159 311 
961. §. recedens A.S. A.S. Atl. tab. XIX, fig. 3. 
KKm, KKt KCn, KMn, s.1. (7 samples). 
Area: Brazil. 
262. S. reniformis Grun. Perag. Diat. de Fr. tab. LXV, fig. 5. 
KKt, s.1. (3 samples)- 
Area: Honduras, Languedoc, Banyuls, Madagascar, San Thome, Malay 
Archipelago, Samoa. 
This form, taken by Peragallo (l.c. p. 255) as a separate species, 
is identical with Grunow’s Plagiodiscus nervatus. It is very near to 
Sur. Gemma and like V.Heurck (Traité p. 374) 1 am most inclined to 
regard it as an abnormous form of S. Gemma only differing in its outer 
appearance. 
In a sample from TK I found a Surirella, identical with a ,fragliche 
Form‘ from the Gazelle-Expedition enfr. A.S. Atl. tab. LVI, fig.6 and Jan 
Gaz. Exp. tab. XXI, fig. 23. 
Campylodiscus Ehb. 
Rhaphidee Deby. 
263. €. biangulatus Grev. A.S. Atl. tab. CCVII, fig. 15 & tab. XVIII, 
fig. 4 (C. Lorenzianus Gr.) 
KKt, KCn (2 samples). 
Area: Adriatic, Red Sea, Sumbava, Java, Manilla, Australia. 
264. €. birostratus Deby? A.S. Atl. tab. XIV, fig. 23. 
Solitary in a sample without habitat. 
Area: Campeachy Bay. 
Of this species I have only seen one specimen, somewhat smaller 
than the figure by A.S. and with somewhat more distant rays. 
965. €. crebrecostatus Grev. = €. Heufleri Grun. A.S. Atl. tab. XIV, 
fig. 26. 
Solitary in a sample without habitat. 
Area: Porto Seguro, Red Sea, Madagascar, Malay Archipelago, Sansego, 
Samoa, Sandwich Islands, Philippines, Port Jackson. 
266. @. Grevillei Leud. Fortm. Leud. Fortm. Ceyl. tab. V, figs.54—56. 
KKm, KKt, KMn—CLt s.1. (12 samples). 
Area: Madagascar, Ceylon, Sandwich Islands. 
267. €. Ralfsii W.Sm. A.S. Atl. tab. XIV, fig. 2. 
KKm, KKt (2 samples). 
Area: Europe, India. 
