KONGL. fSV. VIOT. AKADKMIENS IIANDLINGAK. I5ANI) 26. N:() 2. 21 



mncronate on inner side. Connectin<ij zone complex, with 4 to 5 divisions in (),(»i mm. Along the keel 

 is a row of puncta, 7 to 10 in 0,oi mm. StricU 35 to 40 in 0,01 ram., extremely difficult to resolve. 



— Amphora'^ insecta A. S. Atl. XL f. 2, 3. AmpJiora mucronata H. L. Sm. Types N:o 38. Am. 

 Qn. M. J. 1S78 p. 17 PL III f. 9. 



Marine and pelagic: Sweden, (xullmarsfjord on Zostera! Honduras (Grun.), Atlantic City 

 (H. L. Sm.). 



A probal)ly allied, and very large, form is Amphora? incerfa A. S. Atl. XL f. 1 from Balt- 

 schick. The specimen figured is too imperfect to admit of a description. It is i)robably the same 

 species as Amphiprora punctata Pant. HI PL XXXIX f. 547. 



5. A. complexa Greg. (1857). — Fri;stule quadrate with roiinded angles, constricted in the 

 middle. L. 0,089 to 0,102; B. 0,07 mm. Connecting zone with 7 to 8 divisions (about 2 in 0,oi mm.) 

 transversely striate. V. with reniform outline, and very excentric elevated keel, along which is a 

 row of puncta, about 8 in 0,oi mm. Strice of the valve curved and divergent from the central 

 nodule, about 20 in 0,oi mm. — Amphiprora complexa Greg. D. of Clyde p. 508 PL XII f. Q'2. 

 Auricula Ontrcea Temp. a. Brux. D. foss. du Japon p. 25 PL IV f. 7 (1889)? 



Marine, pelagic: Scotland! Balearic Islands! Rembang Bay (Debys Coll.)! Japan, fossil (Br. 

 a. Temp.)? Barbados! 



This species, remarkable for its excentric keel, is rarely found in entire frustules, the thin 

 connecting zone being usually detatched in the course of preparation from the more silicioiis valves. 



A. Ostrgea is in all respects similar to A. complexa, except as to the number of strise, which ac- 

 cording to Brun and Tempore are only 7 to 9 in 0,o 1 mm. 



6. Auricula niinuta Cl. N. Sp. — Frustule (juadrate with rounded angles. L. and 



B. 0,02 to OiO.'j mm. Zone thin with about 7 divisions in 0,oi mm. V. reniform, very slightly 

 indented in the middle. Margin with a row of puncta (7 in 0,01 mm.) along the median line. 

 Stride about 25 in 0,oi mm. delicate, almost parallel in the middle, curved at the ends. — 

 PL I f. 7, 8. 



Marine: Sweden, Gullmarsfjord on Zostera and among Amphipleura (Berkeleya) Dillwynii, 

 frequent ! 



7. A. intermedia Lewis (1865). — Frustule elongated, rectangular with rounded angles, very 

 slightly constricted. L. 0,07; B. 0,03 mm. Median line strongly inflected towards the centre of 

 the frustule. Along it is a row of puncta, 5 in 0,oi mm. V. in outline narrow, reniform. L. 0,07 

 to 0,11; B. 0,02.') mm. Median line excentric, diverging from the central nodule towards the dorsal 

 side of the valve. Strire 15 to 16 in 0,oi mm. curved and divergent towards the median line. — 

 AmpJiora iutcrnicdia Lewis. Proc. Philad. Ac. Nat. Sc. PL I f. 7 (1865). Auricula japonica Br. 

 and Tempore, U. foss. du Japon p. 25 PL IV f. 8 (1889). 



Marine: Adriatic! China! .Japan, foss. (Br., Temp.), South Pacific Ocean (Van Heurcks Coll.)! 

 Port Jackson! New Jersey (Lewis), Honduras (Grun.). 



8. A. javanica Cl. N. Sp. — Valve linear-lunate, very slightly constricted in the middle. 

 L. 0,17; B. 0,0 2 6 mm. Median line very excentric not inflected, close to the margin of the valve 

 and not bordered by a row of puncta. Strife 8, 5 in 0,oi mm., almost transverse, finely punctate. 



— PL II f. 22. 



Marine: Sumbava (Kinker Coll.)! 



9. A. Amphitritis Castrac. (1873). — V. reniform. I;. 0,05,'); B. 0,02.^ mm. Keel very 

 excentric, closer to the outer margin, to which its exterior wall is vertical. The interior wall 

 seems to be elevated in the middle, and to slope gently towards the somewhat sinuose interior 

 margin. Strite about H in 0,oi mm., undulating, not distinctly punctate, on the interior wall of 

 the keel alternately longer and shorter towards the keel, to which they diverge. — Castr. Atti del 



