44 



the torsion of the somatoc\-st. So was Diphyes dispar as it has a very remarkable shape and 

 is of larger size than an\- other DipJiyids in the Siboga expedition. Diphyes Xierstraszi too 

 was easily to be distinguished from the other Diphyids. But the following species Diphyes 

 indica nov. spec, Diphyes (Diphyopsis) nialayana nov. spec, Diphyes (Diphxopsis) Gege7ibauri 

 nov. spec form a natural group of closely related species. They are easily to be distinguished 

 one from the other as our figures demonstrate (compare PI. VII, figg. 53 — 57, PI. VIII, fig. 58) 

 but we tried fn-st to identify them with known Diphyopsinae, being reluctant to add more new 

 names unless inevitable. We thought first of all of the superior nectophores of Dorainasia 

 bojani Ch. when we examined the same in Diphyes indica. This niay seem strange as Chun 

 called Dorantasia bojani a Monophyid. But he only mentions (92 p. i 10) having captured them 

 together in the Pacific Ocean with Ersaea bojani. This does not imply that they belong to 

 each other. He never .saw any Ersaeids developing themselves on the stem oi Doramasia bojani. 

 In the description of Diphyes indica we will mention points of similarity between this species 

 and the latter. We also compared the descriptions of Diphyes serrata Ch. 88, 97 a and of 

 Diphyes Steenstrupii Ggbr. 60 with our new specimens Diphyes (Diphyopsis) nialayana and 

 Diphyes (Diphyopsis) Gegenbauri. 



Altogether the three new names are given with some hesitation. The not very perfect 

 state of preservation, the absence of inferior nectophores and of any well-preserved stem and 

 appendages leave room for some diffidence. We will however now pass on to their description. 



24. Diphyes indica nov. spec. PI. VII, fig. 54. 



Stat. 93. Pulu Sanguisiapo, Tawi-Tavvi-islands, Sulu-arcliipelago. Cat. 79 G. ale. 90°/^. 2 



specimens. 

 Stat. 118. Lat. i°38 N., Long. I24°28'.2E. Cat. 93 B. A. ale. 90°,'^. One speeimen. 

 Stat. 205. Lohio-bay, Buton-strait. Cat. 50 C.B. ale. 90°/^,. 3 specimens. 

 Stat. 225. 5700 M. N. 279° E. from South-point of South-Lucipara-island. Cat. 45 A. ale. 90°/^. 



7 specimens. 

 Stat. 276. Lat. 6°47'.5 S., Long. i2S°4o'.5 E. Cat. 138 H. ale. 90%. One speeimen. 



All the specimens being preserved in alcohol 90°/^, we are sorry to say that there are 

 ncMie that are absolutely complete. First of all the inferior nectophores failed and of the superior 

 ones the stem was very much altered. .Still we find these 8 superior nectophores difterent from 

 the other Diphvids of the Siboga material. Their length is about 9 — 11 mm. the breadth 

 2 — 2'/., mm. They are very slender, elongated specimens. 



Taking them sideways (PI. VII, fig. 54) one is struck by the great similarity to the sketch 

 of Doramasia bojani Ch. 92 this doubtful Monophyid. The length of the cylindrical nectosac, 

 the position of the somatocyst and the hydroecium and even, though in lesser degree, the curve 

 which the five ridges describe in the upper third part of the nectophore are more or less similar. 

 But the lateral teeth of the ridges at the basal side are more developed, and more scale-like 

 than the Doramasia bojani. Sometimes, in Diphyes indica, these lateral teeth are so big that 

 they overlap the dorsal one. 



There is some resemblance too, we suppose, with Chun's Diphyes serrata (88) but up to 

 now we have no sketches of this species and the description is not cjuite complete. Moreover 



