29 



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



140 D. ale. 90°/^. 3 incomplete specimens. 

 Stat. 106. Anchorage oft" Kapul-island, Sulu-archipelago. Cat.(^i R. formald. 4%. One specimen. 

 Stat. iiS. Lat. I'^sS N., Long. I24°28'.3E. Cat. 157 D. formald. 4°/^. One specimen. 

 Stat. 136. Ternate-anchorage. Cat. 67 B.E. ale. 9o7o- 2 badly preserved specimens. 

 Stat. 148. Lat. o°i7'.6S., Long. I29°I4'.5S. Cat. 160 D. formald. 4%. One complete, one 



loose gonocalyx. 

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



Cat. 148 B.B. ale. 9o7o- One specimen. 

 Stat. 172. Gisser; anchorage between this island and Ceram Laut. Cat. 42 D. formald. 4°/ . 



One specimen. 

 Stat. i89\Lat. 2°22'S., Long. 126° 46' E. Cat. 65 D.K. formald. 4%. 2 gonocalyces and Cat. 



127 F.E. ale. 90°/o- One specimen. 

 Stat. 194—197. (194= Lat. 1° 53.5 S., Long. 1 26° 39' E. 195 = Lat. 1° 55' S., Long. 126° 50'.; E. 



196 = Lat. i°52'.8S., Long. 127° 6' E. 197 = Lat. i°45'.3 S., Long. i27°8'.3E.). 



Cat. 75 B.C. ale. 90°/o- One specimen. 

 Stat. 203. Lat. 3°32'.sS., Long. i24°i5'.sE. Cat. 173 C.A. formald. 4%. One complete 



specimen, a loose 0^ and a loose 9 gonocalyx. 

 Stat. 2i5\West 1000 M. distant from North-point of Kabia-island reef. Cat. 128 E. ale. 90°/ . 



One specimen. 

 Stat. 217. Lat. 6° 40.6 S., Long. 123° 14.7 E. Cat. 168 C. formald. 4%. One specimen and a 



loose cT gonocalyXi 

 Stat. 220. Anchorage oft" Pasir Pandjang, West-coast of Binongka. Cat. "/j C. formald. 4°/ . 



2 specimens. 

 Stat. 245. Lat. 4° 16.5 S., Long. I30°I5'.8E. Cat. 143 D. ale. 90%. 3 specimens. 

 Stat. 276. Lat. 6°47'.5S., Long. 128° 40.5 E. Cat. 13SE. ale. 90°/^. One specimen. 



Abyla trigona. We want to give a detailed description of the superior nectophore as 

 it will be of much use for understanding the structure of the same in our Abvla Haeckeli. To 

 begin we give a short list of the measures in the difterent specimens. 



Length Breadth 



Stat. 118. Cat. 93 B.B 5'^ mm 4 mm. 



Stat. 203. Cat. 126D 5 mm 5 mm. 



Stat. 220. Cat. 77 B 3'/^ mm 3 mm. 



Stat. 220. Cat. 77 B 4", mm 4 mm. 



Stat. 223. Cat. 31 D 6 mm 5 mm. 



Stat. 224. Cat. 204 II mm 10 mm. 



Stat. 276. Cat. 138 D 4 mm 3'/, mm. 



The superior nectophore of Abyla trigona is of a bilateral symmetrical structure; it is 

 composed of 4 odd (A, CI, D, E) and three paired facets (F, F', G, G', H, H'). 



We begin with the former and we take as first facet the one situated at the base of 

 the nectosac, facet A; it forms a facet around its basal opening (textfigure 24). It is surrounded 

 by the ridges, i, //, h, g. The ridge / is situated on the most proximal side. Opposite is rido-e 

 g which belongs at the same time to the following facet E (textfig. 25). This facet is the most 

 proximal of all and is situated above the nectosac; it has an elongated four-sided shape; the 

 ridges are a little concave [d, k\ k, g). The ridge d of this facet is at the same time the ventral 

 ridge of the following facet D (textfig. 26). This ridge is an irregular he.xagon {d, c, c, b, b, a). 

 It is situated above the apex of nectosac and hydroecial canal. Apically is rido-e a the superior 

 point of the nectophore and the basal ridge of facet CI. 



