446 
covered are too few and not important enough for necessitating the 
establishment of a new family, and I feel justified in referring the 
new species to the family Asterocheridæ. 
It is easily seen that our animal can not be referred to any 
of the genera accepted in Giesbrecht's work. He has referred his 
twenty-one genera to five sub-families, but the new genus, Echi- 
nocheres, agrees badly with the diagnoses of these divisions; I must 
therefore establish a new sub-family, Echinocherinæ, and will 
attempt to produce a diagnosis as far as possible in accordance 
with those of Giesbrecht. 
Diagnosis of the Sub-family Echinocherinæ. Female. Thoracic 
segments rounded on the sides; head together with the first thoracic 
segment longer than the rest of the body. Abdomen of the female 
with only one segment between the genital segment and the furca. 
Antennulæ with twelve joints; the penultimate joint with a very 
long olfactory seta; some of the joints with a number of rather 
short to moderately long, robust setæ which have their end some- 
what thickened and generally emarginate. The antennæ shorter than 
the proximal part of the maxillipeds, with a very long, strong and 
somewhat curved terminal seta; the exopod oblong. Sipho nearly 
vertical on its surroundings, considerably compressed, seen from in 
front obløng oval with a short terminal tube. Mandibles without 
paålp. Maxillulæ very small, with both branches. Maxillipeds mode- 
rately distant from each other, their proximal part is one-jointed, 
the distal part two-jointed (the long setiform hook not included). 
First pair of natatory legs with the inner ramus two-jointed, the 
outer three-jointed; the three following pairs normal, with three- 
jointed rami; the inner branch of the third (and fourth) pair termina- 
ting in one long, flattened spine serrated along the outer margin. 
Fifth rudimentary pair with the terminal joint oblong and rounded. — 
Parasitic. 
As long as only the female of one species has been studied a 
diagnosis of the genus would, in my opinion, be very deficient, 
especially when the diagnosis of the sub-family has been given. 
