Woods : Marine Biology at Robin Hood's Bay 



369 



writes : — ' Absence of distinctive rock-pools and cavernous 

 ledges, as well as a minimum of mud and sand militates against 

 Robin Hood's Bay as an ideal spot for marine organisms in 

 general. Nevertheless, at low Spring-tide, such as we ex- 

 perienced, with a calm sea, the semi-tide pools lying between 

 the liassic reefs running out at right angles from the shore are 

 full of possibilities, and provifled practically all the non- 

 conchological specimens in this list. Although there is no new 

 species to record this year, as far as my investigations went, 

 the variety of organisms found in the hour or two was consider- 

 able. The Botryllus patches weie fine and Echinoderms 

 plentiful — indications that the neighbourhood is good for 

 marine work. A single morning's hunt is hardly sufficient to 

 form a sound judgment of what may or may not be found 

 there.' 



The following list was drawn up by Dr. Irving and myself, 

 I claim responsibility for the shell-molluscs, D^. Irving for the 

 rest : — 



PoRiFERA (Sponges). 



Halichondria panicea. 



Gvantia compressa. 



Leucosolenia botryoides. 



Leuconia nivea. 

 Hydrozoa (Zoophytes). 



Sertulavia pumila. 



Obelia geniciilata. 



Clava niitlticornis. 

 AcTiNozoA (Anemones). 



Actinia mesembryanthemuni. 



Tealia crassicorhis. 



Sagavtia troglodytes. 



Sagania pitra. 

 Vermes (Worms). 



Linens mannus. 



Nemevtes neesii. 



Nereis ciiltrifera. 



Nereis pelagica. 



Lepidonotus squamatus. 



Havniotho'e imbricaia. 



A udoiiinia tentaculata. 



Cirratiilus cirratus. 



Potamilla torelli. 



Snbellaria spimdosa. 



Pomatoceros triqueter. 

 MoLLUscA (Shelled). 

 *Tonicella rubra. 



* Callochiton Icsvis. 



* Craspedochilus onyx (asellus). 



* ,, cinereus {marginattts) . 



* Acanthochitcs fasciciilaris. 

 Niicula nucleus. 



nitida. 



Nuculana mimita (candata). 

 *f Anomia ephippium. 

 ,, patelliforniis. 

 *Mytilus edulis. 



* Vnlsella modiolus. 

 ^Modiolaria marmoratc. 



t „ discrepans {nigra). 



Ostrea edidis. 



Pecten pusio. 

 f ,, varius. 

 f ,, opercularis. 

 i ,, tigeriniis {iragraent). 

 t ,, similis (imperfect). 



* Tiirtonia mimda. 

 A starts compressa. 



Montaciita bidentata. 

 Tellimya ferruginosu. 



* Keilia suborbicularis. 

 ^ Laseea rubra. 

 ^Syndosmya nitida. 



,, alba. 



Tellina tenuis (fragment only), 

 f ,, fabvJa. 



Donax vittatus (fragment only). 

 ^Mactra stultorum. 

 \Shisula solida. 

 f Venus galliua. 



* Tapes pullastra. 



* ,, V. pevforans. 

 t Cardium echinatum. 

 t „ fasciatum. 



f ,, editle. 

 *Mya truncata. 

 *Saxicava rugosa 



Note. — An asterisk (*) prefixed to a name sig^nifies that the animal was 

 found alive ; a dag'ger (f) tliat it was only found in a very young- state. 



1912 Dec I. 



