REPORT ON THE CRUSTACEA MACRURA. 739 



Acanthcphyra sica, n. sp. (PI. CXXV. fig. 1). 



Dorsal surface of the pleon slightly arched, the four posterior somites terminating in 

 small dorsal teeth, of which the anterior is occasionally slightly the largest. 



Carapace smooth, slightly carinated dorsally, and produced anteriorly to a rostrum 

 that is equal in length to the carapace, and armed on the upper surface with nine or ten 

 widely separated small teeth, the posterior being closer to one another than the others, 

 and with five on the lower corresponding with the anterior five on the dorsal surface. 



Ophthalniopoda pear-shaped and not very large. 



First pair of antennas having the first joint deeply excavated for the reception of 

 the ophthalniopoda, and having a thick stylocerite that is sharply pointed, and about as 

 long as the ophthalmopod ; the two following joints are short, cylindrical, and carry two 

 flagella that are a little longer than the rostrum. 



Second pair carrying a slender flagellum that is as long as the animal, and a rigid 

 scaphocerite that gradually narrows to the extremity, where it terminates in a sharp 

 point ; at its base, standing on the margin of the second joint, are two short but strong 

 and sharp teeth, one above the scaphocerite, and the other below it. 



Mandible broad, and having the teeth on the incisive margin regularly serrate, 

 the central one being the most prominent. The molar process is triangulate, and the 

 synaphipod has the terminal joint short, broad, and tipped with hairs. 



There is nothing very remarkable in the form of the gnathopoda or pereiopoda besides 

 their generic features. 



Posterior pair of pleopoda having the branches narrow, pointed, and scarcely as long- 

 as the telson ; outer branch longer than the inner, and having a well-defined broad 

 ridge, the outer side terminating in a small tooth corresponding with the diaeresis. 



Telson long and narrow, longitudinally channelled on the dorsal surface, and armed 

 at the lateral margins with nine or ten short articulating spines. 



Habitat— Station 168, July 8, 1874; lat. 40° 28' S., long. 177° 43' E.; off New 

 Zealand; depth, 1100 fathoms; bottom, blue mud; bottom temperature, 37° - 2. Four 

 specimens ; one male, three females. Trawled. 



Station 40, April 28, 1873; lat. 34° 51' N., long. 68° 30' W.; north-west of 

 Bermuda ; depth, 2675 fathoms ; bottom, blue mud. One specimen. Dredged. 



