

794: CRUSTACEA. 



Subtribe SEROLIDEA. 



Family SEROLULE. 

 Serolis planus. 



Corpus fere planum. Segmenta 1-6 thoracis lateraliter vix producta, 

 tota usque ad marginem strictd appressa. Segmentum caudate juxta 

 marginis lateralis medium unidentatum, dente vix marginali, super- 

 ficie costd obliqud carente sed costam medianam parvulam et aliam 

 prope marginem ante dentem lateralem habente. Antennarum 2darum 

 articuli duo basales ultimi longitudine cequi. 



Body very nearly flat. First to sixth thoracic segments hardly pro- 

 duced backward at sides, all closely in contact quite to the lateral 

 margin. Caudal segment having a submarginal tooth near middle 

 of lateral margin; no oblique costa, but a small one at middle, and 

 another near margin either side anterior to the tooth. Last two 

 basal joints of second antennae of equal length. 



Plate 53, fig. 1 a, male, enlarged two diameters; b, opercular plate 

 of abdomen ; 1 c, part of flagellum of inferior antennae, 



Fuegia. 



Length, one inch; breadth, three-fourths of an inch. As the seg- 

 ments of the thorax are in contact quite to the lateral margin, the 

 margin of the body is very even and uninterrupted. The sixth seg- 

 ment is much less produced backward, either side, than that of the 8. 

 Gaudichaudii. Moreover, the articulation in the opercular abdominal 

 plates is much more nearly transverse, than in that species, and the 

 margin of the abdomen, above, has the tooth mentioned, situated just 

 below the termination of the marginal costa. The medial costa is 

 obsolete posteriorly. The eyes are rather near, and subcorneal. The 



