BORRADAILE— PEN.EIDEA. 259 



Subfamily Sicyoninee. 

 Genus SICYONIA, H. M.-E. 1830. 



7. Sicyonia lancifer (Olivier), 1811. 

 Bate, 'Challenger' Macrura, p. 297, pi. 43. fig. 4. 



Specimens were taken in various depths down to 34 fathoms ia South Nilandu, 

 Mulaku and Suvadiva Atolls, all in the Maldives. 



8. Sicyonia carinata (Olivier), 1811. 



H.Milne-Edwards, Ann. Sci. Nat. i. xis. p. 339, pi. 9. figs. 1-8; Bate, 'Challenger' Macrura, 

 p. 29, pi. 43. fig. 1. 



The distribution of this species is interesting. Milne-Edwards, Dana, and Bate 

 describe it from the Western Atlantic, wliile Pearson has recently reported it from 

 Ceylon (Pearl Fisheries Report). My specimens, which were taken at HaddumatL 

 Atoll, Maldive Islands, agree with Milne-Edwards's figure rather than with Bate's in 

 the shape of the teeth of the keel on the carapace, which project less upwards than 

 in Bate's figure. 



Genus SICYONELLA, nov. 

 The collection contains many specimens of a new prawn which must be placed in the 

 subfamily Sicyoninee on account of its having (1) no exopodite on any thoracic leg 

 behind the first maxilliped, (2) no podobrauchs, (3) arthrobranchs in a single series, 



(4) no leaf-like appendage on the basal joint of the antennule, and perhaps because 



(5) the rostrum is very short. At the same time it differs widely from Sicyonia in the 

 following features : — (6) the carapace is not unusually hard, (7) the crest of the rostrum 

 is not continued along the back, (8) the eye-stalks are very long, (9) the flagella of the 

 antennules are long and slender, (10) the scales of the antennae do not narrow rapidly to 

 the end, which is broad and bears its spines at the side, (11) the gill-formula consists 

 only of one arthrobranch on each of the limbs from the second maxilliped to the 

 fourth leg inclusive and a pleurobranch on the fifth leg, without mastigobranchs, (12) the 

 abdominal segments are not keeled, and (13) the swimmerets are biramous. I propose 

 accordingly to place the animal in a new genus Sicyonella. 



9. Sicyonella maldivensis, sp. n. (Plate 16. figs. 3, 3a.) 



Diagnosis. — A Sicyonella with the rostrum very short, bearing two teeth above and 

 none below ; the antennal teeth present and placed a little behind the fore edge of the 

 carapace, the branchiostegal tooth present but small ; the third maxilliped very long, 

 tapering, and sparsely set with strong hairs; the first leg shorter than the second and 

 the second shorter than the third ; the fourth and fifth of moilerate length, with the last 

 two joints flattened and fringed with long hairs ; and the telson deeply grooved above 



