26 



"lobe alphéopsidien" on the outer side is well-developed, but appears more rounded than in 

 the figure 228. The immobile finger is triangular and bears on the proximal half of the cutting- 

 edge (Fig. \2Ö) two small, little prominent teeth, of which the first, near the articulation, is a 

 little smaller than the other, while one observes on the middle of the fingers still the tracé 

 of a third tooth. The dactylus appears in the middle one-third higher than the immobile 

 finger, but at their base the latter appears one-third higher than the dactylus ; the dactylus 

 presents only one small, rounded tooth that fits between the two of the immobile finger. The 

 upper margin of the dactylus is regularly curved and provided with setae except near 

 the base, short setulae occur also near the cutting-edges of both fingers and a few setae are 

 found on the merus and the ischium. 



Of the following peraeopods only those of the 3 rd pair (Fig. 12 c) are preserved, they 

 agree with Coutière's figure 315 (1. c. p. 259). Ischium armed with 2 small spines; merus 0,92 mm. 

 long, 0,132 mm. broad in the middle, 7-times as long as broad; carpus 0,6 mm. long, two-thirds 

 of the merus, slightly thickened at the distal extremity, the width being here almost 1 L the 

 length ; propodus long 1,04 mm., a little longer than the merus, 0,09 mm. broad in the middle, 

 almost 1 2-times as long as wide and provided with 5 short spinules on the lower margin, 

 and with 2 longer ones at the distal extremity; dactylus 0,39 mm. long, a little more than 

 one-third of the propodus, 0,05 mm. wide at the base, slender, tapering, slightly curved. 

 Except the dactylus this leg is furnished with a few setae. 



18. Synalpheus amboinae (Zehntner). PI. III, Fig. 13, 13^. 



Synalplieus amboinae (Zehntner) J. G. de Man, Siboga Exp., Monogr. XXXIX a ] , Part II, 

 Family Alpheidae, 191 1 (text) p. 203, 1915 (plates) PI. VI, fig. 20, 20a. 



Stat. 89. June 21. Pulu Kaniungan Ketjil. Reef. 1 egg-bearing female. 

 Krakatau, 2 females without eggs, collected by Prof. SLUITER. 



1 very young specimen, collected August 1908 by Dr. VAN DER SANDE on a coralreef 

 near the northcoast of Flores at 8° 20' 28" S., 121° 36' 17" E. 



The egg-bearing female from Stat. 89 is 25 mm. long. The rostrum reaches just beyond 

 basal antennular article, the lateral spines extend to the middle of the visible part of it. This 

 specimen has lost the large cheliped, but bears still the smaller. Chela 5,2 mm. long, palm 

 3 mm., fingers 2,2 mm., palm almost one and a half as long as the fingers; the palm, 1,1 mm. 

 high in the plane of the fingers, appears almost 3-times as long as high. Ova numerous, small, 

 0,6 mm. long. 



The two females from Krakatau are 21 mm. and 17 mm. long. The latter bears still 

 the small cheliped, which resembles that of the female from Stat. 89. The large chela of the 

 larger specimen (Fig. 13, 13^) is 11 mm. long, palm 7 mm., fingers 4 mm.; the palm, 3 mm. 

 high in the plane of the fingers, appears a little more than twice as long as high ; of the large 

 chela of the other female the palm is 6 mm. long, the fingers 3 mm., and the palm 2,5 mm. high. 

 These numbers show that in not yet full-grown specimens the fingers are longer in proportion 

 to the palm than in the adult, for, according to Zehntner, in full-grown specimens which are 

 26 mm. long, the fingers measure hardly one-third the length of the palm (in the figure 23 



