130 MESSES. NOEMAN AND STEBBIN& ON THE 



Antennae : upper (fig. ii. a.s) with joints of peduncle subequal in length ; flagellum 

 5_6.jointecl, equal in length to half the peduncle ; lower (fig. ii. a.i) strong, subpedi- 

 form ; flagellum reduced to a single articulation, which, however, is flattened, nearly as 

 long as last joint of peduncle, and furnished along the side with a dense pencil of 

 hairs. 



Feet: all very like in form to the same members of C. hrachiata; but the palm of 

 the first gnathopods (ii. gn^) is furnished with a small tubercular process at the base. 



Length 13 millim. 



Habitat. Coast of Algeria (iwcrts) ; Adriatic (//e^Z^r !) ; Guernsey (^.Jf. iV. !). 



This species is at once distinguished from all the others known to us by the 

 peculiar character of the flagellum of the lower antennae, which consists of a single 

 flattened joint, strongly ciliated along the edge. 



We have had the opportunity of comparing Adriatic specimens kindly sent to us by 

 Professor Heller, with the examples collected in Guernsey by A. M. N., and which 

 were described by Bate and Westwood in their work. 



Bate and Westwood have doubtfully referred the OlisJca penicillata of Risso (' Crus- 

 taces de Nice,' 181G, p. 137, pi. iii. fig. 10, and ' Hist. Nat. Europ. Merid.' v. p. 113) to 

 this species ; but Olisha, we think, cannot be synonymous with Anthura. The descrip- 

 tion of the telson (" sa queue est triangulaire, et termince par deux long JiJets soi/eux et 

 penicUlcs ") does not at all agree. Risso's genus must remain in obscurity until some- 

 thing like it shall have been rediscovered in the neighbourhood of Nice. 



Another Antlnira {A. fiUformis) has been described and figured by Lucas (' Anim. 

 Artie, de I'Algerie,' p. 63, pi. v. fig. 8) from the Algerian coast. It is characterized 

 thus: — "A. fusco-fcrnKjwea; capiie ^wrt'O, ufniiqzie sidcato, antice acuto ; segmentis 

 thoracis elongatis, august is, frofunde sidcatis, fortiter pimctatis ; ahdomine elongato, 

 segmento primo quinqttcscisstirato, secnndo avgusto, fortiter carinato.'' The telson is 

 linguiform and bears a central keel, the uropods are represented as very like in form 

 to those of A. nigro-punctata, and the lower antennae have a flagellum of about six 

 articulations. It would seem to be a well-marked species. 



Grube has described another Mediterranean Anthura, found at Cherso, under the 

 name of ^. lanrentiaiia {'■'Em Ausflug nach Triest und den Quarners,' 1861, p. 138). 

 In ' Die Insel Lussin und ihre Meeresfauna,' 1864, p. 76, the same author has recorded 

 A. gracilis from the Adriatic; but since he specially refers to M.-Edwards's figure, we 

 may conclude tliat the species named by him is not A. gracilis. On the other hand, 

 his description of A. lanrentiana agrees very fairly with that of the true A. gracilis, 

 except the important character " corpus subteres .... dorso hatnl sculpdo.'' 



