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U.S. NATIONAL MUSEUM BULLETIN 292 



Macrobrachium jclskii. — Chace and Holthuis, 1948, p. 23. — Holthuis, 1952, 

 p. 26, pi. 4: figs. a-d. 



Diagnosis. — Carapace with antennal and hepatic spines, without 

 branchiostegal spine. Rostrum reaching beyond end of antennal 



Figure 25. — Appendices masculinae {a-f, right second pleopods in mesial view; g-k, left 

 appendices masculinae of Dominica specimens in anterior view): a, Macrobrachium 

 acanthurus, specimen shown in figure 2Qb; h, M. carcinus, specimen shown in figure 21; 

 c, M. crenulatum, specimen shown in figure 22; d, M. faustinum, specimen shown in 

 figure 23; e, M. heterochirus, specimen shown in figure 24;/, M. jelskii, male (carapace 

 length 8.8 mm) from Paramaribo, Surinam (A. Reyne); g, M. acanthurus; h, M. carcinus; 

 i, M. crenulatum; j, M. faustinum; k, M. heterochirus. 



