looo General Notes. [December, 



ZOOLOGY. 



A NEW GENUS AND SPECIES OF THE CRUSTACEAN FAMILY LyNCO- 



DAFnmDJE}—Lyncoda/>knm, gen. n. (Plate xvi, Fig. 1-4). Form 

 much as in species of Alonella, etc., truncate behind ; superior 

 antennae like Macrothrix, attached movably to the end of a blunt 

 prominence beneath the head; second or swimming antennae 

 slender, four-jointed ramus with three long setae and a stout thorn 

 at the end of distal segment, the joint following the short basal one 

 with a thorn above, the following joint unarmed (!) ; three-jointed 

 ramus as in Macrothrix, the basal segment armed with a much 

 elongated seta ; eye relatively small, pigment fleck {macula nigra) 

 present; intestim ,.v < volutcd cxp nded in front of the "rec- 

 tum, opening in the " heel " of the post-abdomen; post-abdomen 

 slender, sub-triangular, margined behind with a double series of 

 spines; terminal claws large, and furnished with a long and short 

 spine near the base ; shell margined below by stout movable 



Few more interesting forms thar 



1 the one forming the type of 



this very peculiar genus have bee 



11 found, since it combines in a 



curious manner those characteristi 



es hitherto regarded as distinc- 



tive of the families Daphnidse and I 



.vnceidne. Kurz savs r " Keine 



cladocerenfamilie bildet eine so stn 



:ng in sich abgegrenztes natur- 



liches Ganze, wie eben die Lynceic 



1 n, and thisnttet re< .gn zing 



the relationship of Macrothrix an 





by placing them in the sub-famih 



v- Lvncodaphnidae. The form 



above referred to, however lias qu' 



ite as close affinity to the Lyn- 



ceidae as to Macrothrix, though , 



t resembles the latter rather 







the animal back of the heart and e 



: two portions mde- 



pendently, it would be impossible 





Macrothrix and the body to some 



Lynceid genus. Thus is fur- 



nished another of those curious int 



ermediate forms which remind 



us that the possibility of distinguis 



hing families and genera, lies 



alone in the meagerness of our km 



fledge. 



There can be no doubt that this 



g« n ,s should stand next to 



Macrothrix, but it will be necessar 



/ to modify a little the diagno- 



sis of the Lyncodaphnidae to recei" 





other 



oceras,p. 134. Dod P. E. Mfttler, p. H- 



jdekas neuer Cladoceren nebst einera kurzen Ubersicht, der Clad- 



