same source as the material of Brinkmann and, in addition to that, one example of a 

 second species of Chimaericola from the gills of Chimaera coUiei Lay and Bennett 

 from the Pacific Ocean near the shores of San Francisco which has not yet been 

 described. 



The normal clamp of Chimaericola has the appearance of a cup-shaped 

 formation, flattened in the dorsoventral direction and lying on a special outgrowth 

 of the attaching disc. In relation to the disc, the clamps are oriented in such a way 

 on its ventral surface that they constitute two mirror-like rows similar to each 

 other, the right and left containing four clamps each of more or less the same size. 

 Together with the mirrorness (bilateral symmetry, nobis) of the location (Fig. 293) 

 the clamps of the right and left sides are "mirrored" (bilaterally symmetrical, nobis ) 

 in the structure and correlation of the separate parts which comprise them, and essen- 

 tially do not differ in any way from each other. The separate clamp (Fig. 294) is 

 shown in the open state which practically is never encountered and can be obtained 

 only artificially. It has the shape of an almost regular, rounded cup the circumference 

 of which bears 4 invaginations along the two perpendicular diameters--2 along the sides 

 of the clamp on the right and left sides and 2 correspondingly on the front and back. 

 These depressions are formed in the first place by the soft parts of the clamp and 

 particularly by the thickened edges (lobes) of the musculature. With this, the anterior 

 right and left lobes are completely interrupted between each other and are separated 

 from the posterior ones, whereas the latter, properly speaking, represents a single 

 lobe which is merely curved in the middle. 



Thus, in the natural state the clai-np is bent in half in such a 

 way that its first half becomes the anterior valve of the clamp and the 

 second- -the posterior, so that we can accept that there exist right and 

 left lobes of the anterior and a united lobe of the posterior valves. A 

 middle chitinous "parenthesis" lies along the line (the midline, nobis ) of 

 the clamp in such a fashion that its anterior end reaches to the anterior 

 edge of the clamp and slightly protrudes outside between the right and left 

 lobes. The basal part of the "parenthesis" follows the curvature of the 

 valves of the clamp and its posterior end is located within the body of the 

 posterior valve, somewhat short of its free end. On the unfolded clamp it 

 is clearly apparent that two other chitinous "parentheses" lie to the right 

 and to the left of the longitudinal axis of the clamp in direct proximity with p^ ^^2 



the edge lobes curving approximately in parallel fashion to their curvature 

 and forming, in such a fashion, 2 chitinous bows --right and left. With this, 

 their larger part is located in the anterior valve where they come closer 

 to the middle parentheses and to the middle of the anterior edge. As 

 regards the posterior parts of the parentheses they are further away from 

 the edge lobe (posterior edge?, nobis) and their ends are considerably 

 further removed from each other. On the closed clamp, i.e. , on the 

 clamp which is in its normal state, both of these "parentheses" occupy 

 the position in the perpendicular plane in relation to the plane of the middle 

 "parenthesis. " Thus, the clamp acquires skeletal support which gives it a 



493 



