MACRURA. 81 



Nauticaris unh'ecedens, Sp. Bate. 



Nauticaris unirecedens, Sp. Bate, '"Challenger" Macrura,' p. 608, 1888. 

 Localities: Galle (Station XXXV.), 5 specimens; Jokkenpiddi Paar, 1 specimen. 

 These specimens agree closely with Sp. Bate's description, but the rostral formula 

 is slightly different. The Ceylon specimens are not so richly toothed as the 

 " Challenger " specimens. 



Rostral formula - . 



2 



Average length 35 millims. (3 males and 3 females). 

 General distribution : Hong Kong, Ceylon. 



Nauticaris futilirostris, Sp. Bate Plate II., fig. 8. 



Nauticaris futilirostris, Sp. Bate, '"Challenger" Macrura,' p. 606, 188S. 

 Locality: Galle Harbour (Station XXXVI.), 4 specimens taken in the tow-net. 

 Average length 1 1 millims. 



These specimens agree with Spence Bate's description ; the posterior rostral tooth 

 is slightly more remote from the others than in Bate's figure. 

 General distribution : Off Japan, Ceylon. 



Latreutes, Stimpson, 1860. 



Latreutes ceylonensis, n. sp. Plate II., fig. 7. 



Locality : Cheval Paar (Station LIIL), 1 specimen, 8 millims. long. 



The latero-anterior edge of the carapace is furnished with 4 spines at each side. 

 There is a deep rostrum, almost equal in length to the carapace. The carapace and 

 rostrum together ecpial half the length of the body. The rostrum dips slightly 

 downwards and bears dorsally two prominent teeth above the eyes and a tooth of 

 equal size slightly behind the pointed anterior extremity. In addition to these there 

 are about a dozen smaller teeth on the dorsal side which are only detected under a 

 microscope. The under side of the rostrum is smooth. Each antennular peduncle is 

 short, the proximal joint being as long as the sum of the other two. Each antennule 

 has two flagella which reach to the end of the rostrum, and are slightly longer than 

 the peduncle. The inner flagellum is slightly thicker and shorter than the outer. 

 The antennal peduncles are slightly longer than those of the antennules. The 

 antennal scale is large and broad, and extends slightly beyond the rostrum. Each 

 scale is furnished with half-a-dozen small spines along its outer border. The antenna! 

 flagella are missing. 



The first two pairs of thoracic legs are chelate. The 2nd pair are longer than the 

 1st pair and have the wrist 3-jointed. The remaining three pairs of legs are more 

 strongly made, the meros and carpos being very broad. The dactylos terminates in 

 two very robust spines. 



M 



