ISOPODA. 1 l J 



Family: OOKALLANID/E. 



It is only necessary here to recall that the family embraces the genera Corallana, 

 Dana, Taclum, Schiodte and Metnert, Alcirona, Hansen, and Lanocira, Hansen, 

 with Hansen's definition of the family Alcironidre transferred to the modified family 

 ( lorallanidse. 



Lanocira, Hansen. 



1890, Lanocira, Hansen, ' Vid. Selsk. Skr.,' ser. 6, vol. 5, pt. 3, pp. 287, 313, 391, 395. 



1904, Lanocira, Stebring, in Gardiner's 'Fauna, Maldive and Laccadive Archip.,' vol. 2, pt. 3, p. TOG. 



The species may he distinguished as follows : 



TThe hinder part of the body not setigerous. 1. L. kroyeri, Hansen. 



I The hinder part of the body setigerous '2. 



f Head (of male) with frontal horn. 2. L. gardineri, Stebbixc. 



I Head without frontal horn 3. 



/ Telsonic segment with broadly rounded apex-. 3. L. rotundicauda, StebbiNg. 



L Telsonic segment with narrowly rounded apex. 4. L. zeylanica, n. sp. 



Lanocii-a gardineri, Stebbing. 



1904, Lanocira gardineri, Stebbing, in Gardiner's ' Fauna, Maldive and Laccadive Archip.,' 

 vol. 2, pt, 3, p. TOG, pi. 51 A. 



For the features which may apparently be relied on for distinguishing this species 

 from L. zeylanica, see the next following account of the latter form. 



Locality : One specimen of L. gardineri was taken at the Galle reef, with 

 compound Ascidians and some other Isopods. A second was taken along with some 

 small sphreromids at Cheval Paar, and a third was labelled " Gulf of Manaar," 



Lanocira zeylanica, n. sp. Plate V. (B). 



The general resemblance of this species to L. gardineri, which I have recently 

 described from the Maldive-Laccadive Archipelagoes, is extremely close. The dis- 

 tinguishing features are that the present form has the body from the fifth peraeon 

 segment to the extremity of the pleon far more strongly setigerous ; that it has the 

 front of the head with a well-marked margin and a faintly indicated longitudinal 

 depression behind it, but no upturned frontal horn and no pair of dorsal tubercles 

 between the eyes; that the first maxillse are stronger; and that the fifth perseopods 

 are armed on the third and fourth joints with far longer spines. As in the other 

 species the second maxillae are tipped with two setse, but the difference in length 

 between the two is greater here. The apical spine of the fourth joint in the first 

 gnathopods is here stronger. 



The eyes are dark. The first antennas have a flagellum of five joints carrying 

 sensory filaments. The mandibles with bi'oad base and slender trunk exhibit an apical 



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