232 FAUNISTIC NOTES AT PLYMOUTH DURING 1893-4. 
Coelenterates make their appearance. The ephyre of Awrelia lead 
the way, and become increasingly abundant. Rathkea octopunctata 
represents the Anthomeduse ; and a medusa that appears to be the 
Phialidium variabile of Haeckel ushers in the Leptomeduse. 
Minute Obelia medusze become noticeable as the month progresses. 
Occasionally the Channel tide introduces the ova and larve of 
Ctenophores and errant specimens of the Siphonophore Muggizxa 
atlantica, 
The Polyzoan larvee Cyphonautes and the larvee of Lamellibranchs 
are common ; and the pelagic post-larval stage of Arenicola, in its 
oelatinous tube, may from time to time recur, 
Echinoderm larve, especially Auricularia, are usually abundant 
during a portion of the month. 
The Appendicularian Oikoplewra divica is often plentiful. 
March.—Halosphera is plentiful this month, and Rhizoselenia 
and Chetoceros often become extremely abundant. 
At the end of the month the gelatinous alga Tetraspora of 
Pouchet makes its appearance, first in the Channel and soon after- 
wards in the harbour. 
Shoals of ephyree of Awrelia may be taken in the first fortnight, 
showing a distinct increase in size since their first appearance ; but 
towards the end of the month, during their metamorphosis into the 
medusa form, they begin to disappear and are difficult to discover. 
Rathkea octopunctata is plentiful. The Anthomeduse Sarsia 
prolifera (and tubulosa?) and Podocoryne (Dysmorphosa) carnea 
make their appearance ; and the earlier phases of the Leptomedusee 
Clytia Johustont and Irene pellucida (Claus, non Haeckel) are to be 
obtained, together with numbers of small Obelia and a few Thau- 
mantias. 
The Cereanthid larva Arachnactis appears, and is plentiful towards 
the end of the month. 
Minute Planarians are sometimes noticeable. 
The later stages of Phyllodoce larvee are plentiful; the larve of 
Polydora also occur. 
Crustacean larvee of all kinds abound, and the Zoxwx of Porcellana 
begin to appear. 
The Cladocera Podon and, more scantily, Hvadne arrive. Echino- 
derm larvee (Awricularia, Bipinnaria, Pluteus) occur at times. 
A striking feature of March tow-nettings is the profusion of the 
Appendicularian Orkopleura dioica, which is now breeding; its 
gelatinous houses (a mysterious scum to the unwary) are often a 
ereat nuisance, but a greater is to follow. 
April—Tetraspora abounds, discolouring the sea and choking the 
meshes of the nets in two or three minutes. ‘Towards the end of the 
