45 



the curve in the upper part of the ridges does not occur in Diphyes serrata according to Chun 

 (88 p. 1858, 97a p. 26). The dorsal ridge of these 8 specimens is not serrated, the basal part of 

 the four others only slightly; the basal ones of the hydroecial cavity do not show any serrating. 



There is one specimen (Cat. 138 H.) the stem of which is yet clearly preserved. We 

 there notice the development of a bud, a future gonophore, but no traces could be found of a 

 bud for a young special nectophore in the oldest group of appendages. 



So we use here the genusname Diphyes, although the shape of the nectosac is the same 

 as Haeckei. 88 b describes for Diphyopsis. 



25. Diphyes (Diphyopsis) uialayana nov. spec. PI. VII, figg. 55, 56. 



Stat. 117'. Lat. i°is'N., Long. I23°37'E. Cat. 119 A. formald. 4^/°. One superior nectophore. 

 Stat. 185. Lat. 3°2o'S., Long. I27°22'.9E. Cat. 100 A. (2). formald. 4%. 3 superiornectophores. 



Length of the superior nectophore 9 — 10 mm. We found some similarity between Diphyes 

 (Diphyopsis) malayana and Chun's Diphyes serrata (88). Unfortunately the two descriptions 

 (88, 97 a) are yet incomplete. In 1S97 he promises to give a more accurate description which 

 however, up to this time, has not yet appeared. Of the hydroecium he tells us that it shows 

 differences with the h)'droecium in Diphyes Steenstrupii, but he does not tell us which are these 

 differences. He even omits to give the different measures. The only characteristic o-iven, bv 

 which to our opinion Diphyes serrata differs from Diphyes Steenstrupii Ggbr. is the scale-like 

 shape of the lateral teeth near the velum. These are less well-developed, more elono-ate in 

 Diphyes Stccnstrtpii and in our Diphyes (Diphyopsis) Gegenbattri. We have often thouo-ht how 

 remarkably well the description of Chun's Diphyes serrata fits in with his description of Dora- 

 masia bojani Ch. But these are of course only suppositions. We hope that Chun will soon 

 provide us with a more complete description of both Doraniasia bojani and Diphyes serrata. 

 Our Diphyes (Diphyopsis) malayana is to be distinguished from Doramasia bojafii, by the shape 

 of the upper part of the nectophore. 



In our species there are originally at the apex four ridges, but very soon the ventral 

 ridge divides itself into two. (Jne of these ridges forms the left lateral ridge, endino- in the left 

 lateral tooth near the velum, the other is part of the ventral facet; it is the most distallv 

 situated ridge in the nectophore. This is only on the left side; for if this division had also 

 occurred on the right side, there would have been six ridges. In Diphyes Steensti'upii, Gegenbaur 

 says that the ventral ridge divides itself sooner or later ("frliher oder spiiter"). This occurs 

 quite near the top in our new species but this makes no great difference. This division of the 

 four ridges into five, distinguishes our Diphyes (Diphyopsis) malayana from Chun's Diphyes 

 serrata which consists entirely of five ridges. 



The difference between Diphyes Steenstrupii and Diphyes (Diphyopsis) Gegenbauri lies 

 in the shape of the lateral teeth as is said above. They are very much developed and broad. 

 It differs from Diphyes iiidica through the absence of the wing-like enlargements in the upper 

 third part of the ridges; moreover the hydroecium-ridges are convex. 



The ridges in Diphyes (Diphyopsis) malayana are slightly serrated in the distal part of 

 the nectophore. The lateral teeth are much more developed than the dorsal one. 



