EATHBUN: DECAPOD CRUSTACEANS. 313 



height of the palm is a little greater than its superior length ; fingers irregularly 

 dentate and narrowly gaping for their basal half. Fourth leg a trifle longer than 

 first and 1^ times as long as carapace ; nierus joints with a blunt subdistal angle, 

 that of third leg widening in the middle portion ; propodus of last leg f as long 

 as dactylns, measured on outer margin. 



Abdomen of male subtriangular, with the margin from the third to the sixth 

 segment concave ; first segment widest, second next, third next ; first segment 

 crossed by a sharp, laminar, transverse crest ; suture between second and third 

 and between fifth and sixth straight, and suture between third and fourth and be- 

 tween fourth and fifth concave forward, so that segment 3 is wider in its outer 

 part than in the middle, and segment 5 is wider in the middle than at the sides ; 

 segment 7 subtriangular, sides concave, end rounded. 



Dimensions. — ^, length 13.5 mm., greatest width (at fourth tooth) 16.4 mm., 

 width between outer angles of orbit 14 mm., width of front on anterior edge 

 5.6 mm. 



Type 7242 Coll. Museum of Comparative Zoology. 



P. barbouri is the only Parathelphusa known with exactly five similar teeth and 

 no additional spinulcs. All the species with numerous (more than four) spines 

 and spiuules are restricted to the continents of Africa and Asia. 



PORTUNIDAB. 



Portunus sanguinolentus (Herbst). 

 Neptiinus sarifjidnolentus Alcock, op. cit., 1899, 68, p. 32. 

 Celebes: Makassar; I 9 ju^- 



Portunus pelagicus (Linne). 

 Neptunus pelagicus Alcock, op. cit., 1899, 68, p. 34. 

 Celebes: Makassar; 2(^juv. 



Charybdis cruciata (Herbst). 

 Charijbdis {Goniosoma) crucifera Alcock, op. cit., 1899, 68, p. 51. 

 Celebes : Makassar ; 1 small $ . 



Thalamita crenata Latreille. 



Thalnmita crenata Alcock, op. cit., 1899, 68, p. 76. 



Celebes : Makassar ; 1 9 • 

 Moluccas : Amboyna ; 1 9 • 



Thalamita prymna (Herbst). 

 Thalamita prymna Alcock, op. cit., 1899, 68, p. 78. 

 Dutch New Guinea : Sorong ; 1 (J . ^ 



