210 Records of the Indian Museum. [Voi,. XXIV, 



those %o which de Man and other authors have applied the name in 

 the absence of the spine at the distal end of the carpus of the 

 second peraeopods. In this respect his specimens agree with 

 Dana's description "carpus long, not armed or acute at apex." 

 According to Nobili de Man's specimens probably represent a 

 variety of Dana's species, but with this I am unable to agree. 



For P. ensifrons, as applied by de Man, Stimpson's name 

 grandis may be employed. This species differs from true P. ensi- 

 frons in possessing the carpal spine on the second legs and also in 

 the proportions of the merus and carpus of the same limb. In 

 P. ensifrons the carpus is decidedly longer than the merus (see 

 Dana's figure and Nobili's measurements), whereas in P. grandis 

 the merus in males is longer than, and in females equal to or a little 

 longer than the carpus. 



P. ensifrons was described from the Straits of Balabac, North 

 of Borneo and is recorded by Nobili from Beagle Bay, New Guinea 

 and from the lagoons of Amanu and Fakahina in Polynesia. 

 There does not appear to be any evidence that it occurs in the 

 western part of the Indo-Pacific region. 



Periclimenes (Ancylocaris) grandis (Stimpson). 

 (Plate VII, fig. 10.) 



i860. Anchistia grandis, Stimpson, Proc. Acad. Sci. Philadelphia, p. 39. 



1887. Anchistia ensifrons, de Man, Arch. Naturgescli. LIII, i, p. 545. 



1887. Anchistia ensifrons, Miiller, Verh. naturf. Ges. Basel VIII, p. 47 1. 



1894. Anchistia ensifrons, Ortmann, Jenaisch. Denkschr.VlW, p. 16. 



1902. Periclimenes ensifrons, de Man, Abhandl. Senck. naturf. Ges. 



XXV, p. 826. 



1905. Periclimenes vitiensis, Pearson, Ceylon Pearl Oyster Rep. IV , 



P'. 7?- 



1905. Periclimenes ensifrons, Lenz, Abhandl. Senck. naturf. Ges. 



XXVII, p. 80. 



1906. Periclimenes ensifrons, Nobili, Ann. Sci. nat., Zool. (9) IV, p. 49. 

 1915. Periclimenes ensifrons, Balss, Denk. math.-naturvi. Kl. K. 



Akad. Wien XCI, p. 26. 



The rostrum reaches to or a little beyond the end of the an- 

 tennal scale. In lateral view it is deep, more so in females than in 

 males ; it is straight at the base but in its distal half is directed 

 upwards, the upper margin being thus slightly concave. The 

 dorsal teeth are from 6 to 10 in number, 1 nearly always 7 or 8. 

 The posterior tooth stands on the carapace and is separated from 

 the next by a rather wide interval ; the second is placed above or a 

 little behind the posterior limit of the orbit; the foremost is very 

 close to the apex and often gives it a bifid appearance. In the 

 precise distribution of the teeth there is, as usual, some variation ; 

 frequently, and especially in males, four teeth are placed rather 

 close together above the eye, one or two near the apex and one mid- 

 way between the two groups. On the lower border there are from 



1 Of eighty-four specimens one has 6 dorsal teeth, forty have 7, thirty-nine 

 have 8, three have 9 and one has 10. 



