. 3, 

 but in the text the figure is referred to Hymenicus cooki, and that Elamena ■whitei is figured on pi. 47, f. 2 — 3 is not mentioned in the 

 text (p. 403). 



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