KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 21. N:0 5. 



29 



1. LANCEOLA PELAGICA, TH. SAY, 1818. 



Diagn. Caput rosti*atum, ante excavatum. Oculi longitudinales. Segmentum primum pereii brevissi- 

 mum, segmentum secundum ac tertium longissima aequalia. Pedes pereii sexti paris quam 

 pereion longiores. Pedes septimi paris pedibus quarti paris longitudine asquales sed pedi- 

 bus quinti paris multo breviores. Pedes uri primi et secundi parium longitudine sequales. 



The head is rostrate, excavated anteriorly. The eyes are longitudinal. The first pereional 

 segment is the shortest, the second and third the longest, equal in length. The sixth pair 

 of pereiopoda are longer than the pereion. The seventh pair are as long as the fourth 

 pair, but much shorter than the fifth pair. The first and second pairs of uropoda are equal 

 in length. 



Colour. ? 



Length. 31 mm. 



Hal). The Gulfstream; captured by Capt. Hamilton. 



Syn. 1818. Laneeola pelagica, TH. SAY. — »An account of the Crustacea of the 



United States». Journ. of the Acad. 



of Natural Sciences of Philadelphia. 



Vol. 1, part. 2, p. 318. 

 Hyperia pelagica, » H. Milne Edwards. 1830. »Extrait de Kecherches pour servir 



a 1'Hist. nat. des Crustaces amphi- 



podes». Annal. Sc. Nat. Tome 20 me , 



p. 387. 

 » » » » 1840. Histoire naturelle des Crustaces. Tome 



3 me , p. 77. 

 Vibilia pelagica, » Spence Bate. 1862. Catal.Amph.Crust.BritishMuseum,p.3(>4. 



Although I have had several specimens of Laneeola for examination, I have not 

 succeeded in identifying any of them with Say's species; that which comes nearest it 

 is Laneeola Sayana, but it differs by the long fourth pereional segment, the short seventh 

 pair of pereiopoda, and the broad and long telson. I give below an extract of Say's de- 

 scription (1. c.) containing the more specific characteristics. 



The body is soft, the external covering membranaceous. 



The head is very short, transverse, the clypeus projecting into an acute angle, the 

 front concave. 



The eyes are longitudinal, placed opposite the base of the first pair of antennas. 



The first pair of antenna? are short, compressed, the basal joints short, robust, 

 concealed by the clypeus. The fiagellum is linear, compressed, obtuse, attaining the middle 

 of the. third joint of the second pair. 



The second pair of antennoe are longer than half the pereion, four-jointed, compressed; 

 the basal joints are very short, the third and fourth longer, equal. 



