MACHUROUS DECAPODA OF THE SUDANESE RED SEA. 395 



Remarks. This specimen agrees completely with Nobili's careful descrip- 

 tion, and I have nothing further to add to his account. 



Distribution. At present only known from the Red Sea (Nobili). 



Family CALLIAN ASSISE, Bate, 1888. 



Subfamily Upogebiin^e, Borradaile, 1903, p. 512. 



Genus Upogebia, Leach. 



Upogebia (Calliadne) savignyi, Strahl, 1862, p. 1061. 

 U. savignyi, Nobili, 1906 a, p. 98. 



Localities. Station VII. D, 29 specimens, 5-27 mm. Station I. 0, always in 

 pairs, a large ? and small <$ in yellow sponge, 14 specimens. Station V. Gr, 

 one specimen, 9 mm. 



Uncertain. 1 juv„ 5 mm., labelled "Crust, fr. 44." 



Remarks. This species seems to be usually, if not always, associated with 

 sponges. Two specimens were infected by a Rhizocephalan parasite on the 

 under side of the abdomen. 



Upogebia (Upogebia) pseudochelata, n. sp. (PI. 28. figs. 16-22.) 

 Locality. Station VII. C, 1 $ , 6 mm., 1 $ , ovigerous, 12 mm. 

 Description. The rostrum is quite short and does not extend beyond the 

 eyes. In dorsal view it is triangular in shape with an obtusely rounded 

 apex, and its margins are not provided with teeth or spines. The lateral 

 tooth on each side is almost obsolete, but it marks the anterior termination of 

 a strong lateral tuberculated ridge which runs backward on each side to the 

 well-marked cervical groove. This ridge bears about a dozen small tubercles. 

 The central portion of the dorsal surface of the rostrum and carapace is 

 provided with numerous small obscure tubercles arranged irregularly in six 

 rows, more numerous and prominent nearer the rostrum, becoming obsolete 

 or absent towards the cervical groove. Between the tuberculated portion of 

 the carapace and the lateral ridge on each side, and running parallel to the 

 latter, is a linear groove or impression, devoid of tubercles and likewise 

 becoming obsolete as it nears the cervical groove. The rostrum itself is 

 provided with a dense tuft or mass of short setse, and the remaining part of 

 the carapace and the body is adorned with scattered hairs of varying lengths. 

 The antennular peduncle (PI. 28. tig. 17) is shorter than the antennal 

 peduncle, equal in length to the first three joints of the latter, and extending 

 beyond the eye by the whole of the last two joints and the narrow distal 

 portion of the basal joint. The third segment is three times the length of 

 the second. One flagellum is thirteen-jointed and the other ten. The longer 

 flagellum is about one-fifth longer than the peduncle, the shorter flagellum 

 equal to the peduncle in length. 



