I'lIVLLOBEAXCHIATE CRUSTACEA -MACRUllA. 437 



following paii's have tlie propoda (fig. 10) fuvnished with numerous spines on the lower 

 margin, and the dactyla with a strong inner tooth. 



The last pair of pleopoda have the inner branch evenly rounded ; the outer (fig. 12) 

 crossed near the extremity by a strong diairesis, the outer margin of Avhich carries a 

 strong sjiine. 



The telson (fig. 11) bears two spines on its upp(>r surface near each margin ; its 

 truncate and slightly rounded apex is about half as wide as the base, and ends iu 

 a fringe of sette. 



o 



The following are the dimensions of a large male : — 



mm. 



*Eiitire leugtli 4g 



Length of carapace l,j 



Deptli of carapace K) 



Length of pleou 21 



,, 1st perciopod (left) 37 



,, propodos of same 22 



„ dactylos of .same 8 



„ 1st pereiopod (riglit) .3-1, 



„ propodos of same 18 



„ dactylos 10 



„ telson (J 



Habitat. This species occurs fairly commonly in the Xorth Island, and as far south as 

 Cook Strait and Tasman Bay. I have specimens from tlie following localities : — 

 Waiwera, Auckland, Hauraki Gulf {L. F. Ai/soii), Moko Hinau {Sandacjer), Portland 

 Island {Eohsou), Wellington Harbour {Fat-qiihar), and Tasman Bay, Nelson. I have 

 never obtained any specimens from the east coast of the South Island, the waters of this 

 part being more or less cooled by an Antarctic current, and Alpheus being apparently a 

 genus which loves the warmer seas. 



DlstrihiUion. Australia. 



Mature specimens sent me from Port Phillip by ]\Ir. S. AV. Fulton, and which are not 

 more than an inch (25 mm.) long, agree in nearly all details with the above, only the 

 large left hand is like those of my smaller specimens in having the rounded dactylos, the 

 supraorbital spines are much more produced (tig. S), and the extremity of the telson is 

 somewhat more rounded. 



In the 'Challenger' Macrura (p. 510), Spence Bate gives a list of species of Alphens, 

 and refers A. sociaJis to Australia, and ^L. chirayricus, M.-Edw., and A. vorcc-zealamluc, 

 Miers, to New Zealand. According to M. -Edwards (Hist. Nat. Crust, vol. ii. p. 351), 

 A. chirayi'icKs occurs in the s as of Asia, and I have seen no subsequent reference to its 

 occurrence in New Zealand. Pnnn thc^ brief description given by M. -Ed wards it is a 

 distinct enough species. 



* 111 all the rostrum-bearing species, 1 have measured the leiigdi i'rom tlie point of thi; rostrum to the 

 s.\ws. <>i the telsou. 



