259 



The rostrum of the specimen, long 10,5 mm., from Stat. 282 is slender, 7,5-times as 

 long as wide in the middle and extends to the end of first antennular article; lateral spines 

 also pointed, slender, one-fourth shorter than the rostrum, presenting the same form as those 

 of Syn. acaiithitelsonis (H. Coutiere, Alpheidae Maid, and Laccad. Archip. 1905, PI. LXXII, 

 Fig. 13'), but otherwise as in the quoted figure oi Syn. tuinidoinaiuis in the "Proceedings of the 

 U. S. National Museum". 



Antennular peduncle 5-times as long as thick at the apex of the second article; the length 

 of the visible part of the first article and that of the two following are in proportion to one- 

 another as 10 : 7 : 6; the second article is 1,4-times as long as thick at its distal end. As regards 

 the stylocerite and the antennal peduncle with scaphocerite and spines, this specimen resembles 

 the Fig. 5 in the "Proceedings". Carpocerite 4,5 5-times as long as wide in the middle; in a 

 lateral view the spine at the upper angle of the basicerite proves to measure one-third the 

 length of the lateral or lower spine. 



Unfortunately Prof. Coutiere does not mention the measurements of the telson and of 

 the legs of Syn. Uimidotnanns , so that it is impossible to decide whether they agree with this 

 specimen or not. The outer angles of the posterior margin of the telson are acute, spini- 

 form, but they are a little shorter than in the quoted figure. The arrangement of the 

 spinules of the upper surface is otherwise than in Svn. Thcophane. These spinules are namely 

 inserted much nearer to the lateral margins, the anterior pair a little before the middle; the 

 distance between the spinules of the anterior pair, the distance between those of the posterior 

 and the distance between the two pairs are in proportion to one another as 10:7:5, the spinules 

 of the anterior pair are comparatively farther distant from one another than in Syn. 

 Theophane. Merus of large cheliped 2,1 -times longer than wide, upper margin with a spiniform 

 tooth at the apex. Relative dimensions of large chela: fingers i; total length 4,75; height 1,7, 

 this chela being 2,8-times longer than high. The fingers are much shorter with regard to the 

 total length than in the species from the Persian Gulf which was referred by Nobili to Syn. 

 tumidoinanus, in: Bull. Scientif. de la France et de la Belgique, XL, 1906, p. 27. The anterior 

 margin of the palm is almost unarmed, presenting only a small, obtuse tubercle. The small 

 cheliped and the 2""^ legs are missing. For the measurements of the third and fourth legs I 

 refer to the Tables B and C. In both legs the propodus bears 8 spinules; those of the third 

 legs are 0,15 — 0,16 mm. long, those of the fourth are a little shorter. Measured from the base 

 of the anterior margin to the tip of the ventral hook, the dactylus proves to measure one-fifth 

 the length of the propodus, but it shows another form than that of Syn. Theophane. The 

 dactylus, indeed, has a less slender form, being in the third legs 2,6-times, in the fourth 

 2, 5-times as long as broad; the ventral hook, the length of which is in proportion to the width 

 at its base as 5:3, does not directly continue the posterior margin of the dactylus, but rejoins 

 it by a concave curve of short radius and the arcuate, anterior margin of this hook runs nearly 

 perpendicularly to the posterior margin of the dactylus; the dorsal hook is a little less 

 broad at its base, but one-fifth longer than the other, the two hooks are divergent, but the 

 narrow, inner angle of the notch is rounded, concave. 



In the other specimen which is 13,5 mm. long, the three frontal spines closely 



127 



