444 



Species 



Reef 



LlTHO- 

 THAMNION 



Meters 



10 — 50 50 — 100 100 — 200 



200 — 400 



viallcodigitus (Sp. Bate) var. gractlicarpus 



[de Man 



microrliynchus de Man 



niicrostylns (Sp. Bate) 



niicrostyhis (Sp. Bate) var.? 



Miersi Cout 



fachvc/iinis Stimps 



pacificns Dana 



paraciileipes Cout 



paradentipes Cout 



paralcyone Cout 



parcuchirus Cout 



pareiicJiirus Cout. var. iutitatrix de Man . 



parcuchirus Cout. var. Lciicothea de Man . 



parvi-rostris Dana 



parvus de Man 



Philoctetes de Man 



Polyxo de Man 



praedator de Man 



proseucliirus de Man 



pubescens de Man 



rapacida de Man 



rapax Fabr 



savuensis de Man 



Sibogae de Man 



spongiaruni Cout 



Stanleyi Cout. var. dearinatus de Man . 



stremtiis Dana 



tenuicarpus de Man 



tenuipes de Man 



veiitrosus H. M.-Edw 



I 



12 



4 



I 



4 



Of the 53 species and 9 varieties, mentioned in this Table, only A. bicostaijis de Man 

 and A. pareuchirus Cout. var. Leiicothea de Man were also observed floating on the surface 

 of the sea, like the plankton. But the fact that the first named species was also drawn up two 

 times from depths between 10 and 50 m. and the second species two times from depths between 

 10 and 50 m. and three times from depths between 50 and 100 m. by bottom-nets, proves 

 positively, in connection with the other data, that the Indo-australian species of Alphetis are 

 truly bottom-living animals. They are besides inhabitants of shallow water, which is proved by 

 the following: representatives of the genus Alpheus were collected by the "Siboga" expedition 

 at 83 different stations, but oxAy five of these are situated at depths exceeding 100 meters. The 

 greatest depth from which with certainty a species of Alpheus {A. iiiacroscelcs Ale. & Anders.) 

 was drawn up, proved to be 330 m. In another case {A. Hails totie i Coui. var. lactabiUs de Man) 



312 



