276 Miscellaneous. 



Spirontocans Herdmani. 



No postocular spine ; dorsal carina beginning rather in front of 

 the middle of the carapace ; rostrum horizontal, with subparallel 

 margins reaching a little beyond the end of the peduncle of the 

 inner antennse ; upper margin with five teeth, of which two are on 

 the thorax, lower with one tooth near the point. 



Heteromysis odontojjs. 



Differs from the other species of the genus in having a tooth on 

 the ocular peduncles, in the shorter carpus of the first pair of legs 

 and the different jointing of the remaining tarsi, and in the lateral 

 margins of the telson being spinous along their whole length. 



Janira occidentalis. 



Front of the head 3-lobed ; telson with entire lateral margins 

 produced into an acute posterior tooth ; the posterior margin wider 

 than the length of each lateral margin. 



Paramphitlioe pacified. 



Very near P. asshnilis, G. 0. Sars, but differs in having no teeth 

 on the lower margins of the first three coxal plates, in the smooth 

 margin of the first joint of the perseopods, and in the different form 

 of the hind margin of the third pleon segment. 



M^EOiBEs, gen. nov. 



Differs from Mcera in having a strong mandibular palp, equal 

 upper and lower antennae and last two pair of perseopoda ; the last 

 pair of uropoda scarcely projects beyond the second pair. 



Mceroides Tliompsoni. 



The second gnathopod has a strong tooth on the propodos at the 

 base of the dactylus, across which it projects. 



AoROTDES, gen. nov. 



Characters of female as in Microdeutopus and Aora, except that 

 the mandible has a very slight and almost naked palp and the upper 

 antennae are entirely destitute of an accessory appendage. Only 

 females were taken. 



July 10, 1898. 



