4 G ZOOLOGISCHE MEDEDEELINGEN — DEEL IL 



unknown, yet it seems not improbable that they are partly occasioned by 

 disparity of age. 



Scape of cheli fores. We find the like differences with the segments 

 of the chelifores as with the segmentation of the trunk. Most species pos- 

 sess a scape, distinctly divided into two pieces; and the type of the genus, 

 Phoxichilus phalangioides, so correctly described by Latreille in 1818, 

 makes no exception. However, among the spoils of the Siboga-Expedition, 

 published in 1908, there were three animals with a totally undivided 

 scape. This quality was accompanied by an indistinct segmentation of the 

 body, by the possession of long auxiliary claws, and by the small ovigera 

 of the female, which have by ankylosis fewer segments than the normal 

 number of ten. At the time I included those forms in a new sub-genus 

 Rigoyia. At present already nine of them are known, which are marked 

 with an asterisk (*). But still others, as 16. P. sibogae, 29. P. fluminen- 

 sis Kr. and 31. the Japanese species from Sagami-Bay, agree in some 

 respects with Rigona (scape of chelifores inarticulate, strong auxiliaries, 

 ankylosis of female oviger); whilst the segmentation is quite distinct, 

 the trunk not being condensed. Comparative examination will be required 

 to make out the real significance of these differences. 



Where found. Pallenopsis-species are found everywhere, with the 

 exception of the arctic seas. The most northern are 5. P. plumipes Meinert 

 and 7. P. tritonis Hoek, both from the Atlantic ocean. The majority of 

 captures were made in southern regions, and especially the antarctic and 

 sub-antarctic seas prove to be the habitat of a good many of them. 



Owing to want of room not every locality has been inserted in the 

 list. And as we have to make allowance for the synonymy of several 

 species, it cannot be wondered at that some names have fallen out. Thus, 

 following the lead of others, I accepted P. patagonica Hoek to be the same 

 animal as P. glabra Möbius, as P. hiemalis Hodgson, and as P. patago- 

 nica, var. elegans of Hoek. In the same way P. gaussiana and P. seti- 

 gera of Hodgson are synonyms of P. vanhöffeni Hodgson. Finally, we 

 know almost for certain that P. holti Carpenter is the female of P. tri- 

 tonis Hoek. But on the other hand there are four authors who gave the same 

 name of P. fluminensis to four animals, most probably not belonging to 

 one species, i. e. : Kröyer, Böhm, Hoek and Schimkéwitsch. Though 

 they were taken into the list, yet a careful investigation of the types 

 will be needed to settle this question. For if we find for instance at 

 n°. 17 the feet to be covered by numerous long hairs (after Böhm), and 

 Kröyer (n°. 29) only mentions some rows of short hairs, there is reason 

 enough to be very sceptic about the species being identical. (Compare 

 Schimkéwitsch and Meinert). 



