5°ó 



t 35- Alpheus sp. 



Stat. 51. April ig. Madura-bay and other localities in the southern part of Molo-strait. 

 54 — 90 m. Fine grey sand, coarse sand with shells and stones. 1 specimen. 



This specimen, perhaps a male, long 16 mm., appears closely related to A. tenuicarpus 

 de Man, hut I wish to describe it separately, because it shows some differences. 



The acute rostrum that reaches to the middle of the visible part of i st antennular article, 

 appears at its base slfghtly broader than it is long and the concavities at either side 

 are shallow, not so deep as in A. tenuicarpus and A. paralpheopsid.es. Rostral carina as in 

 A. tenuicarpus , telson also, but the spinules of the upper surface are a little farther distant 

 from the lateral margins. 



First antennular article a little shorter than in A. tenuicarpus, distinctly shorter than 

 the 2 nd , which, like in this species, is twice as long as thick and one and a half as long as 

 the 3 ld . Stylocerite, carpocerite and scaphocerite as in A. tenuicarpus. 



Merus of the large cheliped 4-times as long as broad, upper margin unarmed at apex, 

 infero-external margin serrulate, infero-internal margin with 2 aciculiform spinelets and ending 

 in an acute tooth. Chela 6,6 mm. long, about one-fourth longer than the carapace, its form 

 more si en der than that of A. tenuicarpus, because it is 4-times as long as high; it narrows 

 also in a less degree than in this species, with which it agrees for the rest, the palm being 

 4,6 mm. long, a little more than twice as long as the fingers. 



Unfortunately the smaller cheliped is missing. 



Carpal segments of 2 nd legs 1 mm., 1,22 mm., 0,44 mm., 0,44 mm. and 0,48 mm. long, 

 chela 0,85 mm. long (palm 0,36 mm., fingers 0,49 mm.), while the 2 nd segment is 8-times as 

 long as thick : these numbers prove that the carpus also much resembles that of A. tenuicarpus. 

 Legs of the 3 rd and 4' 11 pair similar to those of this species. Ischium with a movable spine. 

 Merus of 3 ld legs unarmed, 7-times as long as broad; propodus as in A. tenuicarpus, but 

 1, 4-times as long as the carpus ; dactylus two-thirds of the propodus. 



f36. Alpheus tenuipes de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1910, p. 288. 



Stat. 204. September 20. 4°2o'S., I22°58'E. Between islands ofWowoni and Buton; northern 

 entrance of Buton-strait. From 75 — 94 m. Sand with dead shells. 2 specimens, 

 one of which with eggs. 



A new species of the Insignis subgroup, closely related to A. paracrinitus Miers and 

 to its variety bcngalensis Cout. (Confer: H. Coutière, Alpheidae Mald. and Laccad. Archip. 

 1905, p. 901, PI. LXXXII, Figs. 37, 38). 



Rostrum triangular, acute, as long as wide at its base, a little shorter than half the 

 visible part of basal antennular article; rostral carina obtuse, short, reaching only to the posterior 

 end of the corneae and separated by feeble depressions from the orbital hoods that are rounded 

 and unarmed. Frontal margin almost transverse, orbits not prominent, the frontal margin 



2 Si 



