ANNELIDA. 
103 
Sars, which often distends the stomachs of large cod, to the 
smaller Nereis pelagica and N. cultrifera ) are universally 
eaten. The somewhat uninviting Trophonia plumosa some¬ 
times forms the sole food in the stomachs of large haddocks, 
many hundreds occurring in a single fish. Owenia filiformis , 
with its gravelly tubes, is a favourite diet of the same fish, 
and of cod and flounders. The Terebellidas and their sandy 
tubes are also largely devoured; and even Serpulidee are not 
passed by. Moreover, in their young or larval forms they 
constitute an important element in the food of the herring and 
other fishes that feed near the surface of the water. 
Many of the annelids of St. Andrews are common to the 
whole British area; but some have not yet been found in other 
parts of our seas : as this, however, is probably due to a larger 
amount of attention having been directed to the locality, we 
shall not at present particularize. 
The fauna at St. Andrews is distinguished, as far as our 
present knowledge extends, from the Zetlandic by the absence 
of such striking forms as Lcetmonice , Panthalis , Nothria 
conchylega , Terebella nebulosa , Pista cristata , Trichobranchus 
glacialis , and Ditrypa arietina ; from that of the western 
regions by the absence of Spinther , Lepidonotus clava , Poly¬ 
noe scolopendrina , Ophiodromus vittatus , Gattiola spectabilis , 
Terebella nebulosa , and Pista cristata ; and of the southern 
types we miss Euphrosyne , Hermione , Polynoe areolata , Nereis 
Marionii , Lysidice ninetta , the Eunicidse, the abundance 
of the Chastopteridae, Sabellaria alveolata , Leprcea textrix , 
Sabella saxicava , Protula , and Filigrana between tide-marks. 
The great preponderance of Polynoe floccosa in the south is 
also an interesting feature. 
Amongst the annelids that, besides other very common 
forms, abound at St. Andrews, and therefore most characteristic 
of it, are Sigalion MatJiildce , Sthenelais limicola, Pkyllodoce 
laminosa , P. groenlandica , Nereis cidtrifera,Alittavirens, Auto- 
lytus pictuSj Aricia Cuvieri , Ophelia limacina , Trophonia plu- 
mosa , Nenne fohosa , Polydora ciliata , Capitella capitata , 
Sabellaria spinulosa , Pectinaria belgica , Lanice conchilega , 
Sabella pavonia , and Branchiomma vesiculosum. 
Some of the phosphorescent forms at St. Andrews have 
