226 s. GOTO. 



the anterior ones overlapping the posterior portion of the ovary ; 

 ending behind at a distance from tlie first pair of postérieur 

 suckers equal to about the length (jf tlie caudal appendage. 



HohiUd — Gill oî Spinax sp. (J:ip. Tsubakurozamé). 



Localitij — Odawara. 



IÀ//6'— February 1891. 



YII. Calicotyle, Diesing. 



This genus was erected in 1850 by Diesing for a worm found by Kroyer on 

 the surface of the body of liaja nid'utta near the anus and afterwards described and 

 studied more minutely by DiesingO himself, Hoelc,-) and Wierzejski^); and up 

 to the present date it has contained only a single species, C(dicot;/le Kioi/eri, Diesing. 

 Its original diagnosis^^ as given by its founder is as follows : " Corpus planum late 

 obovatum. Caput corpore continuum. Os subterminale transverse ellipticum. 

 Tractus intestinalis bifurcatus ( '? ). Acetabulum basilare ventrale, urcciforme 

 septangulare intus dissepimentis septem a centro radiantibus. Aperturae genitales 



infra os, approximatae. Anus Piscium marinorum ectoparasita." This 



was emended in his " Eevision " as follows : " Corpus planum late obovatum. 

 Caput corpore continuum. Os subterminale transverse ellipticum. Acetabulum 

 unum subbasilare ventrale, urceiforme, septangulare, intus dissepimentis septem e 

 centro radiantibus, quinque inermibus uncino valido vaginato retractili armatis. 

 Androgyna ; aperturae genitalium infra os oblique juxtapositae approximatae. Porus 

 excretorius Tractus intestinalis bicruris, coecas. — vipara. — Piscium mari- 

 norum endo- et ectoparasita." The last remark was probably occasioned by the 

 fact that I'dUcotijle Kroijeii was found by 11 ok in the anus as well as in the rectum. 

 Subsequent diagnoses of the genus have been based on that of Diesing, which 

 is no doubt in the main correct, but which I believe I can improve as follows : 



lîody flat, ovate, with a median notch at the pos- 



1). Diesino-— Vierzehn Arten von Bdelliden. Denkschr. d. k. Acad. d. Wiss. Wien., Bd. 

 14-, 1858. p. G3-80. Cited on Braun's authority. 



2). Hoek— Oui Calicotyle Kroyeri. OetVersigt 'af. k. vet. Akad. Förhandl, 1856. Cited 

 on the combined authority of Braun and Wierzejski. 



3). Wierzejski— Zar Keuntaiss de3 B.iues von Calicotyle Kroyeri. Zoitsch. f. wiss. Zool., 

 Bd. 59, 1877. p. 551. 



4). Diesing— Syst. helm. p. 431 & G51. 



