In my work on the Decapoda collected by Captain Storm (I.e. 1897) nine specimens 

 of small size, one of which was provided with eggs, from Atjeh, were wrongly referred by me 

 to Syn. neomeris (de Man). At that time I still supposed that the quite different shape of the 

 dactyli of the }y^^ and 4* legs was due to their younger age: this mistake should not have been 

 committed, when Professor Coutiere's researches had then already been published. (Confer p. 2 1 3). 



Syn. neomeris (de Man) is in reality a quite different species, its telson is much more 

 elongate and the anterior pair of spinules are situated always posterior to the middle; 

 the second antennular article is somewhat longer with regard to the visible part of the first, 

 the third and the fourth legs show a much stouter shape, the propodi are always considerably 

 shorter than the meri and the shape of the dactyli is quite different ; the small chela has 

 a more slender form, the fingers are longer and this species attains a much larger size than 

 Syn. streptodactylus. 



Through the courtesy of Professor Coutiere I was able to study four specimens, two 

 of which with eggs, from the Maldive Archipelago, which in the quoted paper he has referred 

 to Sy7i. neomeris: these specimens, however, proved to belong to the variety streptodactyhis 

 of this author and not at all to the true Syji. neomeris (de Man). These specimens also agree 

 with one of the nine from Atjeh, which I have referred to Syn. neomeris in 1897: this fact 

 was already suggested by Coutiere in his work on the Alpheidae of the Maldive and Laccadive 

 Archipelagoes, 1905, p. 870. 



The size of the ova-bearing females is variable. So e. g. the female from Banda is 10 mm. 

 lon^r, its eofCTs 0,78 mm. longr; in the female from Stat. 282, that has the same size, the ova 

 are smaller, ochraceous, 0,6 — 0,62 mm. long, the female from Stat. 310, which is infested by a 

 Bopyrid, is 14,5 mm. long, while the ova on which one observes two black eye-spots, are i mm. 

 long; in the largest of all the specimens, the female almost 18 mm. long from Stat. 144, the 

 eggs are rather numerous and 0,78 mm. long, as long as those of the much smaller female 

 from Banda. , 



The numerous specimens collected by the "Siboga" show slight differences with regard 

 to the antennal and antennular peduncles; these ought to be described and I wish to compare 

 them with figure 61 of my (luoted paper of 1897: this figure represents a female oi Syn. 

 streptodactylus from Atjeh. 



The ova-bearing female from Stat. },}^ is 13,5 mm. long; it accords with the cited Fig. 61, 

 but the stylocerite hardly extends beyond the first antennular article and the carpocerite is 

 shorter, though still surpassing the antennular peduncle; terminal spine of scaphocerite as long 

 as the carpocerite. The )-oung specimens from the three following Stations agree with this 

 female, but in the specimen from Stat. 65'' the supraorbital spines project straight forward. 

 The female from .Stat. 7 1 agrees with the quoted figure, but, the carpocerite being also a little 

 shorter, the terminal spine of the scaphocerite extends much beyond it. This is also the case 

 in the female long 10,5 mm. from Stat. 86, in which the carpocerite is hardly longer than the 

 antennular peduncle; the stylocerite reaches almost the middle of the second article and the 

 three frontal spines are a little longer, while the supraorbital spines project straight forward ; 

 the lower spine of the basicerite appears a little shorter than the first antennular article. The 



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