1912.] S. Kemp & R. B. S.,SEWEiyL : Notes on Decapoda, III. 19 



seems to be longer in A. rostridentata than in A. foliacea. In the 

 former species it reaches exactly to the apex of the inner uropod, 

 the slightly greater length shown in the ' Investigator ' Illustra- 

 tions being due in all probability to a perspective effect. 



We have been unable to find any distinctions between the 

 two species in regard to the form of the oral appendages or of 

 the thelycum and petasma. 



Bouvier {loc. cit., p. 53) states that the branchial formula 

 of Aristaeomorpha is the same as that of Benthesicymus ; but 

 Alcock notes the presence of two arthrobranchiae at the base of 

 the penultimate pair of peraeopods, which, according to Bouvier's 

 account (/. c, p. 17), do not occur in the latter genus. Examination 

 of the specimens in the Indian Museum shows that these bran- 

 chiae occur both in the Indo-Pacific and in the Mediterranean 

 species of Aristaeomorpha. 



In the Indian Museum no specimen of Aristaeomorpha can be 

 found bearing the name A. giglioUana, but the example figured by 

 Wood-Mason under this name is undoubtedly that which is pre- 

 served in the collection with the label " 'Washington,' St. xiv, 

 i3-viii-8i ; 39° 01' 28" N., 9° 30' 19" E. 772 metres. Enrico 

 H. Giglioli." It is evident that Wood-Mason figured this speci- 

 men from the Mediterranean for comparison with A . rostridentata, 

 but his reasons for assigning it a new specific name remain 

 obscure, for he never published any description. The measure- 

 ments of the specimen, a female 170 mm. in length, are shown 

 on p. 18 ; it is unquestionably an example of A. foliacea. 



Family SERGESTIDAE 



Sergestes bisulcatus, Wood-Mason, 



Sergestes hisulcatus, Alcock, 1901, p. 49; ///. Zool. Invest., Crust., 

 pi. 1, figs. I, la-b, and Stebbing, 1905, p. 87, pi. xxiv A. 



A small female, about 46 mm. in length, is referred to this 

 species. It was obtained at St. 388 and was almost certainly 

 caught during the ascent of the trawl. 



5. bisulcatiis is very closely allied to the Atlantic S. robustus. 

 Smith, but is readily distinguished by the sharply cut cervical 

 groove, which is specially distinct on the dorsum of the carapace. 



Tribe Caridea* 



Family PASIPHAEIDAE. 



Sympasiphaea anncctens, Alcock. 



Sympasiphaea annectens, Alcock, 1901, p. 63, and III. Zool. Invest., 

 Crust., pi. Hi, fig. 7. 



A large female, 91 mm. in length, was obtained at St. 388. 

 The rostrum is more strongly elevated at the apex than 

 in the type and the epipod at the base of the second maxilliped, 



