100 BRANCHIOPODA. 



Subclass III. EXTOMOSTRACA. 

 Order IX. BRANCHIOPODA. 

 Suborder I. Phyllocarida. 



Fain. N E B A L 1 1 D .E. 



NEB ALIA BIPES (Fabricius). 



1888. Nebalia Geoffroyi, Glaus (C.), Organismus der Nebaliden und 

 die systematische Stellung der Leptostraken, pp. 1-148, pis. i.-xv. 



1896. Nebalia bipes, G. O. Sars, Fauna Norvegiae : I. Phyllocarida og 

 Phyllopoda, p. 9, pi. i. tigs. 1-3, pis. ii. & iil,pl. iv. tigs. 1-8, pi. v. 



This species is also Nebalia Herbstii o Leach and Nebalia 

 Montagui o J. V. Thompson. It is common on the south 

 side of Devon and Cornwall, and no doubt, if looked for, 

 would be found also on the northern coasts. 



Suborder II. Phyllopoda. 



Fam. BRANCHIPODID^E. 

 CHIROCEPHALUS DIAPHANUH, Prevost. 



1850. Chirocephalus diaphcmus, Baird, Nat. Hist. Brit. Entomostraca, 

 p. 53, pis. iii.-v. 



This species would appear to be far more abundant in 

 Cornwall than elsewhere in the British Isles. Mr. Rupert 

 Vallentin wrote to us, Feb. 4, 1905, as follows : " Chiro- 

 cephalus diaphanush&s been found at Penryn, near Falmouth 

 (Hoy. Cornwall Polytech. Soc. Ann. Rep. 1891, 'Additions 

 to the Fauna of Falmouth/ by R. Vallentin), also in several 

 ponds in Newquay. A young friend of mine, now dead, 

 found the species very abundant in several roadside ponds 

 round Tintagel, and brought some specimens back for my 

 inspection. Mr. W. Garstang told me that ' a gentleman 

 many years ago secured some specimens of Chirocephalus in 

 a roadside pond near Grampound Road/ Doubtless this 

 species is to be found in many ponds and pools throughout 

 this county. It is simply a question of looking for it at the 

 right time of year, January to March/' But though Chiro- 

 cephalus is more abundant in the spring, it will reappear also 

 in the autumn ; for on Sept. 26, 1905, Mr. Vallentin found 

 the Chirocephalus in a roadside pond between Guinear Road 

 Station and Helston, and kindly sent us two female specimens, 

 which exceeded in size any which we had previously seen. 



