384 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [40] 



gives off a sharp carina, running downward and backward toward the in- 

 ferior margin, and then continues on in a nearly straight line across the 

 branchial region to near the posterior margin. The eyes are much 

 smaller than in Pasiphae, and are borne on the outer edge of the tip of 

 a vertically flattened stalk, which is rather broader than the eye and 

 projects in a more or less conspicuous terminal process just inside of the 

 cornea. The antennulse, antennae, second gnathopods, perseopods, and 

 appendages of the pleon are essentially as iu Pasiphae, but the oral ap- 

 pendages and the number of the branchias are essentially different. 



The mandibles (Plate VI, Fig. 2) bear very smaU and slender palpi, 

 composed of two approximately equal segments, while in other respects 

 they are almost exactly as in Pasiphae. The proximal lobe of the pro- 

 toguath of the first maxilla (Fig. 3) is well armed with spines and setse, 

 and is not very much smaller than the distal, which is much shorter 

 along the mesial edge than in Pasiphae; the endognath is well developed, 

 projects much in front of the protognath, has the inner edge emargi- 

 nate, and is armed with long setse. The endopod of the maxilliped (Fig. 

 5) is nearly as in Pasiphae, but the epipod is well developed, with 

 free and approximately equal anterior and posterior lobes. The first 

 gnathopod (Fig. 6) bears a rudimentary, probably epipodal, appendage, 

 and the second gnathopod a rudimentary epipod, and at its base two 

 arthro branchiae. Except in the characters above described, the oral 

 appendages are essentially as in Pasiphae. 



In structure the branchiae are essentially as in Pasiphae) but there are 

 six arthrobranchiae each side instead of three, that is one each at the 

 bases of the four anterior peraeopods besides the two just mentioned, so 

 that the branchial formula is: 



Somites. 



vn. vm. 



IX. 



X. 



XI. 



Xn. Xni. XIV. Total. 



Epipods i 1 



Podobranchise i 



Artbiobianchi88 



PleurobranchiaB 



(3) 



11+ (3) 



While in Pasiphae tarda and pinceps the branchial formula is — 



Somitea. 



vn. vm. IX. X. xi. xn. xm. xiv. Total, 



Epipods 



rodobranchisB.. 

 Arthrobranchiae 

 PleurobranchiaB 



(0) 



8+(0) 



Parapasiphae sulcatifrons, sp. nov. 



(Plate V, Fig. 4 ; Plate VI, Fiys. 1-7.) 



Female. — The carapax is high back of the middle but vertically con- 

 tracted in front, as in the species of Pasiphae, with the dorsal carina ex- 

 tending the whole length and rising iuto a high crest in front, but the 



