NINE SPECIES OF SQUILLID^. 3 



Rostrum parabolic, broader than long, with a longitudinal median carina. 

 Eyes small, about the same size and apparently of the same form as in S. chlorida. 

 Brooks ; their peduncles are broader than the cornese, bulging on both sides, but 

 especially on the inner side near the base ; their cornetie distinctly bilobed, 

 each lobe almost hemispherical : anterior margin of dorsal arc of optic ring pro- 

 duced into two squarish diverging processes, somewhat resembling the upper half 

 of a St. Andrew's cross : dorsal arc with upper margin triangular or pointed, semi- 

 oval, the ventral surface roof-shaped, the ridge terminating posteriorly in a small 

 tubercle — the remains of the defensive spine of the nauplius eye, of which no trace 

 is to be detected. The greater diameter of the cornea is contained 7^ times in the 

 length of the antenna! scale. 



Processes of the antennulary ring simple and lamellar, with arched free margin. 

 Median longitudinal ridge of anterior lobe of carapace forked midway between its 

 anterior end and the distinct dorsal tubercle : the spines of the antero-lateral angles 

 barely reach the level of the postfrontal depression. 



Great raptorial limbs with the outer margin of the dactylopodite faintly 

 sinuous, and the inner margin armed with six teeth, which are separate to their 

 bases ; the dorsal crest of the carpopodite entire ; and the outer and lower apex of 

 the meropodite rounded. 



Carapace subangulatc at the junction of its lateral and postero-lateral margins. 



The lobes of the outer ends of the fifth thoracic tergum are small and subciiual, 

 acute, the anterior curved forwards, but placed below the level of the posterior : 

 those of the sixth tergum are large, squarish, and divergent, the posterior the 

 broader and with the angles rounded off : those of the seventh tergum are very un- 

 equal, the anterior being small, acute, and triangular, the posterior being of the 

 same size and form as the corresponding one in the preceding somite; anterior 

 angle of the eighth about half as large again, but of much the same form as the 

 anterior in the preceding somite. Interrupted dorsal cariniform tubercles on the 

 second to the fifth abdominal tcrga. 



Of the abdominal carimc the third to the sixth lateral, the third or fourth to 

 the sixth sublateral, and the fourth to the sixth submedian terminate in a spine. 



Telson distinctly longer than broad, with exceedingly acute marginal spines : 

 six denticles between the submedian, arranged three on each side of the median 

 fissure, which is nearly twice the length of the fissures that separate the denticles 

 from one another : seven rather larger denticles between the submedian and sub- 

 lateral spine of each side, the line of the denticles concave : one denticle between 

 the sublateral and lateral spines of each side : median carina scarcely interrupted. 



Stridulating organ well developed. 



No. -g^* One male and five females from Hongkong, presented by Mr. Denny. 



