558 Trxinsactions 



Plagusia chabrus (Linn.). 



Cancer chahrus Linn., Syst. Nat., ed. 10, p. 628, 1758. Plagusia cafensis 

 De Haan, Faun. Japon., Crust., p. 58, 1835; Fulton and Grant, 

 Proc. Roy. Soc. Victoria, 19, pt. 1, p. 20, 1906; Stebbing, South 

 African Crustacea, pt. 3, p. 47 (with synonymy and critical remarks), 

 1905. Plagusia chabrus Miers, Cat. N.Z. Crust., p. 45, 1876, and 

 Ann. Mag. Nat. Hist., ser. 5, 1, p. 152, 1878 ; Rathbun, Proc. U.S. 

 Nat. Mus., 38, p. 591, 1910 ; Stebbing, Annals South African Mus., 

 6, p. 322, 1910 (with further synonymy). 



One female specimen from Sunday Island. Mr. Oliver notes that only 

 one specimen was seen during his stay on the island. 



The species is widely distributed, and has been recorded from the Cape 

 of Good Hope, Australia, Tasmania, New Zealand, &c. 



Li his latest work, Stebbing, in deference to the opinions of others, 

 adopts the name Plagusia chabrus (Linn.) for this species, though he had 

 previously argued in favour of P. capensis De Haan. I am glad that it is 

 possible to retain the name by which the species has always been known 

 in New Zealand. 



Plagusia dentipes De Haan. 



Grapst^s {Plagusia,) dentipes De Haan, Faun. Japon., Crust, decas, 2, p. 58, 

 pi. 8, fig. 1, 1835. Plagusia dentipes Miers, Ann. Mag. Nat. Hist., 

 ser. 5, 1, p. 152, 1878 ; Grant and McCulloch, Proc. Linn. Soc. N.S.W., 

 32, pt. 1, p. 153, 1907. 



One male specimen, collected on the rocks betw^een tide-marks, Sunday 

 Island. 



This species is closely allied to the preceding one, but can readily be 

 distinguished by the spine on the lower distal angle of the merus in the 

 walking-legs and by the presence of a few small tubercles on the carapace. 

 The other differences pointed out by Grant and McCulloch seem hardly to 

 apply in my specimens ; thus, there is little difference between the front 

 in the two, and both have the whole carapace equally covered with short 

 hairs. 



Plagusia dentipes is common on Norfolk Island and also on Lord Howe 

 Island, but it has not been recorded from the main islands of New Zea- 

 land. 



Plagusia tuberculata Lamarck. 



Plagusia tuberculata Miers, Ann. Mag. Nat. Hist., ser. 5, 1, p. 148, 1878 ; 

 Lenz, Zool. Jahrb., 14, heft 5, p. 473, 1901 ; Rathbun, Proc. U.S. 

 Nat. Mus., 38, p. 590. 1910. Plagusia depressa tuberculata Rathbun, 

 Bull. U.S. Fish. Comm. for 1903, p. 841, 1906. Plagusia depressa 

 var. squamosa Grant and McCulloch, Proc. Linn. Soc. N.S.W., 32, 

 p. 154, 1907. 



Three fenuiles from Sunday Island. 



Widely distributed in Indo-Pacific region. Recorded from Hawaiian 

 Islands by Miss Rathbun, from Norfolk Island by Grant and McCulloch, 

 and U-om " Lower California to Chile " bv Miss Rathbun. 



