10 



CARL CHUN. 



[REP. OF THE "MICHAEL SARS" NORTH 



had taken four specimens in the North Atlantic. The 

 specimens are in some cases only a little larger than the 

 specimen described by me. The arrow like slender shape 

 oi the body, and the slightly telescopic eyes possessing 

 two-stalked light-organs are, however, plainly recognisable 

 in all the specimens. 



Stat. 49 B. 3000 m. w. 



„ 51. 4000 — Gladius about 64 mm. 



„ 53. 2600 — 



„ 67. 1200 — Gladius 71 mm. 



ture in the specimen taken by the "Deutsche Sudpolar- 

 Expedition". 



Two larvae, the mantles of which are some 7 mm. 

 in length, exhibit such a marked likeness to the present 

 young specimen of Bathothauma, that I have no hesita- 

 tion in considering them as belonging to this species. 

 Even if they have shrunk to a certain extent, the position 

 of the fins, which are separated by the broad cone of 

 the gladius, and the extraordinary long and plump eye- 

 stalks plainly contribute to justify this determination. 



Galiteuthis Suhmii Hoyle (Taonidium). 

 Tcionius Suhmii Hoyle 1886, p. 192, pi. XXXII, figs. 5- 



-11. 



Galiteuthis (Taonidium) Suhmii Chun 1910, p. 382, pi. LIX. 



Stat. 64, 200 m. w. one specimen; the middle rows 

 of suckers in the club are just developing into hooks. 



Fig. 2. Bathothauma lyromma, juv. 

 Stat. 51. 



Bathothauma lyromma Chun. 



Bathothauma lyiomma Chun 1906, p. 86, 1910, p. 389, 

 pi. LV1, fig. 9, pi. LVII, figs. 1, 2, 

 pi. LVIII, figs. 6, 7. 

 Pfeffer 1912, p. 753. 



The rediscovery of this fantastically shaped Cranchiid, 

 possessing enormous arms, should be of considerable 

 interest. The specimen taken at Station 51, 700 m., has 

 a mantle-length of 21 cm, but shows perfectly well the 

 characters peculiar to the genus Bathothauma. As shown 

 in fig. 2 the fins are wide apart even in this young 

 specimen. The well preserved eyes posses enormous light- 

 organs and are located on straight stalks, which have 

 evidently been slightly damaged and broken during cap- 



MYOPSIDA d'Orbigny. 

 Spirulidae Owen. 



Spirilla australis Lamark. 

 Pis. I, II, figs. 2, 3. 



Some larvae of Spirilla must be counted among the 

 most precious spoils of the expedition. Being very 

 inconspicuous they are easily overlooked, but when more 

 closely considered they prove truly invaluable in extending 

 our knowledge of Spirilla. Some young specimens ap- 

 proaching in appearance the adult Spirilla are available 

 and we have finally a full grown specimen, mantle-length 

 26 mm., which, however, I regret to say, is somewhat 

 damaged. This valuable material, comprising 8 specimens 

 in all, was secured in the vicinity of the Canary Islands, 

 by the aid of plankton-nets. It contributes largely to 

 confirm the opinion, previously set forth by me (first of 

 all in my lecture on Spirilla to the Zoological congress 

 at Frankfurt 1909), that Spirilla by no means lives near 

 the sea-bottom nor, as is very often supposed, attaches 

 itself to rocks, but is a pelagic decapod, living in deep 

 water. Evidently Spirilla has a peculiar liking for the 

 Canary current. As long ago as 1836 the corvette "La 

 Recherche" took some very damaged specimens at the 

 surface evidently derived from great depths, which were 

 shortly described by Robert and also by Blainvi'lle (in 

 1837). Finally the only larval Spirilla described by Joubin 

 (Bull. Inst. Oceanogr. Monaco 1910) was also taken at 

 the Canary islands (Ferro), during one of the cruises of 

 the prince of Monaco. 



Before giving a short description of the larvae, aided 

 by reproductions I enumerate the examples captured: — 

 Stat. 34. 1000 m. w. Youngest larva, 6 mm long, with 

 5 visible chambers. 



„ 35. 2400 — Somewhat older larva with 6 

 visible chambers. 



„ 42. 900 — More advanced larva, total length 

 9 mm, 7 chambers visible. 



,, 45. 3000 Young stage, dorsal mantle- 



length 12 mm. 



