KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 



25. n:o 5. 101 



sub-lineari, modice aperto: raembrana glabra, vel obscure punetata. A vertice visum 

 angusto-ellipticum. 



Long. 70, lat. 74. lat. isth. 12, 1. spin. 10—18 /u. T. XII, f. 32, after Wallich 

 Mscr No. 174. 



Speciei prsecedenti proxime accedit. 



8. X. hexacanthiiiii, n, sp. X. loediocre, fere tam longum quam latum; semicellulae late 

 octagonae, angulis externis spinis rectis singulis longis 6 armatis; ventre tumidae, con- 

 gerie circulari verrucarum ornato; membrana punetata; sinu profundo, sublineari, ex- 

 trorsum valde ampliato. 



Long. 77, lat. 72, lat. isth. 13, long. spin. 9 — 13 /u. T. XII, f. 26. 

 Xear to A. Nordstqdtianum Reinnch, and to the preceding speeies. 



9. X. tetracaiitluim, n. sp. X. submediocre, tam longum quam latum; seinicellulae irre- 

 gulariter quadrangulares, basali parte laterum infläta; membrana glabra, ventre tumida, 

 annulo granolorum ornata ; sinu acuto, aperto, interne rotundato. Quaquee semicellula 

 angulis externis spinis 4 rectis vel leniter curvatis singulatim positis armata. 



Long. 67, lat. 68, lat. isth. 13, long. spin. 7.5 u. T. XJI, f. 29. 



Arguing from ånalogy with such a form as this, undoubtedly a Xanthidium, 

 would prevent the well known form (though absent from these gatherings) X. octocorne 

 Ehr., from being often misplaced under Arthrodesmus ! 



10. X. ineptum, n. sp, X. minutum, tam longum quam latum (sp. inclus.); semieelluhe 

 ovales, margine rötundatae, dorso paullö depressas; lateribus (quibusque) spinulis 3 ar- 

 matis, irregnla riter positis; sinu brevi, aperto; membrana glabra? A latere visum bi- 

 ovatum, lateribus non tumoribus inunitum. 



Long. 11 — 12, lat. c. spin. 11 — 13, lat. isth. 3 — 3.5, crass. 4 — 4.5, 1. spin. 1.5 

 —2 ,«. T. XII, f. 21, after Wallich Mscr. No. 286. 



11. X. Searsolense, n. sp. X. parvuin, Cosmariiforme, quinta parte longius quam latum, 

 late ovale: semicellula' sub-semieirculares, dorso truncata?; quaque semicellula in c<n- 

 trum nodulis parvis \ crticaliter positis prsedita; et apud apices processubus duobus (4 

 a latere et a vert. visis) emarginatis munita; margine aculeis parvis, utroque latere 

 6 — 7, armata; membrana glabra; sinu lineari, angusto, extrorsum parum ampliato. 

 A' latere visum clepsydriforme, apicibus truncatis; aculeis in seriebus duabus visis. 

 A vertice ellipticum. 



Long. 26 — 29, lat. 23 (sp. incl.), lat. isth. 7, crass. 15, long. spin. 0.7 — 1.3 «. 

 T. XIII, f. H, after Wallich Mscr. No. 130. 



It is doubtful wheter this is a Cosmarium or Xanthidium, but the acnlei seem 

 to relegate it to the latter genus. Cfr proposed aew sub-genus Micrac&nthum. 



12. X. brevicorne, n. sp. X. mediocre, cosmariiforme, tam longum quam latum; sub- 

 circulare; semieelluhe ovales, lateribus seriebus 2 aculeorum breviuin armata', apicali 

 parte glabne; membrana ut mihi visa glabra; sinu brevi, sub- acuto, rotundato. A 

 vertice visum ellipticum; a latere modice constrictum, semieelluhe globosa^, aculeis in 

 lineas 2 verticales ordinatis. Semieelluhe ventre non tumescentes. 



Long. 56j lat. sp. incl. 52, lat. isth. 26, long. spin. 2.5 ,u. T. XIII, f. 9. 

 Central India. 



