a gt : 
indes 
a, ee 
paullo intra cornu utrumque aculeis binis instructe; a latere 
vise fere hexagono-orbiculares, utrimque paullum tumid, 
dorso aculeis 4 (tantum 2 visibilibus) ornate. Latitudo 
rau quadrans longitudinis corporis (s. acul.). Membrana 
glabra, 
Long. s. acul. 0,00165” = 42 u; a. acul. 0,002“ = 51 
u; Lat. s. corn. 0,00087— 94 —= 22—24 u; c. corn. 0,0022 
— 32" — 56—82 u; Long. corn. usque 0,00118% == 30 u; 
Long. acul. dorsal. 0,0003” = 7,7 u; Lat. isthmi 0,00037 
—43' — 9,5—11 u; Crass. 0,00094 —= 24 u. 
S. Cerastes nov. sp. | 
S. submagnum, paullo latius quam longius; semicellul® 
(introrsum) lunatz, sed in media parte introrsum subconico- 
ventricos®, utrimque in cornu robustum, non longissimum, 
ineurvum, apicem subobtusum versus attenuatum, margine 
exteriore (convexo) verrucis numerosis, emarginato-bifidis, 
sed apicem cornus versus integris et papilleformibus dense 
obsitum, margine interiore (concavo) nudum, angustato-pro- 
ductz, ad basin utrimque papilla instructe; a vertice vis® 
tri-quadrangulares, angulis in cornu validum, strietum, e basi 
lata apicem tridentatum versus valde attenuatum , re 
margine et intra marginem verrucis emarginato-bifidis, api- 
cem cornuum versus integris, papilliformibus et densissimis 
ornat. 
Long. 0,00205 217 = 52—55 u; Lat. ce. corn. 0,00248 
— 184" —63—72 u; Lat. isthmi 0,00039 - 47" —=10—12 u. 
S. Ophiura nov. sp. 
g permagnum, medio utrimque leviter emarginatum ; 
semicellule fere obovat®, sursum sensim dilatate, in apice 
convexo papillis bifidis ornat®e, angulis inferioribus papilla 
instructis, superioribus in radium valde elongatum, gracile, 
subachroum, strietum vel leviter incurvum, margine subtiliter 
denticulatum, apice uni-bidentatum productis; semicellule a 
vertice vis® 7-(raro 6- vel 8-) radiats, radiis prelongis, api- 
cem tridentatum versus sensim sensimque attenuatis, mar- 
gine serrato-dentatis, in centro coronula papillarum 7 (raro 
6 vel 8) quadrifidarum ornate. 
Long. 0,00256—323” — 65—82 u; Lat. exelus. rad. 
0,00134 — 157° —= 34— 40 u; inclus. rad. 0,0055 — 61” — 
140—155 u; Maxima long. rad. 0,0025“ 63 u; Lat. isthmi 
0,00087 —= 22 u. 
S. mutilatum nov. sp. 
S. mediocre, diametro cireiter tertia parte longius, non 
profunde constrietum sinu obtusangulo; semicellule subhexa- 
gonse, e basi admodum lata ad medium dilatate, dorso trun- 
