BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 95. N:O 8 13 
112 NI (Jelineckuwvar.?y acuta Cr. NN. Sp. This form re- 
sembles very much the N. Jelineckii, but its ends are 
cuneate and pointed, not rounded. The ends are con- 
nected by a very sharp and visible keel. The strixe are 
very visible, 11 in 0,01 m.m. (The N. Jelineckii has 
14 in 0,01 m.m.) Fig. 20. 222: — Virgin Ids. not rare. 
113. N. longissima (Köra), NG isobthatå Wu Sår (BD: Ph 
14 fig. 119) — St. Bartholomew, very rare. 
114. N. (longissima var.?) ventricosa Kitton (Micr. Journ 
1873 Pl. 38 fig. 5) St. Bartholomew, rare. 
115. N. (longissima var.?) curvirostris CL. N. Sp. Valve lan- 
ceolate, with the ends produced in long horns, curved in 
the same direction. Puncta distinct 5 in 0,01 m.m. 
L. 0,35 m.m. — Fig. 21. 222 — St. Bartholomew, only 
one specimen. "The strie are Sbtobabl very fine. I could 
not sec them on a specimen, mounted in balsam. — In 
Rab. Aig. Eur. No. 2481 has Mr. SCHWARZ given a de- 
lineation of a similar form from Vera Cruz. 
Some very interesting forms of the genus Nitzschia occur 
in the caribbean province near Campeche Bay. Mr. KITTON 
(Micr. Journ. 1874, 218) regards them as belonging to a new 
genus, called Perrya. With the kind permission of Mr. GRUNOW 
I can here publish their diagnoses, given by Mr. GRUNOW. 
»Nitesclhia (Perrya) Weissflogii GrRunow. Valves resem- 
bling a long and very narrow boat with very sharp keel, 
smooth or covered with minute irregularly scattered granules, 
which form coherent longitudinal rows only on the ÖN and 
near the margins of the valve. The keel is besides marked 
by a row of transverse short bars, which (as in all other Nitz- 
shiex) lie in the interior side of the valve and are fastened 
to each side of the valve. Length: 0,155—0,32 m.m. (and 
perhaps more). -Campeche Bay. 
var. a subglabra valves almost smooth, fig. 22. 2 a upper 
side 8 lower side. 
var. B sparsa valves covered with irregularly scattered 
minute granules, fig. 23. 222 a« upper side, 8 lover side. 
ar. y interrupta. Keel-bars lengthened, and interrupted 
two or three times, fig. 236. 22. I have seen only a frag- 
ment of thes interesting form, which seems to be very great. 
It is a connecting member between N. Weissflogii and N. 
pulcherrima.» 
