^53 



Frontal region, antennal and antennular peduncles fully according with Fig. i of my quoted paper 

 but the stylocerite reaches to the middle of the second article of the antennular peduncle and, 

 though the carpocerite appears, as in that figure, a little longer than the antennular peduncle, 

 the latter reaches just as far forward as the terminal spine of the scaphocerite. Telson 3,55 mm. 

 long, 2,6-times as long as the posterior margin is broad (1,36 mm.), greatest width anteriorly 

 2,1-times that of the posterior margin; there is no tracé at all of the anterior pair of spinules, 

 but quite rudimentary spinules of the posterior pair, only 0,08 mm. long, are present; 

 they are situated close to the lateral margins, their distance from the posterior margin is one- 

 fourth the length of the telson. 



In my description of 1888 the ventral hook of the dactylus of the third legs is said to be half 

 as long as the principal hook, but in this adult specimen it measures two-thirds of the latter. 



The male from this Station is 21 mm. long. The rostrum reaches nearly to the end of 

 first antennular article, the orbital spines are a little shorter; the stylocerite extends almost to 

 the middle of second article. The terminal spine of the scaphocerite reaches as far forward as 

 the antennular peduncle and is a little shorter than the carpocerite ; lower spine of basicerite 

 as long as first antennular article. Telson 3,25-times as long (2,86 mm.) as its posterior margin 

 is broad (o, 88 mm.), the width at base 2,55-times that of the posterior margin; in this specimen 

 traces of the anterior pair of spinules are also visible, situated about as far from the posterior 

 pair as the latter from the posterior margin. 



The male from Stat. 315 is 15 mm. long. The length of the telson equals just 3-times 

 its distal margin, while the width at the base is 2,35-times as broad as the posterior margin. 

 The rostrum reaches the end of first antennular article, orbital spines a little shorter. Stylocerite 

 not yet attaining the middle of second article. Dactyli of the third to fifth legs as in the preceding 

 specimens. The female from this Station is 21 mm. long. Rostrum, orbital spines and the 

 peduncles with the scaphocerite as in the male but the stylocerite reaches to the distal third 

 of second antennular article. The telson presents the same form as in the male. Posterior pair 

 of spinules on the upper surface visible, though rudimentary. Eggs not very numerous, those 

 of the female from Stat. 164 1 mm. long, those of the female from Stat. 315 0,7 mm. long. 



General distribution: Amboina (de Man); Lifu, Loyalty Islands (Borradaile). 



III. Patdsoni group. 



f22. Synalphetis tumidomanus (Paulson). 



Alplieus tumidomanus Paulson, Recherches sur les Crustacés de la mer Rouge, (en russe). Kiew, 



1875, p. 101, PI. XIII, fig. 2. 

 Alpheus tumidomanus H. Coutière, in: Proc. U.S. Nat. Museum, XXXVI, 1909, p. 24, fig. 5. 



Stat. 209. September 23. South point of Kabaëna-island. Reef. 1 female with eggs. 

 Stat. 282. January 15/17. S°25'.2S., 127°i8'.4E. Anchorage between Nusa Besi and the N.E.- 

 point of Timor. 27 — 54 m. Sand, coral and Lithothamnion. 1 specimen without eggs. 



It is with some doubt that these specimens are referred to Paulson's species, because 

 they do not fully accord with one another and because the eggs are not "very large", as 



they are described by Coutière (1. c). 



126 



