Massy — The lloloihurioidea of the Coasts of Ireland. 43 



(between 53° and 54° 33' N. Lat.) M. Verrilli was not observed, and there 

 were only 3 takes of M. intestinaUs. 



Distribution. — Murman coast, Norway, Kattegat, Scotland and Ireland, 

 Bay of Biscay to south of Canaries. 



Vertical Range. — 164-784 fnis. 



Mesothuria VerriUi (Theel), 1885. 



.Ifesothioria Verrilli, Perrier, 1899. 



Allantis intestinaUs, Asc. & Eath., var. Fw-j-'i^Zi, Herouard, 1899. 



S.E. 336— Trawl, 673-720 fms. Four. 

 S.E. 477— Trawl, 707-710 fms. One. 

 S.E. 494— Trawl, 550-570 fms. Three. 

 S.E. 497— Trawl, 775-795 fms. Two. 

 S.E. 593— Trawl, 670-770 fms. One. 

 S.E. 944— Trawl, 982 fms. Two. 



Some of the differences between this species and M. intestinaUs, as taken 

 in our hauls, have already been noted (p. 42). 



Distribution. — Atlantic from 12" to about 50° N. lat. (Ostergren, 1902). 

 Vertical Bange.—S00-2277 fms. (Perrier, 1902). 



Mesotliuria lactea (Theel). 



KolotJmria lactea, Theel, 1885. 

 ? Ilolotliuria aspera, Bell, 1889. 

 Synallactes lactea, Herouard, 1896. 

 Mesothuria lactea, Ostergren, 1896. 

 Zygothiiria lactea, E. Perrier, 1899. 



S.E. 336— Trawl, 673-720 fms. Nine. 

 S.E. 944— Trawl, 982 fms. Twenty-seven. 



The specimens of the first haul measured 60-77 mm. 14 specimens 

 preserved from the other haul measured 45-100 mm. Like Herouard 

 (1902, p. 22), I have been unable to discover any appendages except a single 

 row on each of the latero-ventral ambulacra. The skin is, however, often 

 much wrinkled or abraded. Herouard {op. cit., p. 21) found this species in 

 great abundance in the Azores region, at soundings of 656-1093 fms. Bell's 

 brief description (1889, p. 445) of Holothioria aspera, taken in the Flying Fox 

 Exp. off S.-W. Ireland, at soundings of 1000 fms., seems to refer to a creature 

 with many points of resemblance to the present species, namely, colour, size, 

 skin, wrinkled above and smooth below, with " a single row of not closely 



