P. L. KRAMP. 



(REP. OF THE "MICHAEL SARS" NORTH 



have realty been captured so far below the surface. The 

 1 in. ringtrawi caught 4 specimens at the surface; ac- 

 cordingly the species has been fairly common in the sur- 

 face-water. It seems reasonable, therefore, that the young- 

 fish trawl, which is a larger appliance, may have captured 

 a specimen of the Sarsia during the hauling up through 

 the upper strata. 



Oceania armata 

 — flavidula 



2. Oceania armata Kblliker. 



Kolliker 1853, Zeitschr. wiss. Zool., Bd. 



IV, p. 323. 



Gegenbaur 1856, ibid., Bd. VIII, p. 233, 



Taf. VII, Fig. 4. 

 Turritopsis armata Haeckel 1879, System der Medusen, p. 65. 



Callitiara polyophthalma ibid., p. 67, Taf. Ill, Fig. 1—5. 



Oceania armata Mayer 1910, Medusae of the World, p. 147. 



Stat. 53. Lat. 34° 59' N, Long. 33° 01' W (south- 

 west of the Azores), June 8th— 9th 1910, depth 2615— 

 2865 m. 1 m. ringtrawi with 200 m. wire.— 1 specimen, 

 height of the bell 7 mm. Hartlaub determ. 



This species is common in the Mediterranean, known 

 especially from Messina and Naples.— Vanhoffen 1 ) and 

 Mayer (1910) have demonstrated that Callitiara polyoph- 

 thalma Haeckel from the Canary Islands is identical with 

 O. armata. According to Haeckel each tentacle is pro- 

 vided with two ocelli, viz. one abaxial crescent-shaped 

 and one adaxial round ocellus; other authors mention 

 only the adaxial ocellus. In the specimens from the 

 "Michael Sars" no ocelli are visible. 



Geographical distribution: Mediterranean; At- 

 lantic near the Canary Islands and the Azores. 



3. Tiaranna affinis Hartlaub n. sp. 

 Plate I, fig. 1. 



Hartlaub 1913, Nordisches Plankton XII, I, 3, p. 269. 



Of this new species 7 specimens have been found 

 in the East-Atlantic basin (west of France) outside the 

 contour of 4000 m. 



Stat. 90. Lat. 46 G 58' N, Long. 19° 06' W, July 

 21st 1910. Young-fish trawl, 300 m. wire. — 3 specimens. 



Stat. 92. Lat. 48" 29' N, Long. 13° 55' W, July 24th 

 1910. Young-fish trawl, 300 m. wire. — 4 specimens, 

 treated with osmic acid or a similar fluid (Hartlaub 

 derterm. et descript.) 



Hartlaub's description of this species in the "Nor- 

 disches Plankton" is based on the specimens from the 

 last mentioned station (stat. 92). Unfortunately Hart- 

 laub has not seen the specimens from stat. 90. They 

 are somewhat larger and better preserved than the 



') Verhandl. Gesellsch. Dcutsch. Naturforseb. Arete, 64 Vers. 

 Abth. Sitz., 1902, p. 121. — 1 have not seen this paper. 



described specimens, and they have not been treated 

 with osmic acid (Hartlaub states, that the species has 

 a very intensive dark colour). Unfortunately I have 

 not been able to make a thorough comparison between 

 the specimens from the two stations, as the specimens 

 from stat. 92, sent from Hartlaub to me in Copenhagen, 

 arrived in a completely dried-up condition. 



The diameter of the three specimens from stat. 90 is 

 14 — 15 mm., the height of the bell about 12 mm. (in 

 the specimens described by Hartlaub the diameter as 

 well as the height was only 8 mm). The gonads and 

 the stomach ar well preserved and agree with Hartlaub's 

 description and figure. Each of the gonads forms about 

 18 — 20 folds, somewhat irregular. As the reproduction 

 of Hartlaub's drawing is not very good, I give a new 

 figure (PI. I, fig. 1). The perradial edges of the manu- 

 brium are so tightly connected with the radial canals, 

 that no actual mesenteries are present. The margin of 

 the bell is badly preserved; all the tentacles have been 

 broken off, but evidently there has been two series, about 

 32 primary tentacles alternating with an equal num- 

 ber of minute tentacles.— The animal, as preserved in 

 formalin, is colourless. 



4. Tiaranna rotunda (Quoy et Gaimard). 

 Plate I, figs. 2—4. 



Diana'a rotunda Quoy et Gaimard 1827, Annales des Sci. Nat., 

 tome 10. p. 181, pi. 6 A, figs. 1, 2. 



Tiara , Haeckel 1879, System der Medusen, p. 57. 



Maas 1910, Bull, de l'lnstit. Oceanogr Monaco, 



No. 183, p. 8. 



Tiaranna Hartlaub 1913, Nord. Plankton, XII, 1, 3, p. 266. 



Two individuals from the Mediterranean, near Gi- 

 braltar. 



Stat. 19. Lat. 36° 05' N, Long. 4° 42' W, May 2nd 

 -3rd 1910. 



a. Vertical haul 900 — 300 m. — 1 specimen. 



b. Silk-net, horizontal haul with 900 m. wire. — 1 specimen. 

 This species was described by Quoy and Gaimard 



(1827) from specimens from the Strait of Gibraltar. Accor- 

 ding to the description there is "un assez grand nombre 

 de tentacules"; the figure shows only 8 tentacles. 



The next description was given by Haeckel (1879) 

 who states, that the number of tentacles is 8, and therefore 

 refers the species to the new subgenus Tiaranna: "Tiara- 

 Species mit constant acht Tentakeln". Haeckel's descrip- 

 tion is rather deficient. According to "Diagnose" the 

 mouth-lips are "schwach gefranzt" according to the 

 "Specielle Beschreibung" they are "stark gekrauselt". The 

 mesenteries are said to be short, and the figures give 

 only a very slight idea of the appearance of the species- 



