76 SALMONID^. 



from the origin of the dorsal fin to the lateral line has twenty-eight 

 scales; that from the hinder end of the adipose forwards to the 

 lateral line has fifteen scales; there are twenty-one longitudinal 

 series between the lateral line and the root of the ventral. Scales 

 rounded, without median ridge. 



Coloration the same as in the male specimen. 



Pyloric appendages forty- one. 



B. Species with a limited geographical range. 

 I. Algeria. 



5. Salmo macrostigma. 



Salar macrosti^a, Dumeril, Rev. et Mag. Zool. 1858, no. 9. pi. 10. 

 Salmo lapasseti, Zill, Ann. Sci. Nat. 1858, i. p. 126. 



D. 13-14. A. 11. V. 9. P. 13. L. lat. 122. L. transv. 27/34. 

 Ccec. pyl. 28-31. Vert. 57. 

 This Trout is very closely allied to S. fario, and distinguished by 

 the small number of pyloric appendages. It has a somewhat less 

 broad and strong maxillary bone, not extending beyond the vertical 

 from the hind margin of the orbit in specimens 6 or 7 inches long ; 

 a short prseoperculum with scarcely any lower limb ; and the vome- 

 rine teeth arranged in a zigzag series. The length of the pectoral is 

 more than one-half of the distance between its root and that of the 

 ventral, the trunk being comparatively short. Body with ocellated 

 spots, the Parr-marks being still very distinct La specimens of the 

 size indicated, which do not appear to be adult*. Dorsal and anal 

 fins with a black and white anterior margin. 



This is the southernmost species of the Salmonoids of the Old 

 World ; it resembles much the young state of the more developed 

 northern species S. fario. From the Oued-el-Abaich, Algeria. 



a-c. From 6 to 7 inches long. Algeria. Presented by Dr. Schimper. 



Description of a Female specimen seven inches long ; ovaries 

 developed ; ova minute. 



The greatest depth of the body is below the origin of the dorsal 

 fin, equal to the length of the head, and one-fourth of the total length 

 (caudal not included). Snout short, obtuse, but more than half the 

 length of the postorbital portion of the head. 



The length of the maxillary bone is somewhat less than that of 

 the snout together with the diameter of the eye, its greatest width 

 being two -filths of the latter. Teeth of moderate strength ; those 

 of the vomer are arranged in a zigzag series, but the points are so 

 much bent towards the right and left as to give the appearance of a 

 double series. The interorbital space is flat, with a slight median 

 ridge, the eye being placed somewhat below the upper profile; the 



* M. Dumeril considers these Parr-marks a specific character; they are com- 

 mon to all Salmonoids of a certain age. 



