and are therefore clescribed as a variety, but the examination of a larger number of specimens 

 belonging to the typical form will perhaps once prove that the differences are only individual. 

 The largest specimens are a male from Stat. 260 and the egg-bearing female from Stat. 305, 

 which are respectively 17 and 19 mm. long. In the adult male the rostrum reaches almost to 

 the extremity, in the adult females just to the extremity of i st antennular article and the 

 orbital spines are slightly directed outward ; the frontal margin between the rostrum and the 

 orbital spines runs obliquely, different from the typical species (H. Coutière, Alpheidae Mald. 

 and Laccad. Archip. 1905, PI. LXXIV, Fig. 18). The 2 nd antennular article is slightly 

 longer than in the typical form, namely one and a half as long as the visible part of the 

 i st and 2,5-times as long as the 3 ld , the stylocerite reaches to the extremity of i st article and 

 the carpocerite is just as long as the antennular peduncle ; the scaphocerite is also as long as 

 the latter or hardly exceeds beyond it. The inferodateral spinule on the basicerite reaches to 

 the distal third of the visible part of i st antennular article. 



No spinules were observed on the upper margin of the merus of the larger cheliped, 

 but the inner margin of the ischium bears 2 and that of the merus 4 — 6 small movable 

 spinules. In adult specimens the larger chela is high er (or broader) than in the typical 

 species: in the adult male from Stat. 260 this chela is 7,75 mm. long and 31:1111. broad, the 

 proportion being 2,58; in the ova-bearing female from the same station the proportion is 2,76, 

 but in a younger specimen from Stat. 431 2,94. In the typical species, however, the proportion 

 between length and width of the larger chela is 3,33. One observes at the far end of the 

 lower border of the palm, near the base of the immobile finger, three or four small obtuse 

 tubercles, more obvious in the male than in the female. 



The smaller cheliped resembles that of the typical species, but the fingers are, in adult 

 specimens, not shorter, but very slightly longer than the palm which is also a little high er. 



Carpus of 2 nd legs as in the typical species, the 4 th joint being not shorter than the 

 2 nd ; usually the 2 nd , the 4 th and the 5" 1 joint are of equal length, rarely the 2 nd appears shorter 

 than the 4 lh . In the adult male from Stat. 260 the carpal joints are 2,12 mm., 1,04 mm., 0,6 mm., 

 1,02 mm. and 0,9 mm. long; the chela is 1,3 mm. long (palm 0,5111111., fingers 0,8 mm.); in 

 the adult, ova-bearing female from the same station these joints are 2 mm., 0,75 mm., 0,56 mm., 

 0,9 mm. and 0,84111111. long, the chela is 1,36111111. long (palm 0,6 mm., fingers 0,76111111.). For 

 the third younger specimen these numbers are 1,75 mm., 0,82 mm., 0,52 mm., 0,85 mm. and 

 0,8 mm., the chela is 1,1 mm. long (palm 0,46 mm., fingers 0,64 mm.) and for a young specimen, 

 10,5 mm. long, from Stat. 305 they are 1,3 mm., 0,56111111., 0,4 mm., 0,6 mm. and 0,6 mm.; 

 the chela is 0,88 mm. long (palm 0,36111111., fingers 0,52 mm.). 



In the adult male from Stat. 260 the propodus (2,8 mm.) of 3" 1 legs is but one-fourth 

 longer than the carpus (2,2 mm.) and this is also nearly the case in the ova-bearing female, 

 in which these joints are respectively 2,7 mm. and 2,1 mm. long; in younger specimens from 

 Stat. 305 the propodus appears one-third longer than the preceding joint, rarely even almost 

 one and a half as long. So in a specimen from this station the propodus is 2,14 mm. long, 

 the carpus 1,6 mm., in another 2,2111111. respectively 1,66 mm. ancl in a third the carpus is 

 1,12 mm. long, the propodus 1,6 mm. In the young individual from Stat. 282 the propodus 



