41 

 Fam. : Callianassidae- 



1900. Callianassidae, Stebbing, 2»>larine Investigations South 



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



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



rura and Anomala, pp. 151, 197. 



Gen. : Callianassa, Leach. 



In connection with the description of Callianassa kraussi (South 

 African Crustacea^; p. 38, 1900) notic|e\was taken of numeirouS' 

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

 that Say's Callianassa major was in 1866 transferred by 

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

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

 almost styliform." At the same date Stimpson instituted another 

 new genus, Glypturus, with " caudal lamellse deeply sculptured;' 

 for the species G- acanthochirus, which he distinguishes fromi 

 Callianassa grandimana Gibbes, only by details of the cheliped. 

 To these two species of Glypturus Miss Rathbun in 1900 adds a 

 third G. branneri. 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. amho'mencis, de Man. 



In a paper on the decapod crustacea o^ West Africa, also m 

 1900, Miss Rathbun keeps distinct Callianassa hirncrana. White, 

 from C. diadnnata, Orbrann. tbe former being described as having- 

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

 may be doubted whether this minute distinction in these large 

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

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

 tnrncrana is said to be at tinres prodigiously numerous, so that 

 there may well be opportimity for small individual variations. 



Callianassa rotundicaudata, n. sp. 

 Plate 8. 



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

 bod)-, the front being feebly advanced between and at each side 

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

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

 and together are 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 

 setae near the middle. The sixth segment is fringed laterally with 

 setules, and has two rows of setai on the hind margin." The 



