("umacea: 1. Vaunthompsoniidae, 1. Vaunthompsonia, 2. Gaussiciima U 



preceding- emargination denticulate, the lower border of carapace for some 

 distance backward dentate. Carapace with median carina, armed in 9, 

 not in d, with close set double row of forward pointing teeth, interrupted 

 for a short space before its continuance to the hind margin. Five pedigerous 

 segments conspicuous, but the !«* in d laterally covered by the 2"^ segment. 

 The strongly produced telsonic segment has its broadly ti-iangular apical 

 margin denticulate. Eyelobe somewhat linguiform, with a pair of little apical 

 teeth; eye dark reddish, with several corneal lenses. Antenna 1, 1^* joint 

 longest, 3d in 9 equal to 2"^ but shorter in 6, flagellum rather long,_ with 

 short 3'^ joint, accessory minute, one-jointed. Antenna 2 of 9 2-jointed, 

 with 2 plumose setae on the 1*** joint, the long-jointed flagellum of 6 not reaching 

 far along the pleon. Apical points of lower lip conspicuous. Fore part 

 of mandible not short, spine-row of 17 spines. First maxilliped with 

 5 branchial leaflets. Third maxilliped with medial margin of the long 

 2>^*i joint serrate, the lateral apex not at all produced. Peraeopod 1 as in 

 V. meridionalis. Peraeopod 2 with 3'i joint distinct (Caiman), wanting (Sars), 

 7<h joint longer than the 4*1^ or 5^*1. which are subequal. Pleopods of <3 

 with broad peduncle, armed on medial margin with 5 coupling spines and 

 4 plumose setae, branches subequal, a little shorter than peduncle, 1^* joint 

 of exopod without setae, which are numerous on its 2"*^ joint and on the 

 1 -jointed endopod. Uropods rather slender, peduncle as long as telsonic segment, 

 with a dozen spines on medial margin, endopod with ^""^ joint two thirds of 

 length of the l^\ spines on medial margin of 1«* 9, of 2"^, 3 or 4, exopod as long 

 as peduncle, four-fifths of endopod, with slender spines on both margins 

 and a very long apical spine. L. 9 6 mm, d 5 mm. 



British Isles, W. coast of France, Mediterranean. W. Indies? Surface (,5) to 36 m. 



4. V. arabica Calm. 1907 Vauntompsonia a., Caiman in: Tr. zool. Soc. London, 

 V.I81 p. 2, 29 t. 7 f. 20-24. 



d. Very near to V. cristata, but with medio-dorsal line of carapace 

 arched instead of straight, and the pleon stouter, 1^* antenna with shorter 

 and stouter peduncle, the third joint longer than the second, third maxilliped 

 with medial margin of 2^^^ joint not serrate, peraeopod 1 reaching end of 

 carapace only with end of the sixth joint, peraeopod 2 with 7*^ joint less 

 slender, and the following peraeopods relatively shorter. Colour variable, 

 patches usually on carapace, dendritic spots sometimes on sides of pleon. 

 L. 3"1 mm. 



Suez Canal; Aden. 



2. Gen. Gaussicuma Zimmer 



1907 Gaussicuma (Sp. un.: G. vanhoeffeni), Zimmer in: Zool. Auz., u 31 p. 368 | 

 1912 G., T. Stebbing in: Ann. S. Afr. Mus., v. 10 p. 134. 



General form slender. Pseudorostral lobes not meeting in front of 

 the apically downbent eyeless eyelobe. Pedigerous segments each with a 

 ventral tooth. Telsonic segment strongly produced between bases of uropods. 

 Maxilliped 3 with 2nd joj^t long and distally very much produced. 



1 species. 



1. G. vanhoeffeni Zimmer 1907 G. v., Zimmer in: Zool. Anz., u31 j). 368. 



Pseudorostral lobes with apices separated from the obtuse antero-lateral 

 corners by a deep incision. Carapace with creases on hinder part of back 



