420 ON THE FAUNA AND BOTTOM-DEPOSITS NEAR THE 30-FM. LINE 



should bring out clearly the fact that line saud species are more 

 abundant on Ground XI. than on the typical Gravel Ground IX. 



Burrovjing species. Ehalia tumcfacta and Ehalia tuherosa are 

 decidedly less numerous in XI. than in IX. Atekcyclus hetcrodon, of 

 which small specimens are numerous in IX., is not abundant in XI. 

 Gardium norvegicum, which was represented by one specimen in IX,, 

 was not taken in XI. Dentalmm entalis, which was absent in IX., was 

 present in one haul (47) in XI. 



Fixed species. The only species common on the typical Coarse Gravel 

 IX., which is scarce in XI., is Folyccwpct varians, of which one or two 

 specimens were taken in haul 47 only. On the other hand : — 



Seriularella Gayi is much more common on XI. than it is on IX. 



Antcnmdaria antennina. Common on XI., is scarce on IX. 

 ,, ramosa. „ XI. „ IX. 



AglaoiJhenia myrioijhyllum. Occasionally taken on XL, is absent on 

 IX. 



Ascidiella scahra is more common on XI. than it is on IX. 



Cellaria sinuosa ) , vt ^.i tv 



_, „ , ^ [-are much more common on XI. than on IX. 



Cellaria fistulosa ) 



Proneomenia aglaophcniae was found on XL, clinging to the stalk of 

 Aglaophenia myrio2)hyllum. 



Wandering species. Pccten opercidaris and Pecten maximus, which are 

 common on the typical Gravel Ground IX., are scarce or absent on XL, 

 and with them Asterias ruhens and A. glacialis become scarce. The 

 following species also, which are common on IX., are scarce or absent 

 on XI. : — Ojjhiura albida, Eupagurus Bcrnliardus, Eiipagurus Prideauxii, 

 Anapagurus laevis, and Turritella communis. 



List of Species. Gkound XL 



Hydrozoa. 



Eudeudrium sp. Small species, not 

 capillare. 



liouyainvillia ramosa. One piece in 84 

 only. 



Clytia Johustoui. Plentiful on hydroids 

 and shells. 



Lafoea dumosa. Creeping form only. 



,, I'rutieosa. Pliiiilirul in 84 only. 



Halecium halecinum. Pkntirul, growing 

 on ChiuUiptcrus tubes 

 and on shells, esi)ccially 

 Pecten maximus shells. 



„ Beauii, Plentiful, growing on 

 C'hactoplerus tubes and 

 on shells, esi)ecially 

 Feden maximus shells. 



Sertulai-ella Gayi. Plentiful, attached to 

 pol3'eliaete tubes (es- 

 pecially Chactopkrus), 

 or less frequently to 

 shells. Not so conmion 

 as Halecium. 



Sertularella polyzonias. Less common 

 than S. Gayi. 



Antennularia antennina. Common, lixed 

 in till' sand by felt-work 

 of libres, or attached to 

 Chaetojttcrus tubes. 



„ ramosa. Less common than 



A.antcnniiui. Often fixed 

 to Ckc(cto2)terus tubes. 



Aglaophenia myriophyllum. Generally 

 abundant, fixed in the 

 .sand by felt-w'ork of 

 libres. 



