BLIND PRAWN FROM THE SEA OF GALILEE. 97 



that of some Penseidae and with the linea thalassinica, it may indicate that Typhlocaris 

 has been derived from some very ancient and primitive Caridean type. The resemblance 

 to the Thalassinidea in this character adds another to the indications already existing 

 (phyllobranchiae, appendix interna, larval development) that that group has some affinity 

 with the Caridea. 



As indicated above, the only blind subterranean Palaemonidse known are two species 

 referred to Palcemonetes occurring in Texas and Cuba respectively. Both have been 

 described only in a very summary fashion, but so far as their characters are known they 

 indicate no special affinity with the present species *. 



According to information supplied by the collector, the species would appear to be 

 very rare. Repeated searches in the same locality over a period of two years only 

 resulted in the discovery of three specimens, one of which was afterwards lost by accident. 

 The other two specimens, which are males, are now in the British Museum, and form 

 the types of the species. 



EXPLANATION OF PLATE 19. 



Fig. 1. Typhlocaris galilea, g. et sp. n. Male, from the side, x ?. 



2. „ „ „ Head, from above. 



3. ,. „ ,, Telson and uropod, from above. 



4. „ „ „ Ocular peduncle: a, from above; b, from the side. 



5. „ „ „ Portion of outer flagellum of antennule, showing the secondary 



appendage. 



6. „ ., ., Mandible. 



7. „ „ ,, Maxilla. 



8. „ ,, „ First maxilliped. 



9. ,, „ „ Second maxilliped (anterior surface), showing vestigial podo- 



branchial lobe on the epipodite. 



10. ,, ,, ,, Third maxilliped. 



11. ,, ,, „ Second leg. 



12. ,, „ .. Pleopod of first pair (posterior surface), showing patch of 



modified spines on protopodite. 



13. „ „ ,, Spines from protopodite of pleopod. 



* Since this was written I have been enabled, by the courtesy of Miss M. J. Rathbun and of the authorities of 

 the United States National Museum, to examine specimens of these two species. They differ widely from the 

 species here described. 



SECOND SERIES. — ZOOLOGY, VOL. XI. 



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