1 1 1 



becoming detached, the gonopalpons and gonostyle perish. The distance between two siphons 



in the intermediate part between F and G measures lo cm. 

 G. Finally G (length 35 cm.) shows 7 siphons with their tentacles. A few gonostyles are 



still to be seen, but have been overlooked, whilst drawing PI. XIX. When we make the 



addition of the length all the different parts of Pterophysa grandis Fewk. Cat. 8 which we 



have described above we get the considerable amount of: 



26 cm. (A) + 38 cm. (B) -f 30 cm. (C) ^- 15,5 cm. + 33 cm. (D) ^ 42,5 cm. ^ 

 + 38,5 cm. (E) + 49,3 cm. + 38 cm. (F) + 31,5 cm. -f 35 cm. (G) = 377,3 cm. 

 The next in length to Pterophysa grandis brought home by the Siboga is Cat. g4 A.^ 

 which unfortunately does not show the same completeness as Cat. 8. The pneumatophore is 

 missing, and probably also the entire proximal part. The length of the stem is about 2,76 M. 

 There are 16 siphons attached to it, which are situated at great distances one from the other. 

 The first siphon begins },•] cm. below the beginning of the stem. It shows clearly the lateral ptera 

 and has a length of 47, cm. Its tentacle is well-developed and sometimes shows articulation. 

 The following 5 siphons are all still transparent and show nearly the same stage of development 

 as those in the distal part of C in Cat. 8. The most distal siphons of Cat. 94 A. hardly show 

 any sign of ptera. The tentacles are present everywhere, but no goiiodendra or any trace of 

 gonostyles could be seen. We suppose therefore that Cat. 94 A. is rather old, and that we found 

 the distal part, the proximal part having probably had a considerable length. 



Finally Cat. 21 A. (length 53 cm.) seems a portion of Cat. 8 A., resembling part of the 

 stem of the latter between D and E. The stem, however, is very much broader and flattened, 

 in some places even dilated like a flattened vesicle, and twisted. There are 1 2 siphons, which 

 have a length of 4 and 47, cm. and have accordingly a very muscular appearance. The ptera 

 are very clearly marked. Tentacles are situated on the base of every siphon, and at the same 

 spot there is a remnant of a gonostyle. On the whole it is as if Cat. 21 A. represents the 

 magnified part of Cat. 8 A. between D and E. 



58. Pterophysa (Bathyphysa) Stnderi nov. spec. PI. XX, fig. 149; PL XXII, figg. 153 — 155, 



157—159; PI- XXIII, fig. 165; PI. XXIV, fig. 171. 



Stat. 126. Lat. 3°27'.iN., Long. i25°i8'.7E. Depth 2053 M. Deep-sea trawl. On cable. Cat. 

 6 A. formald. 47o- One specimen (6 B. — G. parts of various Ptcrophysidae). 



Chun 97 a writes that the measures taken of the pneumatophore of Rhizophysa filiformis 

 showed unusual dimensions (length 12 mm. breadth 6 mm.). And he continues to say (97a p. 79) 

 "Das sind Dimensionen, wie sie unter den bis jetzt bekannt gewordenen Rhizophysiden nur durch 

 '^Bathyphysa Grimaldii iiberboten werden, deren Pneumatophoren bei den grossten Exemplaren 

 "nach den Angaben Bedot's 17 mm. misst". In 1904 Bedot writes of pneumatophores in 

 specimens of the same species of the length of 21 and 22 mm. and a breadth of 12 and 8 mm. 



In Pterophysa (Bathyphysa) Studeri the pneumatophore measures 35 mm. in length (taken 

 along the convex wall) and 20 mm. in breadth, rheasured proximally to the clusters of hypocystic 

 villi. The breadth-measure, however, cannot be considered absolutely accurate as the wall of the 



