500 MEMOIRS OF THE UNIVERSITY OP CALIFORNIA 



muscle, and the distribution of the fine points on its surface suggests the possession of circular 

 contractile fibers, the protractor muscles. Its surface is evei-ywhere covered, except at the tip, 

 with minute pointed elevations, giving to it a characteristic hispid appearance, hence the specific 

 name hispida. Upon the stimulus of contact the tentacle was contracted, growing stouter and 

 more capitate as a result. 



The ocellus is of the compound type, and is unique among the varied ocelli of this genus in 

 that it consists of a row of lenses applied to one face of the pigmented sphere, with radial 

 streamers. The lenses lie on the left side of the intereingular part of the sulcxis immediately 

 against its margin. Viewed from the left, as in our figure (pi. 12, fig. 127), tliey appear as 

 flattened spheres whose diameter is slightly greater than that of the tentacle. When viewed 

 more from the right it appears that their diameter in the transverse direction is nearly twice that 

 in the vertical, that is, they are flattened ellipsoids. There are six of these lenses, subequal with 

 the terminal ones, somewhat smaller, and all subject to irregularities in contour. 



The pigment body is spheroidal, flattened on its right face where the lenses lie in contact 

 with it. Its diameter is about 0.3 transdiameter of the body. At equidistant points on its 

 circumference it sends off into the surrounding cytoplasm feathery tapering streamers of its 

 substance, the longest of which are about equal to its radius in length. Its color is a browni.sh 

 black with brownish core and streamers shading into brick red. It is noteworthy that the axis 

 of the ocellus as a whole is here less definitely directed anteriorly than in the simple type of 

 ocellus. 



The periphery of the body after prolonged confinement under the cover glass presents a 

 characteristically mottled appearance due to a reticulum of pale glaucous green cytoplasm con- 

 taining in its meshes a salmon-pink fluid, tinged with aniline yellow, with a resulting pale cream 

 tone to the body as a whole which lias the usual glassy translucent texture prevalent in all the 

 species of Erythropsis. A small pusule is connected with the tentacular recess with an accessory 

 spheroidal one close at hand. Another similar sphere lies near the anterior flagellar pore, but 

 no pusule connecting either with the pore or sphere was noted. 



The nucleus is broadly ellipsoidal, with the major axis 1.25 the minor, and subparallel to the 

 major axis of the body. It lies slightly anterior to the middle of the body. No moniliform 

 chromatin threads were evident. No chromatophores or food balls were present. 



DiMEXsioxs. — Leugtli of body, 89^; transdiameter, 61;^; major axis of 

 mieleus, 30/^ ; leugtli of tentacle, probably contracted, 55/* ; diameter of pigment 

 body, 20/i ; of lenses, 6m by 10/*. 



Occurrence. — One individual taken in a haul of a No. 25 silk net 0.75 mile 

 off La Jolla, California, August 13, 1917, from 83 meters to the surface in 

 surface temperature of about 22° C. It occurred with E. minor and another 

 undetermined species of Erythropsis. 



Comparisons. — This species belongs to the sul)genus Pohjopsidella with 

 compound lenses including Erythropsis scarlatina, E. lahrum. and E. richardi. 

 It is nearest in this particular to the first named, having six instead of five 

 lenses in the row. It is unique in the radial processes from the pigment body 

 and has the most asymmetrical epieone in the genus. The mottling of the 

 surface is somewhat like that figured by Schiitt (1895) for Pouchetia (^Ery- 

 thropsis) cochlea. The tentacle is of the non-capitate form seen in E. scarlatina, 

 E. minor, and E. richardi, but bears a terminal stylet as in E. cornuta, E. minor, 

 and E. extrudens, and is posteriorly directed as in all species except E. extru- 

 de ns. The species is unique in the genus in the pattern exhibited by the 



