41 

 Fam.: Calliaxassidae- 



1900. Calliaiiassidac, Stebbing, Marine Investigations South. 



Africa,, Crustacea, pt. i, p- 38. 



1901. Callianassidae, Alcock, Indian Deep-Sea Crustacea, Mac- 



rura and Anomala, pp. 151, 197- 



Gen. : Callianassa, Leach. 



In connection with ihe description of Calliaiiassa kraiissi (South 

 African Crustacea,, p. 38, 1900) notide^was taken of numerous 

 species of this ;^enus. It nuiy here be worth while to add 

 that Say's Calliaiiassa major was in 1866 transferred by 

 Stinipson to a new genus CaUichirus, chiefly, as it seems, on the 

 ground that the inner branch of the uropods is " very narrow, 

 almost styliform" At the same date Stimpson insitituted another 

 new^ genus, Glyptnnis, with " caudal lamellae deeply sculptured," 

 for the species G- acanthochinis, which he distinguishes from! 

 Calliaiiassa grandimana Gibbes, only by details of the cheliped. 

 To these two species of Glyptnrus Aliss Rathbun in 1900 adds a 

 third. G. hranneri. Recently Mr. Lanchester has described a new 

 Callianassa from the Malay Peninsula as C. secura (Proc. Zool. 

 Soc. London, p. 555, 1902), closely related to C- pachydactyla, A. 

 Milne-Edwards, and C. amhomencis, de Man. 



In a paper on the decapod Crustacea of West .-Vfrica, also \n 

 1900, Miss Rathbun keeps distinct Calliaiiassa fitriicraiia. White, 

 from C. diadciiiafa. Ortn-'ann. ^he former being described as having 

 a three-spined rostrum, the latter one that is five-spined. But it 

 may be doubted whether this minute distinction in these large- 

 forms, exactly agreeing in the large chelipeds and the trilobed tel- 

 son. is suli cient for the maintenance of Dr. Ortmann's species. C. 

 turncrana is said to be at tinges prodigiously numerous, so that 

 there may well be opportunity for small individual variations. 



Callianassa rotundicaudata, n- sp. 

 Plate 8. 



The carapace is about two-sevenths of the total length of the 

 body, the front being feebly advanced between and at each side 

 of the bases of the first antennas; its hind margin is fringed with 

 some setules. The first two segments of the pleon are coalesced, 

 and together arc as long as the carapace, with no trace of pleo- 

 pods; the third segment, which is half as long, carries at each 

 distal corner a tuft of setae, thickened with short, close-set plumo- 

 sity; the two following shorter segments have similar tufts of 

 setjfi near the middle. The sixth segment is fringed laterallv with 

 setules. and has two rows of setae on the hind margin.' The 



