On the Names or Existence of three Exotic Starfishes. 25 



h. The absence of a flagellum. 



c. The form of the penis and vas deferens. 



There are few anatomical points which connect either of the 

 above species with T. haliotidea, and there are no grounds 

 whatever for retaining T. scutulum as a variety of T. halio- 

 tidea. 



The generative systems of T. bisulcata, Risso, and 

 T. Pecchwln, Bourg.*, have been compared with those of all 

 the above three species, and they agree very closely with 

 T. scutulum, of which both are probably varieties ; but a 

 further investigation of their general anatomy is desirable 

 before finally classing them as such. 



EXPLA^\\TION OF PLATE I. 



Fiff. 1 . Testacella haliotidea, Drap. 



Fig. 2. Testacella scutulum, Sowerty. 



Fig. 3. Testacella Maugei. F^r. 



Fig. 4. Testacella haliotidea, Drap. Variation in the form of the penis. 



alb.g. Albumen gland. ]).r.m. Penal retractor muscle. 



Jl. Flagellum. r.d. Receptacular duct. 



h.d. Hermaphrodite duct. r.s. Receptaculum seminis. 



h.g. Hermaphrodite gland. v. Vestibule. 



ov. Oviduct. J. v.d. Vas deferens. 



p. Penis. vg. Vagina. 

 pr. Prostate. 



IV. — On the Names or Existence of three Exotic Starfishes. 

 By F. Jeffrey Bell, M.A. 



I hope the following notes will be found to be of some 

 assistance in the systematic nomenclature of Asteroidea. 



'^Asterina marginata (Val.), Perrier." 



The species referred to thus in the ' Challenger ' Report of 

 Asteroidea should be called A. stellifer, jMobius. So far as 

 Valenciennes is concerned he only wrote a manuscript label 

 for the Mu.seum in the Jardin des Plantcs. llupe, in 1857, 

 printed the name in vol. iii. (MoUusqucs) p. 100 of the Exp. 

 de rAm(;r. du Sud, but it is a nomen nudum. In 1859 

 Mobius, in the Abh. Gcb. Naturw. Hamburg, iv. 2, p. 4, 

 described Asteriscus stellifer, and, in 1860, Liitken (Vid, 



* Boll. Mas. Zool. Torino, 1888, vol. iii. no. 43, pp. 1-10, 1 pi. 



