REPORT ON THE STOMATOPODA. 31 



median carina, whicli is continued forwards on to the rostrum, and is interrupted behind 

 by the strongly marked cervical sutures, posterior to which the median carina is 

 continued to the posterior edge of the carapace, where there is no median tubercle. There 

 are two longitudinal carinse on each lateral portion of the carapace, a submarginal one, 

 which lies near the base of the antero-lateral spine, along nearly the whole length of the 

 carapace parallel to and near the thickened lateral margin, and a second or internal one, 

 which lies about midway between the first and the gastric suture, and comes to an end 

 in front of the transverse cervical suture. The thickened ridge which borders the lateral 

 margin of the carapace and the rounded postero-lateral lobe bends inwards around the 

 postei-ior margin of the latter, and running forwards on the dorsal surface of the carapace, 

 forms a submedian carinse parallel to and just outside the cardiac suture, and extend- 

 ing forwards as far as the transverse cervical suture. The posterior edge of the carapace, 

 which does not completely cover the first thoracic somite, is nearly transverse. 



The second, third, fourth, and fifth thoracic somites have each four longitudinal 

 dorsal carinse, the submedian on the second being very short and concave towards the 

 middle line ; the first five abdominal somites have each six longitudinal carinse besides 

 the marginal ones, and the sixth somite six in all, which all end posteriorly in acute 

 spines, while there are no spines on the submedians of the thoracic and first five 

 abdominal somites, nor on the first lateral carinse of the thoracic and first abdominal. 



The marginals and submarginals of the first five abdominal somites, and the inter- 

 mediates of all except the first abdominal, end in spines. The submedian dorsal carina} 

 are parallel in the first eight exposed somites, divergent posteriorly in the fifth abdominal 

 somite, and convergent posteriorly in the sixth abdominal somite. While the somites 

 increase slightly in width from in front backwards the space included between the second 

 pair of carinse is of uniform width from the second thoracic to the fifth abdominal somite, 

 and these carinse form the prominent parallel ridges running along the whole length of 

 the abdomen, although the carina itself is interrupted by a notch near the anterior edge 

 of each abdominal somite except the sixth. The second, third, fourth, and fifth abdominal 

 somites have each a median dorsal double tubercle. The lateral processes of the thoracic 

 somites are much like those of Squilla mantis. The lateral margin of the second is 

 prolonged with a long straight acute lobe, while the thii'd and fourth are obliquely 

 truncated, the tliird more obliquely than the fourth, and end behind in acute points. 

 The fifth is furnished at its autero-lateral angle with a small subacute process or tooth. 

 The telson ends in six marginal spines, of which the submedians are acute and triangular, 

 the intermediates very long, curved, slender, and acute, and about twice as long as the 

 submedians, and the laterals verj- short, about half the length of the submedians, rounded 

 and subacute. The tips of the long median spines are in the same transverse hue with 

 the tips of the submedians, while their bases are in the same transverse line with the 

 base of the unpaired median spine. There is a single rounded dentation between the 



