CORONATE — NAUSITHOio, LINUCHK. 557 



Found near the island oi Tristan d'Acunlia, South Atlantic, at a depth of 1,425 fathoms, 

 in an open net, on March 16, 1876. 



Nausithoe albatrossii Vanhbffen. 



Nauphanta albatrosii, Maas, 1897, Mem. Mus. Comp. Zool. at Harvard College, vol. 23, p. 83, taf. 14, fign. 1-3. 

 Nauiitho'e alhatrisii, Vanhoffen, 1902, Wissen. Ergeb. deutsch. Tiefsee Expedition, Bd. 3, Lfg. I, pp. 28, 30. 



Disk ^5 to 40 mm. wide, 55 mm. high. The marginal lappets are narrow and elongate 

 with nearly parallel sides and rounded ends; not heart-shaped, as in Maiisilho'e challengeri or 

 N. vettons ptsani f = iV. punctata). Central disk smooth and without a notched margin, such 

 as is seen in A'^. challengcri. Stomach, especially the lips, much shorter than in either N. chal- 

 lengert or N . vettons pisani. 8 gonads, elongate, oval, bladder-like organs. The gastric fila- 

 ments arise in a row in each interradius, each row being composed ot about 4 clusters, of 5 

 filaments each. All 5 filaments of each cluster arise close together, and with wide, free intervals 

 between the groups. This species is remarkable for its large size. 



Gulf of Panama, Pacific coast of Central America. 



Nausithoe rubra Vanhoffen. 



Nausithoe rubra, Vanhoffen, 1902, W'issen. Ergeb. dcutsch. Tiefsee Expedition, Bd. 3, Lfg. i, p. 30, taf. i, fign. 4, 5. — Bkif.low, 

 H. B., 1909, Mem. Museum Comp. Zool. at Harvard College, vol. 37, p. 36, plate 12, fig. 6. 



Bell 15 mm. in diameter. With large pits over the exumbrella surface of the central 

 disk. Simple gastral filaments arise separately, not in clusters. 8 large gonads. 16 short, 

 pointed, marginal lappets. 8 tentacles longer than the bell-radius. Tentacles and bell red- 

 purple, stomach blue. Indian and South Atlantic Oceans. It appears to be distinguished 

 from A'^. picta by its deep color and large pits over the exumbrella surface of the central disk; 

 moreover, according to Bigelow, 1909, the rhopalia in A^. rubra lack ocelli, while there is a 

 ventral ocellus in A'^. punctata. The septal nodes o( N. rubra are broadly triangular and the 

 4 perradial gastric ostia are narrow. The marginal canal-system is as in A', punctata. 



Nausithoe "picta" Agassiz and Mayer =N. punctata (?) 



Nauiilho'e picta, Agassiz, ,\., and Mayer, 1902, Mem. Museum Comparative Zool. at Harvard College, vol. 26, p. 154, plate 7, 

 fig. 33. — Maas, 1903, Scyphomedusen der Sihoga Expedition, Monog. 11, p. 19, taf. I, fign. 5-8. 



Bell 15 to 22 mm. wide, somewhat flatter than a hemisphere. Coronal furrow of exum- 

 brella well-developed, central disk of exumbrella smooth-edged. 16 marginal lappets, wide 

 and pointed. 8 tapering adradial tentacles, with wide bases, are somewhat shorter than 

 bell-radius. 8 marginal sense-organs, radial and interradial in position with reference to the 

 lips. 8 large, egg-shaped or oval gonads project from middle zone of subumbrella in the 

 tentacular radii. Mouth cruciform, the lips being in the radii of 4 of the marginal sense- 

 organs. 4 clusters of gastric cirri in the interradii, each cluster consisting of about 12 cirri. 



The gonads are chocolate-brown to carmine and the gastric cirri are blue. The ocelli 

 of the 8 sense-organs are dark-brown. 



This medusa was found by the Albatross in the Paumotos Islands, South Pacific, in 



September, 1899. Later, 29 specimens were found bv the Siboga in the Malay Archipelago. 



Maas, 1903, describes these specimens and fortunately corrects certain serious mistakes in the 



description written by me in the account published under the names of Agassiz and Mayer. 



I am inclined to regard this medusa as merely a large, highly-colored variety of A'aux;//!oi' 



punctata. 



Genus LINUCHE Eschscholtz, 1829. 



Linuche, Eschscholtz, 1829, Syst. der Acal., p. 91. 



Liner gei + Liniscus+ Linuche, Haeckel, 1880, Syst. der Medusen, pp. 495, 496, 498, 642. 



The type species is Linuche unguiculata Eschscholtz, 1829, of the West Indian region, 

 tropical Atlantic. 



GENERIC CHARACTERS. 



Ephyropsidae with 8 (4 perradial, 4 interradial) rhopalia. 8 adradial tentacles. 16 

 lappets. 8 gonads grouped in 4 pairs close to the 4 perradii. With zones of hernia-like sacs 

 upon the floor of the subumbrella. The 16 peripheral stomach-pouches break up into 

 branches in the lappets. A marginal ring-sinus may or may not be present. 



