260 COLE 



LECYTHORHYNCHUS MARGINATUS sp. nov. 

 Plate XI, figs. 1-2 ; plate xv, figs. i-8. 



Type.— $ , University of California, No. 19,501, San Pedro Point, 

 California; $, University of California, No. 19,502, Dillon's Beach, 

 California. 



Trunk rather stout, second segment broadest ; sutures well defined ; 

 lateral processes squarish, shorter than breadth of trunk segment ; the 

 first pair projecting forward at an angle of about 45°, the second at a lesser 

 angle, third pair projecting somewhat backward, and fourth pair still more 

 so. There is in some cases an indication of a slight chitinous ridge on 

 the mid-dorsal line of the lateral processes. 



Caudal segment comparatively long, about equal to second joint of palp, 

 nearly vertical, subconical, with a small nodular projection on the an- 

 terior side at the apex ; anal opening just posterior to this projection. 



Eye tubercle small, pointed, placed rather nearer to the bases of the 

 chelifori than to the posterior border of the segment. Eyes dark, com- 

 paratively large, crowded. 



Proboscis nearly as long as trunk, projecting obliquely downward, sub- 

 cylindrical or elliptical, but constricted in the middle third, thus appearing 

 somewhat swollen both behind and ahead of the middle; tapering 

 gradually in the distal fourth to the rounded extremity. 



Chelifori short and rudimentary, thumb-like, simple, parallel or nearly so. 



Palpi arising nearly lateral to the chelifori, overreaching the proboscis 

 by about half its length. Nine-jointed: J.i short, square; J. 2 three or 

 four times as long;7*.3 short again like/.i, lying at middle of proboscis; 

 y.4 equal to j.2 ; jj.c^, 6, 7, 8, and 9 all short and rounded, altogether 

 about equal in length to the two preceding joints; 7.5 slightly projecting. 

 The palpi usually make a zigzag line due to a sharp bending downward 

 at the third joint and a bend forward again at the fifth. There are a few 

 small spines on the palpi, especially on the fifth and succeeding joints. 



Ovigera somewhat different in structure as well as in size in the two 

 sexes. In the male they are about equal in length, when straightened out, 

 to the length of the whole animal. First joint comparatively short and 

 broad; J. 2 about twice as long, more slender; third as long as first, 

 slender like second ; fourth and fifth about equal to second ; sixth shorter; 

 seventh small, rounded, armed with a group of small backwardly pointing 

 spines; jJ.B,, 9, and 10 successively smaller and in line, buty'.S proceeds 

 from the side of/. 7, thus forming a sharp angle at this place. These joints 

 also have a few very small spines. The appendage as a whole is sigmoid- 



