PARASITIC WORMS— LEIPER AND ATKINSON. 



E. hamanni fifteen longitudinal rows and eighteen transverse rows. In E. antarcticus 

 (type-material and that in the present collection) the hooks are arranged in ten 

 longitudinal and fifteen to seventeen transverse rows. Through the kindness of 

 Dr. W. Michaelsen, of the Hamburg Museum, we have been aide to examine the type- 

 material of E. hamanni v. Linstow also. We find that the specimens correspond in 

 every essential with the types of E. antarcticus and with our own material. 



We therefore ascribe E. <int<< rcticux llennie and E. *ij/h<> llailliet and Henry 

 to Corynosoma hamanni, in addition to the material which forms the basis of the 

 present note. A number of larval stages (PL 11, fig. 12) of this species were obtained 

 from Trematomus bernacchii ; in some cases the rostellum was not evaginated. 



Pomporhynchus, Porta. 

 !). Pomporhynchus turbinella (Dies.) Porta. (PL II. fig. 10.) 

 Echinorhynclius turbinella, Diesing, 1850. 



Host. — Numerous specimens of this curious form were collected by Mr. I ). (4. Lillie 

 from the Humpback Whale (Megaptera) in the Bay of Islands, New Zealand (Stat. 14!)). 



Parasite. — The two sexes are of almost similar size and shape : in some cases the 

 bursa in the male is extruded from the centre of the posterior rounded end as a 

 shallow funnel. The body is cylindrical, of about 1*0 cm. to L "3 cm. in length and0'3cm. 

 in diameter. The body tapers anteriorly to form a narrow neck '2 mm. long 

 (PL 11, fig. 10, c), which terminates in an almost globular head. This spheroid head has 

 an armature of spines set upon coarse chitinons bases on its upper aspect ( Fig. 10. A). The 

 spines art; arranged in somewhat irregular series; there are five distinct rows on the 

 peripheral portion, but those lining the sulcus surrounding the rostellum are very 

 irregular. There are about ten rows in all. Their arrangement is somewhat irregular 

 and the exact determination of their number is difficult. The shape of the head and the 

 roughened appearance, due to the spines, remind one vividly of the rose of a watering- 

 can. At the summit of the head there is a partially retracted rostellum (Fig. 10, a), the 

 unarmed base of which extends through the head to the insertion of the neck. The 

 hooks on the rostellum differ markedly from those on the head ; they are smaller and 

 more pointed. There are twenty longitudinal rows, each composed of three hooks. 



In the male the prostatic glands (Fig. 10. <■) are greatly elongated and deeply 

 pigmented. 



EcJiiuorhynehus, 0. V. Midler, 1770. 

 10. Echinorhynclius Campbell i, Leip. and Atk. (1M. lb fig. 1-0- 



Echinorliynchus camjabelli, Leiper and Atkinson, Proc. Zool. Soc, 1914, p. 22o. 



Male 11 nun. l<>nn'. tYinale 10 mm. Thin-walled. 2 • •") mm. broad. Proboscis 2 nun. Hook-bearing 

 rostellum 0 - 5 mm. Hooks 1 t linear series of 8 hooks each. Testes oval, occupying the third fifth of 

 the body. 



Host. — Among the Echinorhynchi from Trematomus bernacchii were a pair of 

 relatively large forms which are the co-types of the present species. 



