234 FAUNISTIC NOTES AT PLYMOUTH DURING 1893-4. 
The Gastropod larva Echinospira diaphana always occurs. 
The Cladoceran Podon is generally abundant, but Hvadne is 
generally still in mid-Channel. Sacculina Nauwplii are plentiful. 
Minute Otkopleure of the same year’s brood are frequently 
abundant. After an exceptionally warm, calm spring the harbour 
may be invaded by hordes of Salps (Thalia democratica-mucronata). 
July—A transition is gradually effected during July between the 
distinctively summer and autumn faunas. 
Rhizoselenia and Dinoflagellates (Ceratiwm, Peridiniwm) are 
common. 
The Anthomedusze are represented by numbers of Podocoryne 
carnea with some Sarsia eximia ; the Leptomeduse by numbers of 
Laodice cruciata, Obelia, and (in the Channel) of Saphenia mirabilis. 
The Siphonophore Muggixa atlantica, which occurs during the 
earlier part of the year only in scanty numbers, becomes plentiful 
towards the end of this month. 
The first specimens of Chetopterus larvee may be taken. 
Balanid Nawplii become again numerous, and Hvadne arrives in 
large numbers. 
Kchinoid Plutet are to be obtained. 
August.—In variety and intrinsic interest of the forms to be 
captured, this and the next month are perhaps the richest in the 
year,—a feature which accords well with the fact that during this 
month the sea temperature attains its maximum for the year. 
The more oceanic element includes numbers of Radiolaria, 
Muggixa, young Geryonia appendiculata, Hvadne (and perhaps 
Podon), and Doliolum Tritonis,—all of which, after a warm summer, 
may occur in plenty and even profusion. 
Numbers of interesting larval forms are also taken, of which the 
chief perhaps are Miiller’s larva (in shoals towards the end of the 
month), Pilidiwm (abundantly), Annelid larvee (Polygordius occa- 
sionally, Polydora, Pectinaria, Nerine, Magelona, Chextopterus), 
Gastropod larve (Rissoa, Afgirus, Cirropteron semilunare), Actino- 
trocha, Cirrhipede larvee (Sacculina), Hchinoderm larve (Plutet, 
large Bipinnarix), Tornaria, and the larva of Amphiozus. 
Conspicuous among Anthomeduse are Amphinema Titania and 
Podocoryne (Dysmorphosa) ; and among Leptomeduse, Saphenia 
mirabilis, Laodice cruciata, and small Obeliz. 
Dinoflagellates and diatoms (Rhizoselenia) are plentiful. 
September.—The floating fauna during September differs very 
shghtly from that of the preceding month. 
The disappearance of the medusee Laodice cructata and Saphenia 
mirabilis is effected, and Willia stellata appears. 
Almost all the other forms plentiful in August retain their abund- 
