94 DR. W. T. CALMAN ON A 



The blind marine cavern icolons species Munidopsis polymorpha, which I have discussed 

 elsewhere *, belongs to a somewhat different category as regards habitat. 



According to Barrois f , the only Decapod Crustacea recorded from the Sea of Galilee 

 are the Crab Telphusa fluviatilis (or more correctly, according to Miss Rathbun, 

 Potamon potarnios) and the Atyid Hemicaridina (= Atyaephyra) desmarestii. 



Family Palj;monidji. 

 Typhlocaris, gen. nov. 



Rostrum very short, flattened, without teeth. Carapace without antennal, hepatic, 

 or other spines, but with a longitudinal suture-line on each side. Outer flagellum of 

 antennule with a minute vestige of an inner branch. Mandible without a palp. Maxilla 

 with the distal endite undivided. Third maxilliped slender. Second perseopods much 

 larger than the first. 



Type species, T. galilea, sp. n. 



The affinities and systematic place of the genus are discussed below. 



Typhlocaris galilea, sp. n. (Plate 19. figs. 1-13.) 



Description of Male. — The carapace is smooth, its surface beset with very minute, 

 widely-scattered setae. In front it is produced in a minute triangular rostrum, flattened 

 and without any median keel, not extending beyond half the length of the ocular 

 peduncles. The orbital notch is defined below by a very slight convexity, but there are 

 no antennal, hepatic, or other teeth on the antero-lateral margin, and the antero-lateral 

 corner is broadly rounded. On each side the carapace is traversed by a longitudinal 

 suture-line or fine groove which runs, nearly straight, from a point opposite the base of 

 the antenna to the posterior margin. This suture has very nearly the position of the 

 linea thalassinica of certain Thalassinidea and of a similar line found in certain Penaeidae 

 (Parapenceus, Parapenceopsis), but I cannot find mention of any comparable structure 

 in the Caridea. Towards its lower edge the carapace becomes membranous. 



The abdomen has little of the " humped " form supposed to be characteristic of the 

 Caridea (Eukyphotes of Boas), but this feature is ill-defined in many other Caridea. 

 The pleural plates of the second somite are comparatively little expanded. The abdomen 

 is about the same width throughout its length, the sixth somite being broad and 

 depressed, hardly longer than the preceding somite, and much broader than long. The 

 telson (fig. 3) is longer by one-half than the sixth somite, and has a broadly triangular or 

 rounded tip, extending well beyond a pair of stout subapical spines and fringed with 

 spinules and setse ; there are two pairs of spinules on the upper surface. 



The ocular peduncles (fig. 4) have the form of flattened scales, lying horizontally 

 and nearly touching each other in the middle line. On the upper surface of each are a 



* Ann. Mag. Nat. Hist. (7) xiv. p. 213 (1904). 



t Tb. Barrois, " Liste des Decapodes fluviatilea recueillis en Syrie," Rev. Biol. Nord France, v. pp. 125-134 

 (1893) ; also "Contribution a l'etude de quelques lacs de Syrie : IV. Lac de Tiberiade," op. cit. vi. pp. 250-293 (1894). 



