T922.] S. Kemp : Notes on Crustacea Decapoda. 219 



This, the only species of Periclimenes known from the Pacific 

 Coast of America, is very closely related to P. elegans ; in the 

 description which Holmes has given and in the additional notes 

 and figures supplied by Miss Rathbun I am unable to find any 

 differences worthy of note. In view of the widely distant localities 

 in which the two forms have been found, it seems unlikely that 

 they are specifically identical, but this can only be determined by 

 actual comparison of specimens. 



P. holmesi is known only from the Californian Coast, extending 

 from Santa Catalina I. to the Gulf of California. 



Periclimenes (Ancylocaris) amymone de Man. 



1902. Periclimenes amymone, de Man, Abhandl. Senckenb. natarf. 

 Ges. XXV, p. 829, pi. xxv, figs. 53a-g r . 



In this species, which I have not seen, the legs are conspi- 

 cuouslv stouter than in any of the related species. In the female 

 on which de Man's detailed description is based the carpus of the 

 second peraeopod is only about 2*4 times its distal breadth with 

 the merus 1*6 times its length. In the third pair the merus is 

 only 6 times as long as broad and the propodite is five times as 

 long as the dactylus. The dactylus is short and stout, scarcely 

 more than 3 times as long as its basal breadth. P. amymone also 

 differs from all related species in the absence of spinules on the 

 posterior border of the propodite of the last three pairs of legs. 



The species is recorded from Ternate. 



Periclimenes (Ancylocaris) demani Kemp. 



1915. Periclimenes demani, Kemp, Mem. Ind. Mus. V, p. 279, pi. xiii. 

 fig. 10, text-figs. 27 a-i. 



This species is related to P. grandis, but differs from it and 

 from all other species in the same 

 section of the genus in the structure 

 of the apex of the antennal scale : 

 the spine which terminates the outer 

 margin reaches only to, or to a very 

 small extent beyond the apex of the 

 lamella (text-fig. 64). It also differs 

 from P. grandis in having the carpus 

 of the second leg of the male as long 

 as the merus and in the proportionately 

 shorter chela, always less than 1-5 times 

 the length of the carpus and in the 

 longer and more slender legs of the 

 last three pairs. As in P. grandis the 

 anterior of the two pairs of spines 



on the dorsum of the telson is. placed Text-fig. 64.— Periclii 

 in the proximal half of the telson- demani Kemp. 



length. Antennal scale. 



C 514/1. Jack and Una Is., Mergui ' Investigator,' Dec, Or 



Archipelago. 1913. 



t me nes 



