444 



Species 



Reef 



Litho- 

 thamnion 



Meters 



io — 50 50 — 100 100 — 200 



200 — 400 



I 

 2 

 I 



I 

 I I 



malleodigitus (Sp. Bate) var. gracilicarpus 



[de Man 



microrhynchus de Man 



microstylus (Sp. Bate) 



microstylus (Sp. Bate) var.? 



Miersi Cout 3 



pachychirus Stimps 2 



pacificus Dana 



paraculeipes Cout 



paradcntipes Cout 



paralcyone Cout 7 



pareuchirus Cout — 3 



pareuchirus Cout. var. imitatrix de Man . 

 pareuchirus Cout. var. Leucothea de Man . 



parvi-rostris Dana 



parvus de Man 



Philoctetes de Man 1 



Polyxo de Man 1 



praedator de Man 



proseuchirus de Man 



pubescens de Man 



rapacida de Man 



rapax Fabr 



savuensis de Man 



Sibogae de Man 



spongïarum Cout 1 



Stanleyi Cout. var. dearmatus de Man . . 1 1 



strenuus Dana 4 1 



tenuicarpus de Man 



tenuipes de Man 



ventrosus H. M.-Edw 



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

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

 of the sea, like the plankton. But the fact that the iïrst 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 Alpkeus 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 only five of these are situated at depths exceeding 100 meters. The 

 greatest depth from which with certainty a species of Alpheus (A. macrosceles Alc. & Anders.) 

 was drawn up, proved to be 330 m. In another case (A. Hailstonei Cout. var. laetabilis de Man) 



312 



