1888-89.] Mr John Rattray on the Genus Coscinodiscus. 585 
round punctiform granules placed irregularly amongst the larger ; 
rows inconspicuous, most crowded, and submoniliform near the 
border ; interspaces narrow, hyaline. Border with inner edge 
indistinct ; striae, 4 to 6 in *01 mm., evident. 
Distinguished from C. elegans by the more irregular markings, 
narrower interspaces, and less evident radial rows. 
Habitat. — Jeremie deposit, Hayti (Weissflog !). 
C. elegans. Grev., Trans. Micr. Soc. Lond ., 1866, p. 3, pi. i. 
fig. 6. — Diam. -045 to *08 mm. Central space irregularly round, 
about j-’j of diam. broad. Markings round, 4 to 4J in *01 mm. ; 
subequal to the narrow band at the border ; upon this band 
minute granular interspaces, hyaline, large opposite the origin of 
the shorter rows ; rows upon the band at border crowded ; apiculi 
minute, widely placed, sometimes absent. Border strise obvious, 
6 to 8 in ‘01 mm. — Sch., AtL, pi. lviii. fig. 7 ; Pant., Fossil. 
Bacil. Ung ., p. 73, pi. xvi. fig. 141; pi. xxiv. fig. 216; Janisch, 
Gazelle Exped ., taf. iv. fig. 6; Cleve and Moll. Diat ., No. 164; 
C. margaritaceus , Cstr., Diat. Chall. Exped ., p. 164, pi. xviii. fig. 
3. In H. L. Smith, Diat. Spec. Typ., No. 99. 
Not to be united to C. gemmifer , as suggested by Pantocsek. 
Habitat . — Monterey deposit (Hardman ! Greville ! Firth ! 
Kinker !) ; Bajtha, Elesd, Kekko, Szent Peter and Dolje deposits 
(Pantocsek) ; Piscataway (Weissflog !) ; Los Angelos (O’Meara ! 
Hardman !) ; * Sta Monica deposit (Cleve and Moller ! Cleve ! 
Firth !) ; Springfield, Barbados (Doeg !) ; Japan (H. L. Smith !) ; 
Newcastle deposit, Barbados (Doeg !) ; S. California, Pacific coast 
(Cleve). 
Yar. parvipundata. Tru. and Witt, Jeremie Diat., p. 14, pi. ii. 
fig. 22. — Diam. -08 mm. Markings more minute ; towards the 
centre 6, towards the border 8, in '01 mm. ; rows radial, more 
numerous ; interspaces less evident, small. 
Habitat . — Jeremie deposit (Truan and Witt). 
C. spiniferus, Grove and Sturt. Grun., in Bot. Centralbl., Bd. 
xxxiv. Nos. 2, 3, 1888, p. 35. — Diam. *0875 to '1125 mm. Surface 
* In the collection of Julien Deby. 
