52 



posed thoracic segments. In this last character our species 

 resembles S. 7iepa. 



Squilla subfasciata, spec. nov. 



Species name to indicate its affinity with S.fasciata. 



Carapace smooth, with a faint lateral carina on each side, 

 widening posteriorly ; very convex in the middle, with the sulci 

 deep, and produced to the posterior margin ; antero-lateral 

 angles armed with a spine; posterolateral angles broadly 

 rounded; posterior margin strongly arched. Eostral plate 

 truncatedly trigonous, a little longer than broad, reaching to 

 the base o£ the ophthalmic segment. 



The exposed thoracic and the first five abdominal segments 

 have their medio-dorsal surfaces convex, smooth, but are faintly 

 marked with a lateral carina on each side, whilst the abdominal 

 segments have a stronger carina on each side inferior to the 

 other. The postero -lateral angle and the inferior carinsB of 

 each abdominal segment end in spinules. On the sixth 

 abdominal segment the submedian as well as the lateral carinsa 

 are present and end in spines. 



The telson is much broader than long, and is ornamented 

 with a median acute crest, spinous at the end, and about six 

 ridges on each side. The margin is prolonged into six acute 

 teeth, between which are a number of smaller spiniform teeth. 



The basal prolongation of the uropoda is armed on its inner 

 edge with narrow and acute spines gradually increasing in 

 length ; the inner of its two elongated terminal spines is the 

 longer, and armed with an acute tooth on its outer margin. 



The dactyli of the raptorial limbs are six-spined, gradually 

 increasing in size. The anterior margin of the penultimate 

 joint is pectinated throughout its length, and carries on the 

 inferior face a few mobile spines. The appendages of the three 

 post-thoracic limbs are linear-spathulate, flat. The first ex- 

 posed thoracic segment is not laterally produced, but is armed 

 with a spinule on each side ; the following segments are suc- 

 cessively broader, scarcely laterally produced, and rounded on 

 the sides. 



Length of body, two and one-fourth inches ; greatest 

 breadth, one-fourth inch. Colour in spirit, pale straw. 



Locality. — St. Vincent's Grulf {S. Aust. 3£us., one example). 



S. fasciata has much resemblance to Chloridella microph- 

 fJudma ; and differs from S. fasciata only in its pectinated 

 penultimate joint of the raptorial limbs, in the arched 

 posterior margin of the carapace, and in the truncated apex 

 of the rostral plate. 



