358 REPORT — 1866. 



produce sucli an appearance. Mr. Ingall has observed an excavation in the 

 mountain-slope. 



At the north point of IV A^ Ms a crater, IV A^ ^, probably a little larger 

 than either IV A^* qj. IV A^^, and this has a minute craterlet on the east, 

 and also one on the west. 



The crater IV A^ ^ has a " furrow " crossing the interior of the south-east 

 waU, in the direction of the crater-row IV A^^MV A^ '9 (see IVA^^O^^ 

 It is worthy of remark that a prolongation of this crater-row and furrow will 

 pass through the bright mountain IV A^^^. 



t2. A pass or " gully" in the south end of IV A'' ^. 'Eecorded in Obs. 

 Bk. 1864, Sept. 22" 15"^ 45™ G. M. T. No. 292, p. 102, Roy. Soc. 4i, 

 power 230. Definition " very good." 

 *3. A depression or crater on the N.W. border of Ptolemteus, Length 

 S.S.W. to N.N.E. 9"-03, breadth W.N.W. to E.S.E. 4"-76. 

 **4. The N.W. of two craters S.W. of IV A^^ 5"-23, mag. 0-33. 

 **-5. The S.E. of two craters S.W. of IV A^^ 4"-76, mag. 0-32. 

 Lohrmann gives both these craters, and mentions them in his text (Topo- 

 graphic der Sichtbareu Mondoberflache, erste Abtheilung, p. 55, Sec. I. X). 

 Beer and Mjidler give only one. 



**6, A crater on the S,E. border of Hipparchus 6"'66, mag. 0-44. i of 



B. & M. 35. Sec. I. of Lohrmann. 



**7. A crater just north of IVA^l 6"-18, mag. 0-40 (Beer and Mad- 



ler's position of the second order K is indicated by 7 X on IV A^ ''). 



IVA^l, IVA?^ IV A^^ IV A^ 6, and IV A^^ form a very interesting 



and conspicuous group, the conformation of 1, 4, 5, and 7 contributing to 



its being easily found at some distance from the " terminator." 



iS. The S.W. of two small dimples just S.E. of IV A^ ^, estimated 3"-5, 

 mag. 0-21, 



+9. The N.E, of two small dimples just S.E. of IV A^^, estimated 3"-5, 

 mag. 0-21. 

 IV A^' s and IV A^ ^ are both recorded in Obs. Bk. 1864, Sept. 22<' 16" 0™ 

 G. M. T., No. 292, p. 103, Boy. Soc. 4i, power 230. Definition admii-able ; 

 they are difficult objects. 



*10. A crater on the interior N.W. border of Albategnius 6"-18, mag, 

 0-37. Position of second order X 10 on its S.E. margin, 

 11. HipPAECHus. — Lolirmann's map 233, the S.E. part. 

 The S.W. part is shown in area IV A''. The floor of Hipparchus 



is convea', the highest part being in the neighbourhood of IV A^ ^^, probably 

 the cliff IV A? 38. 



*12. A crater south of IV A? i. Q of B. & M. ? Longer axis W.S.W.- 

 E.N.E. 8"-56 ; shorter axis N.N.W.-S.S.E. 6"-66, rang. 0-46. 

 Although a point of the second order, tliis crater appears to be wrongly 

 placed by B. & M. There does not appear to be a crater either on the pho- 

 tograph of February 22, 1858, or on Lohrmann's Section I., between IV A^^ 

 and the angle formed by the walls of Albategnius and Ptolcmfcus. In this 

 angle on the photograph is a crater, which I take to be B. & M.'s G. The 

 position of second order, 12 X , comes upon its west margin. 



13. The S.W. of three cratcrlets cast of IV A?l 2"-85, mag. 0-18. f. of 

 B. 6: M. 



