8 



JAMES A. GRIEG 



|REP. OF THE "MICHAEL SARS" NORTH 



to those of the dorsal surface, but the saddle-formed ones 

 (figs. 3 d, e) predominate there, while the cruciform 

 deposits are more scarce. More or less spiny crosses 

 (fig. 3 f) are frequent in the ambulacral papillae. In 

 other respects the same forms of deposits are found as in the 

 body. The rod-shaped spicules (fig. 3 g) are characteristic 

 of the tentacles. They may be more or less spiny and 

 more or less curved. Figs. 3 h, i represent forms which 

 are likewise frequently found in the tentacles. There are 

 besides the same forms as occur in the body. 



The colour of the disc of mouth and tentacles is 

 dark bluish-violet, the rest of the animal, plain grayish 

 rusty-brown. 



The specimen, kept in alcohol, is not very well 

 preserved, as it has become rather contracted and a tip 

 of the right lateral process is torn off. Also some of the 

 tentacles and lateral ambulacral papillae are wanting. 

 The forms of the animal given by me (pi. 1, figs. 4—6) 

 are therefore in part reconstructed. 



At a first glance the specimen reminds one of Peri- 

 am ma rosea described by Perrier 1 ) in his monograph on 

 the holothurians of the "Travailleur" and "Talisman". 

 The calcareous deposits show, however, that it does not 

 belong to this species, nor even to the genus Periamma, 

 but that it is a Peniagone — I recognize the genera of 

 Elpidiidae, adopted in the classification given by Perrier 

 in the monograph mentioned 2 ). Perrier recognizes 

 12 species of Peniagone, four of them from the Atlantic, 

 three from the Indian Ocean, four from the Pacific, and 

 one from the Antarctic. Koehler and Vaney 3 ) added three 

 species from the Indian Ocean to this number 4 ). The 

 specimen herein described differs from all of the species 

 cited, by its external form as well as by the structure of 

 the deposits. It must therefore constitute a new species 

 which I call Peniagone ferruginea on account of the 

 rusty-brown colour of the specimen. 



Peniagone azorica v. Marenzeller. 



Peniagone azorica v. Marenzeller, Holothuries, Res. Camp. Sci. 

 Monaco, Fasc. 6, 1893, p. 12, tab. 1, fig. 4, tab. 2, tig. 5. 



18 /t. Stat. 88, 45° 26' N, 25° 45' W, 3120 m., sand and yellow 

 mud. One specimen. 



The specimen measured 78 mm. in length, 22 mm. 

 in breadth. It was therefore considerably larger than v. 

 Marenzeller's type-specimen which measured 50 and 



1) Op. cit., p. 419, tab. 13 fig. 10—12, tab. 20 fig. 1 — 11. 



2 ) Op. cit., p. 405. 



3 ) Koehler and Vaney : Investigator Deep-See Holothurioidea, 1905. 



4 ) The two species, P. ecalcarea and P. discrepans, described 

 by Sluiter in „Die Holothurien der Siboga Expedition" evidently do 

 not belong to the genus Peniagone, I have therefore paid no regard 

 to them. 



13 mm., respectively. The dorsal processes were 19 mm. 

 in length, 8 mm. broad at the base. It had, like v. 

 Marenzeller's specimen, 21 ambulacral papillae, 9 of which 

 were placed along either side of the body, and 3 at the 

 anus. The largest were 8 mm. in lenght. The disc of 

 the tentacles was 4 mm. wide. 



I may add to the description which v. Marenzeller 

 and Herouard 1 ) give of the deposits of this species, that 

 they were numerous, not only in the body but also in 

 the tentacles, where they existed chiefly as straight or 

 curved rods of different sizes. Sometimes the rods were 

 branched. Irregularly branched and cruciform deposits, 

 some of them similar to those on the ventral surface, 

 occurred also, though sparingly (fig. 4). 



Fig. 4. 



Calcareous deposits from the tentacles of Peniagone azorica Marenz. 



Peniagone azorica was previously found only off the 

 Azores by the "Hirondelle" and "Princesse Alice". Accor- 

 ding to the explorations of the "Michael Sars" its horizontal 

 distribution will be from 38° 8' to 45° 26' N. Bathy- 

 metrical range, 2870 to 4020 m. 



Euphronides auriculata R. Perrier. 



Euphronides auriculata R. Perrier, Comptes Rendus de l'Acad. 

 Sci., tome 123, 1896, p. 902. 



Vs. Stat. 25 A, 35° 36' N, 8 25' W, 2300 m., yellow mud. 

 Two specimens. 



The best preserved specimen was 70 mm. long and 

 13 mm. broad. 



!) Op. cit., p. 42, tab. 6, figs. 21—25. 



