12 ARKIV FÖR ZOOLOGI. BAND 14. N:0 10. 



Specific characters of male. General body form quite 

 similar to that of the male of C. palpifer and C. pinguis. 

 The cephalothorax is moderately inflated and is entirely 

 covered by the dorsal carapace. The second, third, and 

 fourth segments are free; the genital segment is acorn-shaped 

 and terminates in a pair of long and acuminate anal laminae. 

 The appendages are like those of the female except that the 

 first maxillae lack the teeth on their posterior margins, and 

 the terminal claws of the second maxillae and maxillipeds 

 are slender and strongly curved. The first and second swim- 

 ming legs are one-jointed and destitute of setae. 



Color (preserved material) a uniform snow-white. 



Total length O.öo mm. Greatest diameter O.25 mm. 



{sixteni, to Dr. Sixten Bock, the collector of these 

 Japanese parasites). 



Remarks. This species closely resembles C. depressus 

 ScoTT, G. flurae Kroyer and C. soleae Kroyer. Its most 

 distinctive characters are the slender first antennae, the 

 shape of the dorsal surface of the head, the pointed lateral 

 margins of the first thorax segment, the scalloped posterior 

 börder of the second segment, and the shape of the mandi- 

 bles and first maxillae. 



Phrixocephalus diversus Wilson. 

 Pl. 1, figs. 6—7: 2, fig. 8. 



Phrixocephalus diversus Wilson, Proceedings U. S. Na- 

 tional Museum, vol. 53, p. 77; pl. 10, figs. 86—87. 



Höst and record of specimens. Two small specimens 

 of a species of Callionymus were captured at a depth of 10 

 meters near the Zoological station at Misaki, Sagami, Japan. 

 The larger one, 55 mm. long, had two specimens of this par- 

 asite fastened in its right eye. The smaller one, 40 mm. in 

 length, had three specimens fastened in its right eye and 

 one in its left eye. The specimens in the right eye of each 

 fisli were dissected out, the one in the left eye was not 

 disturbed. 



The two from the larger fish were adult females with 

 egg strings. Of the four from the smaller fish, one in each 



