-...79 CRUSTACEA. 



very unlike those of that species ; in this, the long spiniform immove- 

 able finger extends transversely; the moveable finger is terminal, 

 while in the /era it is medial ; moreover, the moveable finger is quite 

 stout and does not enlarge towards the extremity. The spiniform 

 immoveable finger has on its inner side a rasp-like surface. Of the 

 last three joints of the male right antenna, the antepenult is much 

 the longest; the posterior penult seta is a little longer than the apical 

 joint; the other subapical setae are shorter. 



Genus CATOPIA, Dana. 



Quoad antennas posticas et lmbitum antennarum antiearum Calano af- 

 finis; antennam maris anticam dextram Pontellae affinis. Oculi 

 superiores nulli. Oculus inferior unicus (?). 



Allied to the Calani in the posterior antennae and the position of the 

 anterior; and to the Pontellce in the right antenna of the male. 

 Superior eyes wanting. Inferior eye single (?). 



The species of this genus observed, has the habit of a Calanoid 

 Pontella (P. elliptica, &c.) ; the anterior antennae having a double cur- 

 vature with the tips not in advance of the line of the front, and the 

 posterior having three setae to apex of one branch, and several seta* 

 on back side of first joint of same branch. Like the Pontellae, it has 

 the right male antenna geniculating. The setae of these antennae are 

 short, and are arranged along the anterior margin. It differs from the 

 species of all other Calanidae observed, in having no superior eyes. 

 The lens of only one inferior eye was observed, although the specimen 

 was examined with much care. It presented a distinct spherical lens, 

 of unusually large size, with deep red pigment behind. The pigment 

 was deepest in colour at a distance from the lens, and anteriorly 

 about the inner portion of the lens there was an orange-yellow colour. 



Catopia, Dana, Proc. Amer. Acad. Sci., ii. 25, where the following new species is 

 described by the author. 



