194 BULLETIN OF THE BUREAU OF FISHERIES. 



An outline drawing of the head and horns of all the species except pectoralis" is here included for 

 facility of comparison. (See pi. xv.) 



The four with three horns {pectoralis is the fifth) are arranged with the dorsal horn uppermost; 

 the others are arranged as seen from the dorsal surface, as they are usually represented in figxu-es, except 

 anomala, whose distortion compels a diagonal view from the anterior end. 

 Lemsea diceracephala (Cimnington), 1914. 



LertKBocera diceracephala Cunnington. Proceedings Zoological Society of London, 1914, p. 824. 



Found in Lake Tanganyika on the gill arches of a large Clarias mossambicus. Only one perfect 

 specimen known. 



Lemaea anomala, new species. (PI. xiv, fig. 68-70, 73, 74.) 



Host and record of specimens. — ^Two females, one badly mutilated, were taken by H. D. Lucas 

 from the body of Micropterus salmoides caught in Black Creek, N. C. The better specimen has been 

 given Catalogue no. 47756, U. S. National Museum, and becomes the type of the species. 



Specific characters of female. — General body form quite bizarre. In consequence of a flexiue just 

 behind the second swimming legs the cephalothorax is turned ventrally at right angles to the body 

 axis, making the head parallel with that axis. A single pair of forked horns are attached to the dorsal 

 surface of the first and second thorax joints. They are slightly flattened dorsoventrally, but very 

 plump, and extend backward with their tips projecting slightly behind the angle of the flexure; these 

 tips are swollen into subspherical knobs. The neck behind the head gradually increases in diameter 

 back to the third swimming legs; just beyond these it is rather abruptly contracted to one-third its 

 former size for a short distance. This constricted portion probably represents the region in contact 

 witli the skin of the host, all the anterior portion being buried in the tissues of the fish while the poste- 

 rior part hung free in the water. Behind the constriction the neck again widens, but not as much as 

 before, back to the fourth swimming legs, where it is again slightly constricted. Immediately behind 

 these legs the genital segment begins and is widened abruptly to three and a half times the diameter of 

 the fourth segment, forming a spherical swelling, which then narrows to twice the diameter and extends 

 backward as an abdomen of uniform thickness, as long as the fourth segment and bluntly rounded at 

 the tip, where it ends in two minute anal laminae, each tipped with a short nonplumose seta. On the 

 ventral surface, behind the spherical swelling and in front of the vulvae, is the pregenital prominence 

 in the form of a sphere of the same diameter as the abdomen and projecting its entire length. In the 

 angle between this sphere and the abdomen posteriorly are the vulvae with the remains of a pair of 

 emptied egg sacks attached to them. 



Head ovoid, the base of the oval posterior and raised considerably above the dorsal surface; first 

 anteimae four- jointed and moderately armed with setae; second antennae two-jointed, the terminal joint 

 ■uncinate; second maxillae of the usual pattern ending in two claws; maxillipeds with a swollen basal 

 joint, armed on the inner edge with a short spine, and a much narrowed terminal joint bearing five long 

 curved claws. 



Total length, 8 mm. Cephalothorax in front of flexure, i mm. Neck from the flexure to the genital 

 segment, 4.65 mm. Genital segment and abdomen, 2.80 mm. Diamete/ of neck at third legs, 0.50 

 mm. Diameter of genital segment, 1.20 mm. 



Color (preserved material), a brownish gray, genital segment and abdomen, darker than the head 

 and neck. 



(anomalus, unusual, exceptional, alluding to the general form.) 



Remarks. — There can be no doubt that this represents a new species, since it has not a single feature 

 in common with other species and yet possesses every generic detail. Its unlikeness to other species is 

 so pronounced that it may be a monstrosity, but even as such it is worthy of description and record. 



Lemsea dolabrodes, new species. (PI. xiv, fig. 71, 72, 75-78.) 



Host and record of specimens. — Five females with egg strings were taken from Lepomis pallidus in 

 Lake Pepin, Wis., by A. F. Shira, director of the U. S. Fisheries biological station, Fairport, Iowa, and 

 were generously turned over to the author. The most perfect of these has been selected as a type female 

 and has been given catalogue no. 47757, U. S. National Museum. The others become paratypes with 

 catalogue no. 47758, U. S. National Museum. 



a No figures of this species have ever been published. 



