146 Bulletin Vanderbilt Marine Miiseum, Vol. VI 



Alpheus malabaricus, Hilgendorf, F., Monatsb. Kgl. Akad. Wiss. 

 Berlin, 1878, p. 832. 



Alpheus brevirostris, de Man, J. G., Journ. Linn. Soc. London, 

 vol. XXII, 188, p. 261 ; Zool. Jahrb. Syst. IX, 1897, p. 757. 



Alpheus, new species 



Material examined : One specimen with the great claw miss- 

 ing, of an apparently new species, taken in coral at Temukus 

 Roads, Bali, Dutch East Indies, October 25, 1931. 



Technical description: Rostrum acute, carinate apex ex- 

 tending as far forward as the base of the second antennular ar- 

 ticle and posteriorly carinate for about two-thirds of the cara- 

 pace, the carina being distinct for the entire distance ; anteriorly 

 it is separated on either side from the orbital lobes by a deep sulcus 

 that extends back as far as does the lobe. The orbital lobes are 

 large, rounded, each with a supracorneal spine, well developed, 

 acuminate, projecting beyond the frontal margin for a distance 

 equal to two-fifths of the projected portion of the rostrum. The 

 abdominal terga are widely rounded dorsally with deep laminae, 

 forming a capacious brood pouch. The telson is one and one-third 

 times as long as the preceding segment and about one and three- 

 fifths times as long as the proximal telsonic width, with the sides 

 moderately tapered, the distal margin bluntly truncate, armed 

 with two pairs of median lateral spines on the distal half of the 

 telson and on the distal margin ; this margin also has a fringe of 

 long close-set spinules. The uropoda are longer than the telson, 

 the slender ovate inner blade being one-fourth longer and the 

 wider, articulated outer blade being one-third longer. The latter 

 has a coarse black spine at the outer subdistal angle, a trisinuate 

 articulation extends inward obliquely from this point and has on 

 its proximal border on the outer half three to seven small spinules, 

 the articulation of this blade has its distal margin convex; both 

 blades are fringed with long setae similar to those of the telson. 



The antennulae have the first article 0.75 mm. long, reaching 

 as far forward as does the rostrum ; the second article is 1 mm. 

 long; the third article is 0.5 mm. long; the flagellum is two- 

 branched, the thicker branch extending to the base of the fingers ; 

 this branch is proxirnally thick and has multiplumose setae on 

 the lower surface of the thicker portion ; the longer inner branch 



