44 Scientific Proceedings, Royal Dublin Society. 



packed podia " on each side, and, lastly, the spicula fig-ured are very like the 

 beautiful wide-meshed disks oi' M. lactea, if the deposits examined had the 

 outer rings of the tables broken away or not developed. Amongst the 

 specimens of K. lactea from station S.R. 944 a portion of the perisome 

 exhibits disks of this description with only 6 spokes and a central hole; and 

 none of the table spires appears in this particular part, although abundant 

 in the remaining portion of the mount. I have had no opportunity of 

 examining the type of H. asp&ra which is preserved in the British 

 Museum. 



Distribution. — North Atlantic, from Bay of Biscay to Azores (Koehler, 

 1896, and Herouard, 1902). Pacific (Theel, 1885). Indian Archipelago 

 (Sluiter, 1901). 



Vertical Range.— 498 -12Zb fms. (Sluiter, 1901, and Perrier, 1902). 



Family ELASIPODIDAE. 



Laetmogone violacea, Theel, 1879. 



Cryodora spongiosa, Theel, 1882. 

 Laetmogone spongiosct, Theel, 1882. 



„ Jourdaini, Petit, 1885. 



„ Brongniarti, E. Perrier, 1886. 



About 2000 examples of this species are recorded in the log-books. They 

 occurred in 36 hauls at soundings of 250-778 fms., and in the lat. 50° 21' 

 to 52° N., and between 11° and 12° 54' W. long. Of the 2 previous Irish 

 records, that of the Flying Falcon (Sladen, 1891) was withinthese limits, 

 but the Hdga station was much further north at 53° 58' N., 12° 26' W. 

 (Kemp, 1905). Examples from 3 stations (S.E. 327, 333, and 336) were 

 preserved, and measured 12-140 mm. The hauls extended over a period 

 of 9 years, and young ones were noted in 4 May and 10 August-September 

 hauls. From year to year, in winter and summer hauls, it was 

 observed in abundance only at various points at about the 500-fathom 

 line. As the specimens which were not preserved were not microscopically 

 examined, it is possible that some of them may have been referable to 

 Zaetmot/one Wycille-Thomsoni, Theel, which was taken by the Oaudan 

 Expedition in the Bay of Biscay in 6 hauls, and which Koehler (1896, p. 118) 

 considers to be one of the commonest Elasipods in the North Atlantic. 



Distribution. — Faroe Channel, Bay of Biscay to Senegal and Azores, 

 Maldives, Andamans, Moluccas, Japan, off Sydney. The greatest depth 

 recorded seems to be that of the Challenger Exp. at 950 fms. 



