572 MRS, E. W. SEXTON ON THE - 



a female of L. bispinosus (p. 585) : Gi^ube's specimens proved on 

 examination to be pectinatus (see p. 577). 



Sars has given an excellent description and figures of this 

 species, (40) pi. 197, to which it is only necessary to add one or 

 two details. 



Superior Antenna, tlagellum furnished with very long sensory 

 filaments. 



Fi7^st Gnathopod (fig. 13). — The palm is oblique, serrate, with 

 its limit defined, as in pectinatus, by a large sensory spine inset 

 on the under side. The tip of the finger reaches to this spine. 

 The palm carries a small strong spine on the outer side, close to 

 the insertion of the finger. 



Second Gnathopod.— The finger (fig. 1 4) is exactly as in the 

 type species, cf. PI. XYII. figs.'' 17 & 18. 



Hinder Perceopods. — Sars figures the finger of perseopod 5 only 

 as bidentate, but the finger in all three hinder peraeopods is of 

 the same structure (see fig. 15). Spence Bate in his original 

 description notes it for the 3rd perseopod, (1) p. 169 ; and Malm, 

 (27) p. 546, describes and figures it for all three. 



tjropod 3 (fig. 16). — The outer ramus is 2-jointed, as in all the 

 other species of the genus, but the 2nd joint is exceedingly small 

 and very difiicult to observe except from the dorsal view, owing 

 to the apex of the 1st joint being produced beneath it. 



Leptocheirus guttatus Grube. (Plate XYIII. figs. 1-9.) 



1864. Protomedeia guttata Grube (23) p. 63. 



1866. „ „ „ (24) p. 408, pi. x. fig. 3 



1885. „ „ Carus (6) p. 417. 



1886. Ptilocheirus trianstattis Chevreux (9) p. xl. 



1887. „ „ „ (10) p. 3. 



1887. „ „ „ (ll)p.310,pl.v.figs. 3&4, 



and fig. 4 in the text, p. 578. 



1888. Leptocheirus guttatus Stebbing (42) p. 366. 

 1898. „ „ Chevreux (15) p. 481. 

 1900. „ „ „ (16) p. 92. 

 1906. „ guttatus Stebbing (44) p. 629. 



,, tricristatus Stebbing (44) p. 629. 



1906. „ guttattis Xorman &:■ Scott (36) p. 85, pi. ix. 



figs. 4-7. 



1907. „ guttatus Norman (37) p. 369. 

 1910. ,, tricristatus Chevreux (18) p. 2. 



The specimens examined were : — 



1 $ , Grube's type specimen, 5*5 mm. long, from Breslau 

 Museum. 



3 $ L. tricristatus, taken by Monsieur Chevreux in the Bay of 

 Quiberon, the largest measuring 4*5 mm. 



9 taken by Canon Noniian at Falmouth, the largest 5 

 measuring 6*25 mm. 



The type specimen from Bi'eslau has Dr. Grube's original label 



