184 I'LYMOUTH MARINE INVERTEBRATE FAUNA. 



[ Foraminifera — contd. ] 

 KOTALIA Beccarii (Linne) : Williamson, 1858, Eec, For, Gt. Br., p. 48, 



pi. iv, tigs. 90-92. 



Cawsand B. ; Drake's I. ; everywhere throughout the district 



competes with Miliolina seminuliaii and, at places, Truncatulina 



lohatula for first place in abundance. On line sands it seems best 



at home, and one dredging, about 4 m. W. of liame, in 20 fnis., 



yielded close on 12,000 individuals of this species to each 10 grms. 



of bottom deposit, while Miliolina f^rmiinihirn was present in equal 



numbers. 

 ROTALIA NITIDA, Williamson: Williamson, 1858, Eec. For. Gt. Br., p. 54, 



pi. iv, figs. 106-108. 



A common form of general distribution ; never attaining the 



occasional extreme abundance of llotalia beccarii, it none the less 



runs that species very nearly at places. 



Polystommellinae. 



XONIONINA DEPRESSULA (Walker & Jacob) : Brady, 1884, '* Challenger " 

 Keport, p. 725, pi. cix, figs. 6, 7. 



Cawsand B. ; Drake's I., and generally distributed. A common 

 species, present everywhere, and frequently in some abundance. 



NONIONINA UMBILICATULA (Montagu) : WiUiamsov, 1858, Eec. For. Gt. 

 Br., p. 32, pi. iii, figs. 68, 69 (as N. harlccana). 



Apparently prefers the deeper waters of the area examined ; 

 is nowhere a prominent species. Since, however, it also occurs in 

 estuaries, it evidently is not restricted to deeper waters only. 

 NONIONINA TURGIDA (Williamson): Williamson, 1858, Eec. For. Gt. Br., 

 p. 50, pi. iv, figs. 95-97 (as Eotalina), 



Cawsand B., and generally distributed. A small form probably 

 present everywhere, but not abundant. 



NONIONINA SCAPHA (Fichtel & Moll): Brady, 1884, "Challenger" 

 Eeport, p. 730, pi. cix, figs. 14-16. 



Occurrence similar to that of Xonionina tnnjida. 



NONIONINA STELLIGERA, d'Orbigny : Brad//, 1884, "Challenger" Eeport, 

 p. 728, pi. cix, figs. 3-5. 



Caw^sand B. ; Drake's I., generally distributed, with an apparent 

 preference for the shallower waters. Nowhere present in such 

 numbers as JSfonionina dcprcssula. 

 POLYSTOMELLA CRisPA (Linn^) : Williamson, 1858, Eec, For. Gt. Br., 

 p. 40, pi, iii, figs, 78-80, 



Cawsand B, ; Drake's I,, and generally distributed within the 

 15 fni. line ; outside the 20 fm. line this form is practically 

 unknown; never abundant outside 10 fms., but within that limit 

 sometimes the dominant species. The Zostera of Cawsand B. is at 

 times crowded with this species, 

 POLYSTOMELLA SUBNUDOSA (Mllnster) : Brady, 1884, "Challenger" 

 Eeport, p. 734, pi. ex, fig. 1. 

 Not infrequent outside 28 fms. 

 POLYSTOMELLA MACELLA (Fichtel & Moll) : Brady, 1884, "Challenger" 

 Eeport, p, 737, pi. ex, figs. 8, 9, 11. 



Drake's I., and probably wherever Polystom el I a crisj)a Cornishes. 



