114 CARL BOVALLIUS, THE OXYCEPHALIDS. 



schlank und gracil, mit sehr diinnen Beineii. Das verschmolzene Caudal- 

 segment stabformig verlangert, ebenso die Basalglieder der beiden vordern 

 Caudalgriffelpaare, welche mindestens 4 bis 5mal so lang sind als ihre 

 lanzetformigen Endaste (Annaherung an Rhabdosoma))). 



From the description given by GLAUS in 1879 the following new 

 details are taken: 



Antennen des Mannchens mit hakenformigem Zapfen am 



Ende des Stammes, die des Weibchens von massiger Lange. Die An- 

 tennen des zweiten Paares ausserordentlich verlangert. Beine diinn und 

 schlank, das letzte Paar klein. Die beiden vorderen Paare mit stark 

 gezahnter Greifhand. Die Seitenfliigel der Abdominalsegmente unbe- 

 waffnet. Das Caudaldoppelsegment stabformig gestreckt, drei bis viermal 

 BO lang als die schmale Schwanzplatte)). 



COLOUR. (?) 



LENGTH. About 10 mm. (CiAus). 



HAB. The Indian Ocean, the Gilolo-Passage. (GLAUS). 



The family XipllOCeplialidaB, n. f. 



Diagn. The head is much elongated, provided with a narrow neck, 

 and a long, needle-shaped rostrum. 



The eyes are large, but occupy only a short space of the 

 length of the head. 



The first pair of antennae are curved (cf), and fixed on the 

 under side of the head; the first joint of the flagellum is 

 very large, and tumid, the following joints are few in mumber, 

 and subterminal (d 1 ), or wanting ($). The second pair are 

 fixed on the under side of the head, are long, slender, and 

 folded four times (d), or entirely wanting (g). 



The mouth-organs are reduced, the maxillae being rudimentary; 

 the mandibles are provided with a much elongated palp (<J), 

 or without a palp (9). 



The third, fourth, fifth, and sixth pairs of perceopoda are 

 walking legs; the femur of the fifth and sixth pairs is not 

 transformed. The seventh pair are transformed into a blad- 

 der-like sac. Ovitectrices are wanting. 



