PLATE XVIII. 



Fig. 82. Alpheus bicostatus de Man. All the figures are taken from the adult male from Stat. 205, except 

 82 i^ and 82/^ that are taken from the female from the same Station. Fig. 82 frontal and antennal 

 region, X 10 ; 82a lateral view of the anterior part of the carapace, X lO; 82^ telson '), X lO; 

 82 f large cheHped, outer side, X 10 ; 820' large chela, lower side, X lO; 82,? small cheliped, 

 outer side, X 10 ; 82/ small chela, lower side, X 10 ; 82_o- small cheliped of the ova-bearing 

 female, outer side, X 10 ; 82/! small chela of this female, X lO; 82/ right leg of the 2nd pair, 

 X 10 ; 827 leg of the y^ pair, X 10 ; 82,^' leg of the 4th pair, X lo. 



Fig. 83. Alpheus Philoctetes de Man, frontal and antennal region, X 25; 83 « telson, < 25; 831^ small 

 cheliped, inner side, X 15; 831: small chela, outer side, X 15; 83a' leg of the 2n'i pair, > 25; 

 83 f leg of the y^ pair, X 25. 



Fig. 84. Alpheus tenuicarpus de Man. The figures 84 — 846" are taken from the male from Stat. 144, the 

 figures 84/ and 84^ from another specimen, probably also a male from the same Station. — 

 Fig. 84, frontal and antennal region, X 20 ; 84^ telson, X 20 ; 84^^ large cheliped, looked at 

 obliquely from the lower side, X lO; 84c small cheliped looked at in the same manner, X 10 ; 

 %d,d small chela, upper side, X 10. 



l) The telson, which has not been described in the text, is 2,8-times as long and 1,425-times as wide anteriorly as the posterior 

 margin is broad. The spinules of the upper surface are rather large, situated nearly as far from the median line as from the lateral 

 margins; the anterior pair are situated somewhat before the middle, while the posterior pair are somewhat farther distant from the posterior 

 margin as from the anterior pair. 



