38 Crust. 
CRUSTACEA. 
Doropygus (Thorell) and Notopterophorus (Costa). The known species 
enumerated and described ; the latter is to be considered only as a sub- 
genus of the former. D. ( N .) papilio (Hesse) and elongatus var. elatus 
(Costa), found in the gill-sac of Phallusia mentula (Mull.), and D. ( N .) 
elongatus (Costa) in that of P. mamillata (Cuv.), the external and internal 
structure of all three comparatively described ; the external appendages 
of the parasitic animals are probably caused by the abundance of nourish- 
ment, which is stored up in the form of fat near the cuticle. Giesbrecht, 
MT. z. Stat. Neap. iii. pp. 298-372, pis. xxii.-xxiv. Critical remarks on 
this paper by Aurivillius, CEfv. Ak. Forh. 1882, pp. 67-70. 
Botachus cylindratus (Thorell), Bohuslan, on Phallusia ohliqua and 
mentula , Aurivillius, l. c. No. 3, pp. 63-65, pi. v. figs. 14-16. The same 
observed at Naples in the branchial sac of Phallusia , the adult female in 
the rectum, by Giesbrecht, MT. z. Stat. Neap. iii. p. 296. 
Gynentophorus glohularis (Costa) found on the coast of Bohuslan on 
Styela grossa , Phallusia ohliqua and mentula , and described by Aurivillius, 
l. c. pp. 56-58 ; genital organs, and No. 8, p. 70, pi. xiii. fig. 13. 
Ascidiicola rosea (Thorell). Antennae and buccal organs described ; id. 
1. c. No. 8, pp. 93-96, pi. xvi. figs. 13-22. 
Buprorus loveni (Thorell) ; id. 1. c. No. 3, p. 63, pi. v. fig. 13, first 
antenna. 
Ergasilid^e. 
Ergasilus sieboldi (Nordm.), observed on the gills of the herring at 
Kiel; Giesbrecht, iv. Bericht d. Commiss. z. Untersuch. d. deutschen 
Meere, p. 88. 
Ergasilus centrarchidarum , sp. n., R. Wright, P. Canad. Inst. i. p. 244, 
pi. i. figs. 12-18, Canada, on the gills of Ambloplites rupestris } Eupomotis 
aureus , and Lcpomis auritus ; only females obsorvod. 
Lichomolgus agilis (Leydig, Doridicola) on Doris tuberculata and verru- 
cosa , Gullmarsford, Bohuslan, male and female described ; Aurivillius, 
l. c. No. 3, pp. 34-38, pi. v. figs. 1-12, and No. 8, pp. 42 & 43, pi. xiii. 
fig. 9. 
Ascomyzontidjj. 
Ascomyzon lilljeborgi (Thorell), Bohuslan Coast, on Phallusia virginea , 
described ; id. 1. c. No. 8, pp. 105-107, pi. xvi. figs. 23-26. 
LERNiEIDiE. 
Peroderma bellottii, sp. n., Ricchiardi, P.v. Soc. Tosc., May, 1882, and 
Zool. Anz. 1882, p. 475, Mediterranean, on Scopelus benoiti. 
Chondracanthidj;. 
Chondr acanthus. The known species of the Mediterranean and C. 
ninniij sp. n., on Gobius panizzce, described; Ricchiardi, P.v. Soc. Tosc., 
July, 1882, and Zool. Anz. 1882, p. 504. 
Lichomolgus alb ens, for ficula , and furcillatus (Thorell) observed on the 
coast of Bohuslan, on Phallusia , Corella , and Ciona , described ; Aurivil- 
