314 TAGE SKOGSBERG 



in groups. Apart from tlu> bristle of tlic ciulitc this joint is quite without bristles. Basale: Of 

 the ventral bristles one d-bristle is very long; it has a moderate number of long secondary bristles 

 arranged in irregular wreaths and has short, fine hairs distally; the rest, most of which are short, 

 have short hairs or arc bare. Dorsally this joint has three bristles. Endopodite: The 

 first joint has four bristles ventrally. The end joint has seven bristles, the two middle ones of 

 which are rather powerful, claw-shaped, of about equal length and strength. 



Maxilla: — P r o t o p o d i t e: Dorso-distally the coxale has a single bristle with 

 long, tine hairs. The proximal bristle on the outside of the third endite, which is always developed 

 in other closely-related sub-genera and genera, does not seem to be developed. On the boundary 

 between the basale and the first endopodite joint there are two bristles, one situated close to 

 the exopodite and the other at about the middle of the inside of the palp. Dorso-distally on the 

 coxale there is a rather large, somewhat lamelliform e jj i p o d i a 1 appendage. The 

 exopodite is comparatively well developed and has fine, long hairs situated close together; 

 it is not displaced distally. The endopodite is broad and moderately long. 



Sixth limb: — The second exopodite joint is rather short and somewhat rounded, 

 with comparatively few bristles. Its posterior bristles are not strikingly larger than the others. 



Seventh limb: — This is furnished with very few, ten at most, cleaning bristles, 

 some of which are concentrated distally, the others situated irregularly more proximally; with 

 regard to the latter it may be mentioned that there is never more than one bristle on the same 

 side of the same joint. The end comb consists of a comparatively small number of teeth, all 

 of one kind, the distal ones often being exceedingly long, the proximal ones short. Dorsally 

 close to the end comb the wall of this limb is only weakly or not at all thickened and only quite 

 weakly concave. Although there is no special adductor, it seems as if this concavity can be 

 compressed somewhat (like a jaw), as I have sometimes seen in preserved material the teeth 

 of the end comb pressed inwards. 



F u r c a : — The lamellae are moderately elongated. There are nine claws, which show 

 no or rather slight signs of division into main claws and secondary claws. 



The upper lip is very characteristic for the genus. It is rather large and has six 

 processes, of which the two anterior ones are unpaired and the other four paired. The posterior 

 two are shaped like fingers, the others are verruciform, but are, however, at least as long as they 

 are broad proximally. These processes include the openings of the very strong glands of the 

 upper lip, which secrete a luminous matter. (The two unpaired dorsal ones correspond to the 

 dorsal field of glands in closely-related forms, just as the ventral ones do to the two paired ones'?) 



The rod- shaped organ is rather short and thick. 



The lateral eyes are well developed. 



All the species are distinguished by their strong phosphorescence. They rise to the 

 surface of the sea at nights. 



Tropical seas: Indian and Pacific Oceans. 



The name of the - Remarks: — The name Cypridina has formerly been used for many heterogeneous elements 



sub-genus. belonging to the sub-order Cypridiniformes. 



