KONGL. sv. vi.i. AKADEMIENS HANDLINGAR. BAND. 34. \':o 8. \'A 



almost lik»' a Homalonotus, and the hypostoma of which has been parth delineated in 

 this memoir, seems to be the rea] one. They differ both in the shape of the hypostoma 

 as well as in other respects. 



Barrandia Mai Coy. 



According to Saltek Monogr. pl. Ii) fig. 9 his B. Portlock i, of which there is a I 

 mentary and broken hypostoma, shows feeble traces of oblique macula?, nearh in fchc 

 Pashion of Asaphus. In the description at page 139 19 told aboul the usual pair of 

 tubercles». 



Bronteus Goldfuss. 



Barrande delineates the macuke on the hypostoma of 



11. palifer Tab. 4"> fig. 17. 



11. planus, Tab. 48 fig. 7. and 

 in the supplementär volume of 



II. rhinoceros, Tab. 9 t'. ln\ 



B. furcifer, Tab. 11 fig. 16, but there is not the slightest indication of granulation 

 on any of them, tior is there in the descriptions, generic or specific, the least mention made 

 of the tubercular maculse. It is also remarkable that in the works of Angelin and Noväk 

 where several hypostomas belonging to species "I this genus are delineated, not a single 

 one shows these tubercles. We shall now continue the descriptions of the Swedish Bron- 

 tei, already begun with Br. polyactin in the introduetory part of this memoir. 



Bronteus irradians Lindstr. 



Pl. II tigs. -4—5. 



has a hypostoina that much resembles that of Br. polyactin. In its general shape it is 

 similar and the two concentric grooves with the two maculae placed in the same way, 

 just below the superior groove. These maculte are much larger than in Br. polyactin, 

 nearly thrice their size. They are also more ovate or rather like a bean. the smooth 

 snrface is larger and the granulated spöt restricted to a more narrow spaee forming an 

 oblique patch. The granules or lenses are also individually larger than in the allied 

 species, double their size or 0,oe millimeters. We have not succeeded in making sections 

 of the cephalic eye nor of the maculae. 



Br. platyactin Angelin. 



Pl. II f. 14 — 19. 



The hypostoma has a transversally triangulär form, and is divided only in two 

 fields through a shallow semicircular groove near the posterior margin. The two maculas 



