1888-89.] Mr John Rattray on the Genus Coscinodiscus. 475 
between the radial rows. It is not strictly defined by the 
authors. 
Habitat. — Yokohama (Schmidt), Cambodia (Hardman !) * Mejil- 
lones (Hardman ) ;* Los Angelos (O’Meara !) ; marine deposit, Fiji 
Islands (Grove !) ; rice fields, Georgia (Greville !) ; Zebu, Philippine 
Islands (Weissflog !) ; Jeremie deposit, Hayti (Truan and Witt) ; 
Indian Ocean, sounding by Capt. Pullen, 2200 fathoms (Greville !); 
Balearic Islands (Cleve and Moller !). 
C. jpseudo-lineatus. Pant., Fossil. Bacil. Ung ., p. 73, pi. ix. fig. 77. 
• — Diam. ’08 to ‘125 mm. Centre occupied by a siugle circular areola, 
*0025 mm. broad. Markings hexagonal, 8 to 9 in *01 mm., decreas- 
ing somewhat outwards ; within the border a narrow punctate hand, 
somewhat irregular on its inner side. Apiculi minute, numerous, 
forming a circlet at the border, one larger inserted somewhat further 
inwards. Border striae, delicate, 12 in *01 mm., merging into the 
adjacent band on the inner side. 
Habitat.— Dolje deposit (Pantocsek !). 
C. cristatus , sp. n. — sp. n. ? Sch., Atl., pi. lix. fig. 4. — Diam. 
*0305 mm. Central space and rosette absent. Markings regularly 
angular, 10 in *01 mm., a narrow hyaline hand adjacant to the 
border; apiculi numerous, their outer ends obtuse, placed at the 
inner edge of the hyaline hand. Border distinct, hyaline. 
Habitat. — Peruvian guano (Schmidt). 
Yar. distans. (?) Sch., Atl., pi. lix. fig. 5. — Diam. ’02 mm. 
Markings 10 to 12 in *01 mm., secondary oblique rows distinctly 
curved outwards ; no hyaline band adjacent to border ; apiculi 
similar, hut more distant. 
Habitat . — Kings Mill (Schmidt). 
C. tumidus , Janisch. Sch., Atl., pi. lix. figs. 38, 39. — Diam. *164 
to *2 mm. Surface convex towards the centre. Central space 
absent. Markings hexagonal, towards the centre 4 to 4J in - 01 mm., 
increasing outwards to the border to 3 in *01 mm.; oblique de- 
cussating rows, straight, or with slight bendings. Border striae, 
4 in *01 mm. — Cleve and Moll., Diat., Nos. 125, 207. 
Habitat . — Table Bay (Schmidt, Weissflog !) ; surface, Antarctic 
* In the collection of Julien Deby. 
