21 



usual course along the wall of the nectosac first superiorly, then laterally and shows the same 

 dilatation towards its base. The left lateral one goes first straight down, ends suddenly blindly 

 at % of the whole length of the nectosac. A side canal begins a little higher, goes on proximally 

 and bends itself. Its course is then a perfectly straight one; it ends in the same club-shaped 

 enlargement. All these enlargements are in connection with one another throuo-h a rincr-canal 

 which runs along the velum. We carefully looked over all the inferior nectophores (rt 20) and 

 always found this same structure both in small and in big specimens. We could not find any 

 other specific differences and so we do not feel justified to use two different specific names. 



The auioxids of Abyla pentagona " Aglaisma cudoides' Lkt. (53) have been described 

 so well by many authors that we need not repeat anything. We only want to give a sketch 

 of one of the 147 specimens captured by the Siboga and we wish to draw the attention to 

 the great conformity between the list of stations of Adyla pentagona and its cudoxid Aglaisnia 

 aiboides Lkt. The latter were nearly all of the same size. 



We will use Aglaisma cuboides in the description of Aglaismoides to compare the 

 differences between the Etidoxids of two so different Abylids. 



Abylopsis Ch. 



12. Abylopsis qnincunx Ch. PI. Ill, figg. 22, 23, 24, 25, 26, 27. 



= Abylopsis quincunx Ch. 88. 



= Abylopsis quincunx Bedot 96. 



= Abyla (Abylopsis) quincunx Ch. 97 a. 



= Abyla pentagona A. G. Mayer 1900. 



= Abyla quincunx A. Ag. et A. G. Mayer 98, 1902. 



Stat. 66. Bank between islands of Bahuluwang and Tambolungan, South of Saleyer. Cat. 



140 C. ale. 9o7o- 2 superior, one inferior nectophore. 

 Stat. 89. Pulu Kaniungan Ketjil. Cat. 48 D. formald. 4%. 2 superior nectophores. 

 Stat. 93. Pulu Sanguisiapo, Tawi-Tawi-isIands, SuUi-archipelago. Cat. 79 B. ale. 90%. One 



superior nectophore. 

 Stat. 96. South-east of Pearl-bank. Sulu-archipelago. Cat. 99 C. ale. 90°/' . 10 superior 



nectophores. 

 Stat. 104. Sulu-harbour, Sulu-island. Cat. 103 D. ale. 9o7o- One inferior nectophore. 

 Stat. 105. Anchorage oft' Kapul-island, Sulu-archipelago. Cat. 91 F. formald. 4°/ . 2 superior, 



2 inferior nectophores. 

 Stat. 118. Lat. i°38'N., Long. I24°28'.2E. Cat. 93 B.C. ale. 90%. One superior nectophore. 

 Stat. 121. Menado-anchorage. Cat. 39 C. formald. 47^. One superior nectophore. 

 Stat. 136. Ternate-anchorage. Cat. So R. formald. 47o. One inferior nectophore. 

 Stat. 138. Anchorage on the East-coast of Kajoa-island. Cat. 172 C. formald. 47 . One superior 



nectophore. 

 Stat. 144. Anchorage North of Saloniakiee-(Damar-jisland. Cat. 122 E. formald. 4°,' . 2 complete 



specimens, 6 superior, 6 inferior nectophores. 

 Stat. 146. Lat. 0°36'S., Long. 128° 32.7 E. Cat. 64 C. formald. 47^. 3 superior nectophores. 

 Stat. 165. Anchorage on North-east side of Daram-islands (False Pisangs), East-coast of Misool. 



Cat. 14S B.A. ale. 9o7o- One inferior nectophore and Cat. 164 J. formald. 47^. 



2 superior, one inferior nectophore. 



Stat. 169. Anchorage oft" Atjatuning, West-coast of New-Guinea. Cat. 55 F. formald. 47 . 



3 superior nectophores. 



