i8 7 



been observed at Atjeh; Syn. hululensis Cout., finally, lias been recorded from th<: Red Sea, 

 the Indian Ocean and the Pacific as far as the american coast and will therefore certainly 

 once prove to occur also in the East Indian Archipelago. We may consequently also include 

 these five species and this variety in the Fauna of the Indian Archipelago and we come 

 then to the conclusion that t w o thirds of all the Indopacific species and two 

 t h i r d s of all the Indopacific v a r i e t i e s , that are known at present, are 

 inhabitants of the East Indian Archipelago. 



Fourteen species and five varieties are at present only known from the Indian Ocean 

 and, generally speaking, from the seas situated westward from the Archipelago. They are 

 the following : 



Syn. fossor (Paulson) 



Syn. merospiniger Cout. 



Syn. otiosus Cout. 



Syn. paraneomeris Cout. 



Syn. physocheles Cout. 



Syn. tri onyx Cout. 



Syn. triunguiculatus (Paulson) 



Syn. Mushaensis Cout. 



Syn. Paulsoni Nob. 



Syn. tricuspidatus (Heller) 



Syn. laticeps Cout. 

 Syn. lophodactylus Cout. 

 Syn. pachymeris Cout. 

 Syn. Sladeni Cout. 



Syn. Stimpsonii de Man var. Maldivensis Cout. 

 Syn. Paulsoni Nob. var. Kurracheensis Cout. 

 Syn. Paulsoni Nob. var. liminaris Cout. 

 Syn. Paulsoni Nob. var. Rameswarensis Cout. 

 Syn. biunguiculatus (Stimps.) Cout. var. exi- 

 lipes Cout. 



These 14 species and 5 varieties that hitherto have only been observed in the Red Sea 

 and the northwestern parts of the Indian Ocean, are probably confined to these seas though 

 the possibility of their existing also in the Indian Archipelago is, of course, not excluded. 



Syn. Albatrossi Cout. is a species only known from Laysan Island in the northern Pacific 

 and Syn. brachyecros Nob. only from Makatea, while Syn. Bakeri Cout. and Syn. Mac-Cullochi 

 Cout. are up to the present time only met with on the coast of South Adelaide, the latter, 

 however, also at Port Jackson. Syn. Latastei Cout., finally, inhabits the coast of Chile, but 

 exists perhaps also in the seas of Australia. 



There can be little doubt, however, that new researches, especially in the Pacific and in 

 the seas of Japan and China, will make us acquainted with other species of which we are at 

 present still ignorant. 



When looking over the new species and varieties discovered by the "Siboga", we call in 

 the first place attention to Syn. odontophorus, a form of the Comatularum group, noteworthy by 

 the prominent tooth with which the immobile finger of the large chela is armed. The 7 species 

 and 3 varieties of which the Comatularum group is at present composed, are all inhabitants of 

 the East Indian Archipelago, except only Syn. Albatrossi and Syn. Stimpsonii var. Maldivensis. 

 Among those species of the Neomeris group, in which the dactyli of the three posterior legs 

 are biunguiculate, Syn. Pococki is remarkable just by the form of these dactyli, because the 

 ventral hook is very short, measuring only one-eighth the total length of the dactyli : in the new 

 Syn. Iocasta, which is represented by numerous specimens, the dactyli have nearly the same form, 



SS 



