477 



Spirlinus bipunetatus, as figured by Fatio, is of the same general 

 type, with no basal radii, but has only about eight apical radii, Bliodeus 

 having about tAvice as many. I have scales of Acanihorhodeus taeni- 

 analis from Shanghai (Swinhoe), and these are very broad and short 

 like those of Riiodetis. The middle apical radii are wavy or zigzag, and 

 this peculiarity is also seen in the radii of Paracheilognathus rltombea 

 (Schleg.) from Japan. 



Alhurnus. 



Alburnus liicidus Heck. Lake Wenern, Sweden. Scales about 

 3^/2 mm long and 5^2 broad, thus well distinguished by their shape 

 from those of all Leuciscus^ Abramis (except ballenis) and Barbus. On 

 account of the broad form, they may be compared with Bhodeus, but I 

 do not think any real affinity is indicated. The nucleus is subcentral, 

 the circuii are rather coarse, and the radii are rather poorly developed ; 

 there are about five to eight apical radii, and only indistinct traces of 

 basal ones. 



Alburnus fiUppri Kessl. Souj Boulak (N. T. Günther). Scales 

 about 3 mm long, and a little over 3 broad, subtriangular in form, the 

 corners broadly rounded. Circuii coarse; apical radii well developed, 

 about 9 to 12; basal radii feeble and more or less broken, yet evident 

 and rather numerous. The nucleus, while basad of the middle, is not 

 nearly so much so as in Gobio. This is readily distinguishable from A. 

 Ittcidus; it strongly approaches Chondrostoma. 



Chondrostoma. 



I have discussed this genus in Proc. Biological Soc. Washington, 

 XXn, p. 210. The scales vary on the same fish from subquadrate to 

 subtriangular, always with the apex broadly rounded. The number of 

 apical radii also varies greatly on the same fish, as has been pointed 

 out to me (in C. soetta) by Mr. Regan. In general terms, the Chon- 

 drostoma scale may described as about as broad as long, with evident 

 (rarely evanescent) laterobasal angles, strong apical radii and irregular 

 but evident basal ones, no lateral radii, apical circuii very coarse. The 

 last character is especially distinctive. The specific differences (five spe- 

 cies examined) are rather feeble. Some Barbus, as B. caliensis from 

 Algiers, have very Cho)idrostoma-\ike scales. 



Gobio. 



Gobio fluriatilis = vulgaris = gobio. River Neckar near Canstatt. 

 Scales about 4 mm long and 5 broad, inclined to be subtriangular; nu- 

 cleus very near the base; no basal radii; numerous (about 25) apical 

 radii; lateral circuii coarse and well defined; apical circuii wanting, 



