548 Tra/isrictioim. 



The largest of these is about 33 mm. in length, and agrees well with 

 the description of this species given by Thomson, the rostrum having 4 

 teeth, with a fairly wide interval between the second and third ; the ex- 

 ternal maxillipeds are greatly developed. In the other specimens, most 

 of which are considerably smaller, there appears to be considerable varia- 

 tion in the number of teeth on the rostrum : in one specimen 27 mm. long 

 the rostrum bears 6 teeth, somewhat unequal in size and a little unequally 

 spaced ; in other specimens there are only 4, and the interval between the 

 second and third varies in extent. Although none of the specimens are as 

 large as those sometimes met with in New Zealand, I prefer to refer them 

 to the same species. I am doubtful Avh ether Alope australis Baker is really 

 distinct from this species. According to Mr. McCulloch, A. australis is 

 common near Sydney Harbour. 



■Rhynchocinetes rugulosus Stimpson. 



Rhynchocinetes ruqulosus Stimpson, Proc. Acad. Nat. Sci. Philad., 12, p. 36, 

 1860 ; McCulloch, Rec. Aust. Mus., 7, p. 310, pi. 79, figs. 1-8, 1909. 

 Rhynchocinetes typus Miers, Cat. N.Z. Crust., p. 77, 1876. 



Three specimens from rock -pools, Sunday Island (Captain Bollons, 1907) ; 

 two smaller one from Meyer Island (W. R. B. Ohver). 



My specimens agree well with the description aiid figures given by 

 McCulloch, and, like his. differ from R. tyjnis Milne-Edwards in having 

 only about 6 teeth on the upper distal margin of the rostrum and 13 below. 

 The other differences given by Miss Rathbun (quoted by McCulloch) are 

 not very important, and some of them do not apply to my larger specimens, 

 in which the maxillipeds are proportionately longer than in smaller speci- 

 mens. In recording R. typus from Peru, Miss Rathbun (Proc. U.S. Nat. 

 Mus., 38, p. 562) gives the length as 11 cm. ; my largest specimen is about 

 5 cm. In larger specimens one would naturally expect the teeth on the 

 rostrum to be more numerous ; and evei;i if such large specimens are not 

 found in Australian seas (McCulloch does not give the size of his speci- 

 mens) it seems probable that R. typus and R. rugulosus are local varieties 

 of a species widely spread in the Southern Hemisphere. 



The species was included among the New Zealand Crustacea by Miers 

 under the name R. typus, on the authority of specimens in the British 

 Museum collections, though I am not aware of any specimens from the 

 main islands of New Zealand in local collections. It occurs at Sydney 

 and at Lord Howe Island. Milne-Edwards's specimens of R. typus are from 

 the Indian Ocean. 



Alpheus socialis Heller. 



Alpheus socialis Heller, Voy. " Novara," Crust., p. 106, pi. 10, fig. 1, 1865 ;. 

 Miers, Cat. N.Z. Crust., p. 82, 1876 ; G. M. Thomson. Trans. Linn. 

 Soc, Zool., 8, p. 436, pi. 27, figs. 6-12, 1903. 



Two specimens from under stones at low-water mark. Coral Bay, Sun- 

 day Island, collected by Mr. T. Iredale. 



These two specimens agree well with the original description given by 

 Heller, and I have no doubt they. belong to the species described by him ; 

 they also agree fairly well with the more recent description given by Thom- 

 son, but it is possible, as Stebbing has already pointed out, that more than 

 one species is included by him under this name. In one of my sp(>cimens 

 the right cheliped is the larger, while in the other it is the left ; Thomson 



