SPIDER CRABS.-- RATHBUN. I > 



Genus H VAST EN us, White. 

 HYASTENUS ni ACANTHUS, dc. H<nin. 

 Pi><a (Xa.riu) diacattthn, de Haan, Fauna Japon., Crust., 



1838, pi. xxiv., fig. 1 ; 1839, pi. xevi.. and pi. (i. 

 H i/asteuuti diacanthus, Grant and McCulloch, Proc. Linn. 

 Sot-. X. S. Wales, xxxi , 11)06, p. 32. 



Twenty-five miles south by east of Double Island Point r 

 Queensland. 33 fathoms ; one male, small and immature. 



HYASTENUS CONVEXUS, M'ur*. 



Hyn*t<nits (Chorilia) cotfve.rn.-s, Miers, Crust. Alert. I884 r 



p. 196, pi. xviii., figs. B. & b. 

 Hyastenus convea-us, Grant and McCulloch, Proe. Linn. Sor. 



N. 8. Wales, xxxi., 1906, p. 32. 



Twenty miles north-north-east of Double Island Point, 

 Queensland. 30 fathoms ; one o vigorous female. 



Genus PHALANGIPUS, Lalreille. 

 PHALANGIPUS AUSTRALIENSIS, sp. nov. 



(Plate vi.) 



Type-locality. Pl&tyTpns Bay, Queensland, 7-9 fathoms. 

 One male holotype. 



Additional material. A female also was taken in Platypus 

 Bay. 7-9 fathoms, on July 28, 1910 (No. 1, haul 2). 



Measurements. Male ho lo type, length of carapace on 

 median line 16. 7, length of horns 1.5, width of carapace 13.6, 

 length of cheliped 29, length of first ambulatory leg about 

 87 mm. 



Diagnosis. Rostral horns without accessory spinule. 

 Sinus of infraorbital margin U-shaped. A broad, arcuate lobe 

 on first abdominal segment in both sexes. 



Description. The spines and tubercles of the carapace are 

 arranged as in P. herbstii (Milne Edwards) 17 and P. arachnoides 

 (Latreille) : 18 the carapace is about the same shape as in 

 herbstii and the rostrum and its horns of similar length. 

 The principal differences are set forth in the table below. 

 For a. statement in regard to the older species of this genus, 

 see my forthcoming report on Philippine Oxyrhyncha in the 

 Bulletin of the U.S. National Museum. 



17. Ege.ria herbstii, Milne Edwards Hist . Nat. Crust., i., 1834, p. L>!)2. 

 Leptopus lotigipes, Uuerin, Icon. Regne Aniin., pi. x., tig. 3. 



18. Egeria arnclmoid^. Latreille- Tabl. Enoyc. Metli.. pt. xxiv.. 

 pi. cclxxxi., fig. 1. 



