STILL FOUND IN A LIVING STATE. 361 
33. Coscinodiscus radiatus, Pl. VII. fig. 1. Syn. Cose. Patina, 1838, 
ex parte. C. testule magne cellulis mediocriter amplis, in lineas 
e centro radiantes dispositis, ad marginem minoribus. 
Fossil exceedingly frequent in Oran, and also in the chalk marls 
of Caltanisetta and Zante; recent very frequent near Cuxhaven, and 
in the Baltic near Wismar. Diameter 75 — 2/5". 
34. Dictyocha aculeata, n. sp. D. cellulis senis in annulum, spinis lon- 
gioribus sex inzqualibus margine radiatum, conjunctis, calathum 
utrinque apertum referentibus, ipsisque cellulis singulis intus spinu- 
losis. 
Fossil in the chalk marls of Caltanisetta, Oran, Zante, and Greece ; 
recent near Tjorn. Diameter of the fossil =45 — gi'", of recent 
zh5 — 3s" (without the spines). 
35. Dictyocha Fibula, Pl. VIII. fig.16. Syn. Diet. Fibula, 1838. D. 
cellulis-quaternis in formam concavam rhomboidem aut quadratam 
conjunctis, angulis spinosis. 
Fossil in the chalk marls of Oran and Caltanisetta; living in the 
_ North Sea near Christiania and Tjorn, and in the Baltic near Wis- 
' mar. Diameter 5 — gy". 
36. Dictyocha (Actiniscus) Pentasterias, n. sp. D. cellulis destituta, 
centro solido concavo, radiis siliceis quinis stellam referentibus. 
Fossil in the chalk marls of Greece; recent in the port of Chris- 
tiania. Diameter ;,'". 
$7. Dictyocha (Actiniscus) Sirius, n. sp. D. cellulis destituta, centro 
solido, radiis siliceis sex acutis basi alatis, stellam emulantibus. 
North Sea, near Christiania in Norway. Diameter 9},!"’. 
$8. Dictyocha Speculum, Pl. VIII. fig. 4. Syn. Dict. Speculum, 1838. 
D. cellulis senis, in annulum, spinis longioribus sex, inequalibus, 
margine radiatum conjunctis, calathum utrinque apertum equanti- 
bus ipsisque cellulis intus inermibus. 
Fossil in the chalk marls of Caltanisetta, Oran, Zante, and Greece ; 
recent in the Baltic near Kiel, and in the North Sea near Cuxhaven, 
Christiania, and Tjorn. Diameter >4'". 
89. Dinophysis acuta, Pl. VII. fig. 14. D. lorica ovata urceolata 
granulosa, fronte quasi operculata plana, lorice posteriore fine sub- 
acuto. 
Recent in the Baltic near Kiel. Diameter ;4!". 
40. Dinophysis Michaélis (= D. limbata), Pl. VIII. fig. 15. D. lorica 
ovata urceolata granulosa, fronte quasi operculata plana latiore, 
loricze posteriore fine rotundato. 
Recent in the Baltic near Kiel. Length 2!". 
41. Eucampia Zodiacus, Pl. VIII. fig. 8. E. lorica erystallina levi 
parum latiore quam longa, ovario dilute flavo. 
Recent near Cuxhaven. Diameter of the single animalcules 5','". 
VOL, III. PART x1. 2B 
