| NGC | |
| 16 | Nucleus elongated along minor axis. |
| 128 | Nucleus notched. Surrounded by 3 small kD systems. Tidal arm? |
| 473 | Nucleus + ring. |
| 520 | Torn system with dust lane. |
| 750-1 | Connected. |
| 890 | Outer envelope very faint. |
| 1097 | Discrete hot spots in nucleus. |
| 1365 | Hot spots in nucleus. |
| 1808 | Nuclear hot spots. |
| 2545 | Ring. |
| 2742 | Companion like 5194-5? |
| 2775 | Far:kD3. |
| 2976 | Rather smooth intensity. |
| 3351 | Hot spots in nucleus. |
| 3384 | Distant :kD6. |
| 3395 | 3395 and 3396 connected. |
| 3396 | 3395 and 3396 connected. |
| 3414 | Bar only. |
| 3607 | Dust. |
| 3628 | Nuclear region obscured by dust. |
| 3665 | Dust arc. |
| 3681 | Elongated nucleus. |
| 4038-9 | Large irregular double loop. Inner, bright part, loops of bright H II regions. |
| 4041 | Hot spots in nucleus. Near, gS1-gD1; distant, gkS1-gkD1. |
| 4064 | Hot spots in nucleus. |
| 4128 | Circular nucleus. |
| 4314 | Small S in nucleus. |
| 4321 | Hot spots in nucleus. |
| 4324 | Ring around nucleus. |
| 4341 | Much brighter than 4342. |
| 4395 | 4395-9-4400-01 one object. |
| 4435 | Bar only; circular nucleus. |
| 4496 | Two overlapping systems? |
| 4567 | 4567 and 4568 in contact. |
| 4568 | 4567 and 4568 in contact. |
| 4569 | Or gS5p. |
| 4594 | kD-kS system with heavy dust lane. |
| 4712 | Or afS5. |
| 4753 | Dust. |
| 5248 | Hot spots in nucleus. |
| 5253 | Bright central concentration of hot spots? |
| 5394 | Wisp. |
| 5485 | Dust. |
| 5633 | Multiple hot spots in nucleus. |
| 5653 | Distant, kD3; like 5633; nucleus spotty, but very bright. |
| 5678 | Like 5633 and 5653; multiple hot spots in nucleus. |
| 5689 | Distant, kD6. |
| 5701 | A small fgS1: shining through. |
| 5866 | Dust lane. |
| 6946 | Obscured. |
| 7332 | Strong plate: kD7; weak plate: g?D7. |
| 7469 | Or gD3p + ring; N. |
| 7625 | Or f?I?p. Turbulent elliptical with dust. |
| 7742 | Brilliant ring. |
| 7814 | Heavy dust lane. |
While the present material includes most bright galaxies north of the equator, it does not have the completeness that could be desired for detailed study of the above mentioned characteristics. It is hoped in the future to extend the form classification to a fainter limit, so that such problems can be investigated with precision.
The development of the new system and the classification of the galaxies listed were carried out during a two-month period as guest investigator at the Mount Wilson-Palomar Observatories in the fall of 1957. The writer is deeply indebted to the Mount Wilson-Palomar Observatories for the use of facilities and the plates in the unique Hubble collection. An especially great debt is acknowledged to Drs. I. S. Bowen and A. R. Sandage; without their cooperation this work could not have been carried out. Acknowledgment should also be made to Dr. N. U. Mayall for a critical reading of the manuscript.