KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N':0 5. 37 



This extraordinary form in general outline is niuch like D. ovatum Nordst. 

 (Des. Brås. p. 205, t. III, f. 37, 1869), from which it differs iti being much smaller, 

 not so elegant in shape, in having a distinct constricted portion next to the suture, 

 also having an emargination and no dental prominences. Its most peculiar feature is 

 the emarginate end, which renders the form anomalous. Dr. Nordstedt suggests that 

 this may only be apparent (an eidolon specusl), and that it may consist of a double 

 prominence. This is possible, but I would ask, why should not a Docidium be emar- 

 ginate or fissured at the apices? I have an American specimen, (one segment being 

 like D. truncaium and the other D. nodulosum,) which is emarginate at both apices; 

 and in 1887 I obtained English specimens of those species, which I described (Natura- 

 list 1887, pp. 275 and 290) as D. nodulosum var. y labiatum, and D. truncatum var. 

 y emar ginatum; to which I may add that at first I mistook the fissured ends for 

 lateral prominences! I may be wrong, but the above figure was drawn as it seemed 

 to be. If Dr. Hansgirg (Prodr. Algfl. Bohm. p. 187) flnds a Dysphinctium with 

 emarginate apices, it is simply a similar case in a correlated form! 



44. D. rotundatum, n. sp. Fröns curta, lata, semicellulae late oviformes, ad basin semi- 

 cellularum maturarum (cell. copulativae?) uncinas internas tres; frondis longit. — 2V 2 -plo 

 låtit. Membrana crassa, valde punctata, achroa vel pallide luteola; apicibus truncatis, 

 angulis rotundatis; massa chlorophyllacea in fasciis irregulariter distributis, nucleos 

 amylaceos plurimos involventibus. 



Long. 200 — 215, lat. max. 80, lat. isth. 40, lat. apic. 25; membr. er. 2.6 f. 



Northern India; Bengal. T. VII, f. 2 a. 



As previously remarked, I cannot help but think that the uncinate sutural pro- 

 cesses must assist in the adhesion of the semicells, but it may be that they play a 

 higher part in securing the mntual cohesion of the opposing semicells at conjugation? 

 These little processes seem to be interna l ; for with the double semicells approximated 

 they are not visible. 



45. D. pyriforme, n. sp. Fröns sub-curta, lata; circ. 3 1 ,-plo longior quam lata, semi- 

 cellulae pyriformes (unde nomen specificum); membrana sub-crassa, valde punctata, semi- 

 cellulis ad basin constrictis, lateribus prolongatis (inter se?); apicibus truncatis, angulis 

 rotundatis, dentibus amplis conicis 6 munitis. Sutura? Semicellula unica tantum visa. 



Long. (semicell.) 96, lat. 54, lat. isth. et apic. 24, long. dent. 5.7 ,u. 

 T. VII, f. 3. 



Nearest D. ovatum Nordst. (Desm. Brås. p. 205, t. III, f. 37, 1869), from which 

 it differs in size, in the suture?, and in the dental processes. 



46. D. inerme, n. sp. Doc. curtum, latum, 2 1 / 2 — 3-plo longi.ua cpuam latins, oblongum; 

 semicellulae longe ovatae, basi inflätas, versus apices paullo attenuatae ^'el incavata>, 

 apices truncata?. Membrana achroa, glabra, apice incrassata; sutura fusca-brunnea, non 

 prosiliens, duplex vel fissa! A vertice visum orbiculare. 



T. IV, f. 2 b (basis sola!). After Wallich, Mscr. No. 92. 



»Endochrome in irregular tillets or patches .... No terminal vesiele obser- 

 vable», G. C. W. 



Long. 169, lat. max. 65, lat, isth. 38, It. apic. 20 ,". 



