30 



Proportion between the length of the telson and the width of the posterior margin 2,1, 

 proportion between the greatest width and that of the posterior margin 1,86; the dorso-Iateral 

 spinules of the anterior pair are 0,2 mm. long and the proportion between the length of the 

 telson and the distance of these spinules from the posterior margin is 1,58; the spinules of 

 the posterior pair are 0,23 mm. long and the proportion between the distances of both pairs 

 from the posterior margin is 1,81. According to the original description the spiniform postero- 

 lateral angles should not extend as far backward as the arcuate posterior margin of the telson 

 between them, in the present specimen, however, they project (Fig. 14) by half their length 

 beyond the posterior margin, exactly as in Syn. acanthitelsonis Cout. ; the longer terminal 

 spinules, long 0,38 mm., measure about two-thirds the distance between the postero-lateral 

 angles and project by three-fourths of their length beyond the posterior margin, being longer 

 and extending farther backward than in the typical hastilicrassus \ the outer spinules extend 

 by half their length beyond the postero-lateral angles. 



The larger cheliped is wanting. Alerus of the smaller cheliped 3,1 -times as long as broad,, 

 distal extremity of upper border truncate, unarmed. Relative dimensions of the .small chela: 

 fingers i, total length 2,5, height 0,8. The fingers are a little longer than the height of the 

 palm and the chela is 3-times as long as high. Merus of u"'^ legs 5,4-times as long as wide. 

 First segment of the carpus 4-times as long as thick at the distal extremity, a trifle longer 

 than the sum of the four following, 2°*^ segment a trifle longer than the 3'''^, that is as long- 

 as the 4''' ; chela nearly as long as the sum of the 2'"^ to 5''> segment, fingers about one and 

 a half as long as the palm. 



Relative dimensions of the 3'^'' leg: merus 2,75, carpus i, propodus 2,13, dactylus 0,4 

 (measured from the proximal end of the anterior margin to the tip of the ventral hook). 

 Merus 4, 3-times as long as wide, carpus 2, 4-times as long as thick at the distal extremity, 

 propodus 5,8-times as long as wide, dactylus 3-times as long as broad at base; propodus with 

 9 spinules, long 0,07 — 0,09 mm., besides the two at the distal extremity. Merus 1,29-times 

 as long as the propodus. 



Length about 10 mm. 



This specimen much agrees in its dimensions with the female from the same Station,, 

 described in 1 9 1 1 . 



Though the differences from the typical species presented by the telson are no doubt 

 individual, they are important enough for creating a proper name acanthitelsoniformis for this, 

 variety. 



22. Synalphcus sp. PI. Ill, fig. 15 — 15 c. 



Stat. 144. August 7/9. Anchorage north of Salomakiee-(Damar-)island. 45 m. Coral bottom 

 and Lithothamnion. i egg-bearing female. 



I do not succeed in identifying with certainty this specimen. The nearest related species- 

 are Syn. bitingiiinilatus (Stimpson) Cout. (H. Coutiere, Alpheidae Maid, and Laccad. Archip. 

 1905, p. 873, Pi. LXXI, fig. 8 — 8rt'), Syn. pachymeris Cout. (H. Coutiere, ibidem, p. 873, 

 Pi. LXXI, fig. 9 — 9 a') and the species which was referred by me to Syn. biunguiculatus (Stimps.) 



